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Statistical significance is important in judging the efficacy of a particular intervention.

whereas clinical significance focuses on the practical importance of an intervention and its impact on patient outcomes.

Clinical significance refers to the practical importance or relevance of a particular intervention or outcome in a clinical setting.

It addresses the degree to which a particular treatment or intervention improves a patient's overall functioning or quality of life.

Statistical significance, on the other hand, refers to the probability that a particular finding or result would have occurred by chance.

It is based on statistical tests to determine whether differences between two groups or treatments are statistically significant.

Statistical significance is important in determining whether a particular intervention is effective, whereas clinical significance is more important to clinicians and patients.

Interventions may produce statistically significant results, but may not be clinically significant if the improvement is not meaningful for the patient's daily life or overall health.

To harness clinical significance to support positive outcomes in EBP projects, it is important to focus on patient-centered outcomes that are relevant to patient needs and goals.

For example, a project evaluating a new drug for depression could demonstrate that the drug not only provided a statistically significant improvement in depressive symptoms.

Clinical relevance was demonstrated. Ability to return to social functioning or work.

More relevant for patients and clinicians. By prioritizing patient-centered outcomes and measuring the practical impact of interventions, healthcare providers can leverage clinical relevance to support positive outcomes of EBP projects.

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Answer:

i cant solve what i cant see

Step-by-step explanation:

there is no problem

The number 357 in binary is 101100101 and x^2 - 3x - 10 when factored is (x - 5)(x + 2). Other solutions are below

The triangle and the loci are attached

(a) To convert 357 to a binary number, we can use the division-by-2 method:

357/2 gives 178 R 1

178/2 gives 89 R 0

89/2 gives 44 R 1

44/2 gives 22 R 0

22/2 gives 11 R 0

11/2 gives 5 R 1

5/2 gives 2R1

2/2 gives 1R0

1/2 gives 0 R 1

Therefore, 357 in binary is 101100101

(b) To factorise x^2 - 3x - 10, we have

x^2 - 3x - 10 = (x - 5)(x + 2)

(c) To solve 5x^2 - 7x + 1 = 0 using completing the square, we have:

x^2 - (7/5)x + 1/5 = 0 -- make the coefficient of x^2 equals 1

So, we have

x^2 - (7/5)x = -1/5

Next, we have

x^2 - (7/5)x + (7/10)^2 = -1/5 + (7/10)^2

Factorize

(x - 7/100)^2 = -1/5 + (7/10)^2

Simplifying the right-hand side, we get:

(x - 7/10)^2 = 29/100

Taking the square root of both sides, we get:

x - 7/10 = ±√29/10

Adding 7/10 to both sides, we get:

x = 7/10 ±√29/10

So, we have

x = 7/10 + √29/10 or x = 7/10 - √29/10

Evaluate

x = 1.24 or x = 0.16

Therefore, the solutions are x = 0.160 and x = 1.24, rounded to 2 decimal places.

(a) To evaluate 102 (mod 4), we divide 102 by 4 and find the remainder:

102 divided by 4 gives a quotient of 25 with a remainder of 2.

Therefore, 102 (mod 4) is 2.

(b) First, we need to find the volume of the bucket. We can do this by treating it as a frustum of a cone:

The radius of the top of the frustum is 10m, the radius of the bottom is 6m, and the height is 16 m.

The volume of a frustum of a cone is given by:

V = (1/3)πh(R^2 + r^2 + Rr),

Plugging in the values, we get:

V = (1/3) * 3.14 * 16 * (10^2 + 6^2 + 10*6)

V = 3282.35 m^3

Finally, we can find the depth of water in the rectangular tin by using the formula for volume:

V = Bh

where B is the area of the base of the tin and h is the height of the water in the tin.

Plugging in the values, we get:

3282.35 m^3 = 48 cm^2 h

So, we have

3282.35 m^3 = 0.0048 m^2 h

Solving for h, we get:

h = 683822.916667 m

Approximate

h = 683822.92 m

Therefore, the depth of water in the tin is 683822.92 m

The area of a sector of a circle is given by:

A = (θ/360)πr^2,

So, we have

300 = (θ/360)

300 = (θ/360) * (22) * 112

Solving for θ, we get:

θ = 300 * 360 * 1/(22 * 112)

θ ≈ 43.83 degrees

The perimeter of the sector is the sum of the arc length and the lengths of the two radii that form the sector.

The arc length is given by:

s = (θ/360)2πr

Plugging in the values, we get:

s = (43.83/360)(2)(22/7)(28)

s ≈ 21.43 cm

The length of each radius is 28 cm. Therefore, the perimeter of the sector is:

P = 2(28) + 21.43

P ≈ 77.43 cm

Therefore, the perimeter of the sector is 77.43 cm, rounded to 2 decimal places.

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Answer: The GCF of 7, 15, & 21 is 1

Step-by-step explanation: the greatest number that divides all three numbers is 1

The given statement "as the size of a sample increases, the standard deviation of the distribution of sample means increases always." is false. As the sample size increases, the standard deviation of the distribution of sample means decreases, not increases.

This is due to the Central Limit Theorem, which states that as the sample size increases, the distribution of sample means approaches a normal distribution with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.

Therefore, as the sample size gets larger, the distribution becomes more concentrated around the population mean, which results in a smaller standard deviation. This is why larger sample sizes are generally preferred in statistical analysis, as they provide more accurate estimates of the population parameters.

So, the given statement is false.

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Answer:

-86

Step-by-step explanation:

Calculate the expression in the brackets:

7 + ( 5 - 92 + 3 x 2 )

Simplify:

7 + ( 5 - 92 + 6 )

7 + ( 5 - 98 )

7 + ( -93 )

7 - 93

-86

The rate of change (slope) is -2.

To determine if the table of values describes a linear function, we need to check if there is a constant rate of change between any two points.

Using the first two points, we can find the rate of change (slope) as:

slope = (y2 - y1) / (x2 - x1)

         = (8 - 10) / (6 - 5)

         = -2

Using the second two points, we can also find the rate of change as:

slope = (y2 - y1) / (x2 - x1)

       = (6 - 8) / (7 - 6)

       = -2

Since both rates of change are the same, the table of values describes a linear function. The rate of change (slope) is -2.

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Answer: supplementary same side exterior angles

Step-by-step explanation:

The dimensions of the rectangular page (in inches)  to be use the least amount of paper will be 8.37 inch and 4.18 inch.

A Rectangular shape is a four sided-polygon, having all the internal angles equal to 90 degrees or one right angle. The two sides at each corner meet at right angles. The opposite sides of the rectangle are equal in length.

Let, x width of the rectangular area that is to be printed

y height of the area that is to be printed.

Given that A rectangular page contains 35 square inches of print.

so  xy= 35 a constant-------------(1)[ by the formula of rectangular area]

we want to minimize.

f(x, y) = (x+4)(y+2)

        = xy+4y+2x+8

        = 35+8+4y+2x [putting the value from equation (1)]

       = 43+4y+2x

We have to minimize the function

   g(x, y)= 4y+2x

            = 4(35/x)+ 2x

            = 140/x+2x

Let us take h(x)= 140/x+2x

                  h'(x)= d/dx( 140/x+2x)

                          = -140/x² + 2

For minimum value we will take h'(x)=0

                           -140/x² + 2=0

                           ⇒2x² =140

                            ⇒x² =70

                            ⇒x= √70=8.37

y =35/√70= 4.18

Hence, the dimensions of the page (in inches) to be use the least amount of paper will be 8.37 inch and 4.18 inch.

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Therefore , the solution of the given problem of coordinates comes out to be B''' = (-4, -1) and C''' = (-6, 4)

Using a variety of elements or coordinates, a reference frame can precisely determine position when used in conjunction with other mathematical elements on this location, such as Euclidean space. One can find a thing or a location in mirrored flight by using the coordinates of the which appear like collections of numbers. A pair surface is able to be used to locate an item using the y and x coordinates.

Here,

We flip a point across the x-axis while maintaining the y-coordinate to mirror it over the x-axis.

We flip a point across the y-axis while maintaining the x-coordinate to mirror it over the y-axis.

Overlooking the x-axis:

A' = (2, 0) -> A'' = (2, -0) = (2, 0)

B' = (4, 1) -> B'' = (4, -1)

C' = (6, -4) -> C'' = (6, 4)

Considering the y-axis:

A'' = (2, 0) -> A''' = (-2, 0)

B'' = (4, -1) -> B''' = (-4, -1)

C'' = (6, 4) -> C''' = (-6, 4)

As a result, after reflecting A, B, and C over the x-axis and then the y-axis, the finished image is as follows: A''' = (-2, 0)

B''' = (-4, -1)

C''' = (-6, 4)

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The total interest that must be paid is $101.32.

Based on the information, you would need to pay a total interest amount of $101.32.

First, let's calculate the interest charges for each month:

Month 1:

Interest charge = (0.010111 * $3300) = $33.4363

Month 2:

New balance = $3300 + $33.4363 = $3333.4363

Interest charge = (0.010111 * $3333.4363) = $33.7707

Month 3:

New balance = $3333.4363 + $33.7707 = $3367.207

Interest charge = (0.010111 * $3367.207) = $34.1167

Now, if the account is paid off within the 3-month period, all interest charges are canceled. However, since the payment is made 1 day late, the interest for that extra day is not canceled.

Total interest amount = $33.4363 + $33.7707 + $34.1167

= $101.3237

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The probability that the 3-card hand contains only face cards is 1/100 or 0.01.

To find the probability that the 3-card hand contains only face cards, we'll follow these steps:
1. Determine the total number of ways to draw 3 cards from a deck of 52 cards.
2. Determine the total number of ways to draw 3 face cards from the deck.
3. Divide the number of ways to draw 3 face cards by the total number of ways to draw 3 cards.
Calculate the total number of ways to draw 3 cards from a deck of 52 cards.
This can be found using the combination formula,

which is C(n, k) = n! / (k!(n-k)!),

where n is the total number of cards and k is the number of cards drawn.

In this case, n=52 and k=3.
C(52, 3) = 52! / (3!(52-3)!)

= 22100
Calculate the total number of ways to draw 3 face cards from the deck.
There are 12 face cards in the deck (4 suits with 3 face cards each: Jack, Queen, and King).

We need to find the number of ways to choose 3 face cards from these 12.
C(12, 3) = 12! / (3!(12-3)!) = 220
Divide the number of ways to draw 3 face cards by the total number of ways to draw 3 cards.
Probability = (Number of ways to draw 3 face cards) / (Total number of ways to draw 3 cards)

= 220 / 22100

= 1/100
The probability that the 3-card hand contains only face cards is 1/100 or 0.01.

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The required probability of rolling a 2 exactly 4 times in 7 rolls of a six-sided die is [tex]\frac{161}{5000}[/tex] in fraction form or approximately 0.03226 as a decimal.

A number that indicates how likely an event is to occur is called its probability. It is expressed as a number between 0 and 1 or as a percentage using percentage notation between 0% and 100%. The higher the probability, the more likely the event is to occur.

[tex]$\begin{aligned} P(X = 4) &= \binom{7}{4} \left(\frac{1}{6}\right)^4 \left(\frac{5}{6}\right)^3 \\&= \frac{7!}{4!3!} \cdot \frac{1}{6^4} \cdot \frac{5^3}{6^3} \\&= \frac{35 \cdot 125}{6^7} \\&= \frac{4375}{135216} \\&\approx 0.03226\end{aligned}[/tex]

Therefore, the probability of rolling a 2 exactly 4 times in 7 rolls of a six-sided die is [tex]\frac{161}{5000}[/tex] in fraction form or approximately 0.03226 as a decimal.

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Answer:

A. (x - 1)² + (y - 1)² = 2

This is the equation of circle with center at (1, 1) and radius √2

Step-by-step explanation:

We can use the following trigonometric identities to convert the given polar equation to rectangular form:

cosθ = x / r

sinθ = y / r

Substituting these identities into the given polar equation, we get:

r = 2cosθ + 2sinθ = 2(x / r) + 2(y / r)

Multiplying both sides by r, we get:

r² = 2x + 2y

We can also use the Pythagorean identity to express r² in terms of x and y:

r² = x² + y²

Substituting this expression into the previous equation, we get:

x² + y² = 2x + 2y

x²+y² = 2y+2x

x²-2x+y2-2y=0

(x²-2x+1)+(y²-2y+1)=2

(x-1)²+(y-1)² = (√2)²

This is the equation of circle with center at (1, 1) and radius √2

OR

Completing the square for both x and y terms, we get:

(x - 1)² - 1 + (y - 1)² - 1 = 0

Simplifying, we get:

(x - 1)² + (y - 1)² = 2

Therefore, the rectangular form of the polar equation r = 2cosθ + 2sinθ is:

A. (x - 1)² + (y - 1)² = 2

chatgpt

This expression can be simplified by using some trigonometric identities12. First, we can use the identity sin(2x) = 2sin(x)cos(x) to rewrite the first term. Then, we can use the identity cos(2x) = cos^2(x) - sin^2(x) to rewrite the fourth term. We get:

sin(x) + 2cos(x) - cos(2x) + cos(x) = 2sin(x)cos(x) + 2cos(x) - (cos^2(x) - sin^2(x)) + cos(x) = 2sin(x)cos(x) + 3cos(x) - cos^2(x) + sin^2(x)

Next, we can use the identity sin^2(x) + cos^2(x) = 1 to simplify the last two terms. We get:

= 2sin(x)cos(x) + 3cos(x) - cos^2(x) + sin^2(x) = 2sin(x)cos(x) + 3cos(x) - cos^2(x) + (1 - cos^2(x)) = 2sin(x)cos(x) + 3cos(x) + 1

This is the simplest form of the expression.

Answer:

Blue

Step-by-step explanation:

i did this before

The probability that the response time exceeds 5 seconds is about 0.2231. The probability that the response time exceeds 10 seconds is about 0.0498. These probabilities are calculated using the CDF of the exponential distribution with mean 3 seconds.

The probability that the response time exceeds 5 seconds can be calculated using the cumulative distribution function (CDF) of the exponential distribution:

P(X > 5) = 1 - P(X ≤ 5) = 1 - F(5)

where F(x) is the CDF of the exponential distribution with mean 3 seconds. The CDF is given by:

F(x) = 1 - e^(-x/3)

Substituting x=5, we get:

P(X > 5) = 1 - F(5) = 1 - (1 - e^(-5/3)) = e^(-5/3) ≈ 0.2231

Therefore, the probability that the response time exceeds 5 seconds is approximately 0.2231.

Using the same method as above, we can calculate the probability that the response time exceeds 10 seconds:

P(X > 10) = 1 - P(X ≤ 10) = 1 - F(10) = 1 - (1 - e^(-10/3)) = e^(-10/3) ≈ 0.0498

Therefore, the probability that the response time exceeds 10 seconds is approximately 0.0498.

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The best recommendation for the polling firm to follow in the future would be to sample people who have cell phones, in addition to those with landlines.

This approach would help in increasing the diversity of the sample, as relying solely on landline telephones may lead to underrepresentation of certain demographics, such as younger voters who are more likely to use cell phones instead of landlines.

By including both landline and cell phone users, the firm would be able to gather a more accurate and representative sample of the population, which would result in better predictions for the election outcomes.

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||u|| = 16.492; θ = 165.964°  are the vector magnitude and direction of u.

What is a straightforward definition of a vector?

A quantity or phenomena with both size and direction being independent of one another is called a vector. Also, the phrase specifies how such a quantity is represented mathematically or geometrically. Examples of vectors in nature include weight, force, electromagnetic fields, momentum, and velocity.

Let's find the magnitude of each component:

Let

(x₁,y₁ ) = (4,4)

(x₂ , y₂ ) = (-12 , 8 )

  u = ax + by

 ll u ll = √a² + b²

     So, let's find a and b:

    a = l x₂ - x₁ l =l -12 - 4 l = l -16 l  = 16

    b = l y₂ - y₁ l = l 8 - 4 l = l4l = 4

so,

        ll u ll = √16² + 4²

                = √272

                ≈ 16.492

And the direction is:

     θ = 180 - tan⁻¹ (b/a )

         = 180 - tan⁻¹(4/16)

    θ ≈ 180 - tan⁻¹ (4/16)

       ≈ 165.953.

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The water is needed if we want to adjust the total solid (TS) to 9% that is given by 990 kg.

The process of multiplying integers in the shape of a fraction is called cross multiplication. Cross multiplying, also known as cross multiplication, is the process of multiplying the numerator of one fraction by the denominator of the other fraction on the other side of an equals to sign. Cross multiplication is a method for comparing fractions.

Cross multiplying is the process of multiplying the first fraction's numerator, which is on one side of the equals to symbol, by the second fraction's denominator, which is on the other side of the equals to sign. The second fraction's numerator is multiplied by the denominator of the first fraction in a similar manner. Cross multiply is another name for the butterfly method or cross-multiplication. The cross-multiplication approach is used to find one or more variables in a fraction. Cross multiplying may be used to compare fractions as well.

We have,

Miscanthus contains 80% solids

Inoculum contains 5%

Total batch of Miscanthus is 1 ton = 1000 kg

and 10 tons of inoculum is 10,000 kg

So, Miscanthus = 1000 x 80% = 800 kg solid

Inoculum = 10000 x 5% = 5000 kg solid

So the total TS = 800 + 5000 = 5800 kg.

The amount of water needed if TS is 9%.

For 5800 kg we need 11000 kg so for, 522 kg we need, 990 Kg of water.

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a) The sample space of randomly selecting 2 lollipops with replacement is {GG, GC, GL, CG, CC, CL, LG, LC, LL}

b) The sample space of randomly selecting 2 lollipops without replacement is {GC, GL, CG, CL, LG, LC}.

c) The experiment in Part B shows dependent events. The experiment in Part A shows independent events.

It is denoted by the symbol "S" and is a fundamental concept in probability theory because it provides a way to describe all the possible outcomes of an experiment or event.

Part A: The sample space of randomly selecting 2 lollipops with replacement is:

{GG, GC, GL, CG, CC, CL, LG, LC, LL}

Part B: The sample space of randomly selecting 2 lollipops without replacement is:

{GC, GL, CG, CL, LG, LC}

Part C: The experiment in Part B shows dependent events because the outcome of the first draw affects the outcome of the second draw. For example, if the first lollipop drawn is grape, then there is only one grape lollipop remaining, which affects the probability of drawing another grape lollipop on the second draw. The experiment in Part A shows independent events because each draw is done with replacement, so the outcome of the first draw does not affect the probability of the second draw. For example, the probability of drawing a grape lollipop on the second draw is the same whether or not a grape lollipop was drawn on the first draw.

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Answer:

----------------------------

The vertex form of a parabola is:

Given equation is:

Hence h = - 2, k = - 4, therefore its vertex is (- 2, - 4).

Given function:

It has a = 1, hence the graph opens up, therefore the function has a minimum.

To find out how many craft items Chelsea can make, we need to divide the total amount of material she has by the amount of material needed to make one craft item.

First, we need to convert 3 1/3 yards to an improper fraction:

3 1/3 = (3 x 3) + 1 = 10/3 yards

Now we can set up the division:

10/3 yards ÷ 2/3 yards per craft item

To divide fractions, we can multiply by the reciprocal of the second fraction:

10/3 yards x 3/2 yards per craft item = 15/2 or 7.5 craft items

Therefore, Chelsea can make 7.5 craft items with 3 1/3 yards of material. Since she can't make a fraction of a craft item, she could make 7 craft items with some material left over.

First, we multiply the first equation by 5 and the second equation by 7, then subtract the first equation from the second equation to eliminate y. Next, we substitute x = 11/2 into one of the original equations to solve for y. The solution is (x, y) = (11/2, 2). To find the value of y2, we square the value of y.

A mathematical statement known as an equation utilizes the equal symbol (=) to demonstrate the equality of two expressions. A mathematical equation normally consists of constants, variables, and operations such addition, subtraction, multiplication, and division.

To solve this system of equations, we can use the method of elimination.

First, we will multiply the first equation by 5 and the second equation by 7 to get:

10x - 35y = -15

28x - 35y = 84

Now, we can subtract the first equation from the second equation to eliminate y:

28x - 10x - 35y + 35y = 84 - (-15)

18x = 99

x = 99/18 = 11/2

Next, we can substitute x = 11/2 into one of the original equations to solve for y. We'll use the first equation:

2x - 7y = -3

2(11/2) - 7y = -3

11 - 7y = -3

-7y = -14

y = 2

Therefore, the solution to the system of equations is (x, y) = (11/2, 2).

To find the value of y², we simply square the value of y:

y² = 2² = 4

So the value of y² is 4.

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Ans:-

[tex] \: [/tex]

Solution:-

[tex]↣ \: \textsf{-5 ( -2 )³ + 8 ( -2 )²}[/tex]

[tex] \: [/tex]

[tex] ↣ \: \textsf{-5 ( -8 ) + 8 ( -4 )}[/tex]

[tex] \: [/tex]

[tex] ↣ \: \textsf{40 + ( -32 ) }[/tex]

[tex] \: [/tex]

[tex] \textsf{[ + , - = - ]}[/tex]

[tex] \: [/tex]

[tex]↣ \: \textsf{40 - 32 }[/tex]

[tex] \: [/tex]

[tex] \underline{ \underline{↣ \textsf \orange{ \: \: 8 \: \: \: }}}[/tex]

[tex] \: [/tex]

━━━━━━━━━━━━━━━━━━━━━━━━━━━

hope it helps!:)

Answer:1000

Step-by-step explanation: This is what you start out with

The balance after 5 years is $1530.40 in the given case.

The formula for the balance A after t years with continuous compounding at an annual interest rate r for an initial investment P is given by:

[tex]A = Pe^(rt)[/tex]

where e is the mathematical constant approximately equal to 2.71828.

In this problem, P = $1000, r = 0.085 (since the interest rate is 8.5%), and t = 5 years. Therefore, the balance after 5 years with continuous compounding is:

[tex]A = 1000e^(0.0855)\\= 1000e^0.425\\= 10001.5304\\= $1530.40[/tex] (rounded to two decimal places)

Therefore, the balance after 5 years is $1530.40.

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The appropriate test statistic for the hypothesis being tested and to compare the test statistic to a critical value from a distribution table.

An index that is calculated from sample data and whose value determines whether to accept or reject a null hypothesis is a test statistic.

A test statistic is used to determine the probability of obtaining the observed data under the null hypothesis.

If the test statistic falls within a specified range, the null hypothesis is accepted.

If the test statistic falls outside of the specified range, the null hypothesis is rejected.

The test statistic is calculated from the sample data and is based on the distribution of the sample data.

There are many different types of test statistics, each of which is used to test a different hypothesis.

Some common test statistics include the t-statistic, the F-statistic, and the chi-square statistic.
The t-statistic is used to test the difference between the means of two populations.

The F-statistic is used to test the equality of variances between two populations.

The chi-square statistic is used to test the independence of two categorical variables.
In order to calculate a test statistic, one must first formulate a null hypothesis and an alternative hypothesis.

The null hypothesis is the hypothesis that is assumed to be true, and the alternative hypothesis is the hypothesis that is being tested. The test statistic is then calculated from the sample data, and its value is compared to a critical value from a distribution table.

If the test statistic is greater than or equal to the critical value, the null hypothesis is rejected. If the test statistic is less than the critical value, the null hypothesis is accepted.
In conclusion, a test statistic is an index that is calculated from sample data and is used to determine whether to accept or reject a null hypothesis.

It is important to use the appropriate test statistic for the hypothesis being tested and to compare the test statistic to a critical value from a distribution table.

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(a) The fraction of poodles with weights over 9.5 kilograms is about 0.0475

(b) The fraction of poodles with weights of at most 8.6 kilograms is about 0.7486

(c) The fraction of poodles with weights between 7.3 and 9.1 kilograms inclusive is about 0.6488

We can solve this problem using the standard normal distribution, which has a mean of 0 and a standard deviation of 1. We'll first standardize the given values using the formula

z = (x - μ) / σ

where z is the standard score, x is the given value, μ is the mean, and σ is the standard deviation.

(a) To find the fraction of poodles with weights over 9.5 kilograms, we standardize 9.5 kg as follows

z = (9.5 - 8) / 0.9

z = 1.67

Using a standard normal distribution table or calculator, we find that the area to the right of z = 1.67 is approximately 0.0475. Therefore, the fraction of poodles with weights over 9.5 kg is about 0.0475

(b) To find the fraction of poodles with weights of at most 8.6 kilograms, we standardize 8.6 kg as follows

z = (8.6 - 8) / 0.9

z = 0.67

Using a standard normal distribution table or calculator, we find that the area to the left of z = 0.67 is approximately 0.7486. Therefore, the fraction of poodles with weights of at most 8.6 kg is about 0.7486 or 74.86%.

(c) To find the fraction of poodles with weights between 7.3 and 9.1 kilograms inclusive, we standardize both values

z1 = (7.3 - 8) / 0.9

z1 = -0.78

z2 = (9.1 - 8) / 0.9

z2 = 1.11

Using a standard normal distribution table or calculator, we find the area to the left of z1 is approximately 0.2177 and the area to the left of z2 is approximately 0.8665. Therefore, the area between z1 and z2 is

0.8665 - 0.2177 = 0.6488

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Answer:

Step-by-step explanation:

-9x^2-36x-45