Let's add the fractions first and then we can estimate the sum.
[tex]= \dfrac{2}{3} +\dfrac{3}{4}[/tex]
change to common denominators
[tex]= \dfrac{8}{12} +\dfrac{9}{12}[/tex]
add numerators only
[tex]\dfrac{17}{12}[/tex] or [tex]1\dfrac{5}{12}[/tex] or [tex]1.42[/tex]
ANSWER: 13 is the best estimate of the answer. Normally we round up to 1.4 with a number like 1.42, but since that is not a choice, we can estimate 1 as the answer.
The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117 and standard deviation of 22 .
Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.
a. Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places.
b.
b. If you sampled 2000 people, how many would you expect to have BP> 160? Give your answer to the nearest person. Note: I had a bit of an issue encoding rounded answers, so try rounding both up and down if there's an issue!
C. Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1? d. Your doctor tells you you are in the 30th percentile for blood pressure among US adults. What is your systolic BP? Round to 2 decimal places.
According to the question we can say that the area to the right of z = 2.00 is 0.0228 or 2.28%.
a. To find the percentage of adults in the USA with stage 2 high blood pressure, we need to find the area under the normal distribution curve to the right of 160.
Using a standard normal distribution table or a statistical software, we can find that the z-score corresponding to 160 systolic blood pressure is:
z = (160 - 117) / 22 = 2.00
The area to the right of z = 2.00 is 0.0228 or 2.28%. Therefore, around 2.28% of adults in the USA have stage 2 high blood pressure.
b. To find how many people out of a sample of 2000 would be expected to have systolic blood pressure greater than 160, we can use the same z-score from part (a) and the standard normal distribution formula:
z = (x - μ) / σ
Rearranging the formula to solve for x, we get:
x = z * σ + μ
Substituting the values, we get:
x = 2.00 * 22 + 117 = 161.4
So the expected number of people with systolic blood pressure greater than 160 out of a sample of 2000 is:
2000 * (1 - P(Z < 2.00)) = 2000 * (1 - 0.9772) = 45.6
Rounding up, we can expect about 46 people to have systolic blood pressure greater than 160 out of a sample of 2000.
c. To find the percentage of adults in the USA who qualify for stage 1 high blood pressure, we need to find the area under the normal distribution curve between 140 and 160.
Using the standard normal distribution formula and z-scores, we get:
z1 = (140 - 117) / 22 = 1.05
z2 = (160 - 117) / 22 = 1.95
Using a standard normal distribution table or a statistical software, we can find the area to the left of z1 and z2, and then subtract the two areas to get the area between z1 and z2:
P(z1 < Z < z2) = P(Z < z2) - P(Z < z1) = 0.9744 - 0.8531 = 0.1213
Therefore, approximately 12.13% of adults in the USA qualify for stage 1 high blood pressure.
d. To find the systolic blood pressure corresponding to the 30th percentile, we need to find the z-score that has an area of 0.30 to its left.
Using a standard normal distribution table or a statistical software, we can find the z-score that corresponds to the area 0.30:
z = -0.52
Using the standard normal distribution formula and the given mean and standard deviation, we can solve for the systolic blood pressure:
x = z * σ + μ = -0.52 * 22 + 117 = 105.16
Therefore, if you are in the 30th percentile for blood pressure among US adults, your systolic blood pressure is approximately 105.16.
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let f(x)=2x^2+16x+33.
by completing the square write f(x)=a(x-h)^2+k
Step-by-step explanation:
use the formula for completing the square
A car was purchased for $16,000. Each year since, the resale value has decreased by 26%.
Let t be the number of years since the purchase. Let y be the resale value of the car, in dollars.
Write an exponential function showing the relationship between y and t.
Answer:
y = 16000(0.86)^t
Step-by-step explanation:
y = 16000(0.86)^t
42,000 divided by 10'3 (ASAP)
Answer:407.7669
Step-by-step explanation:
Find the measure of arc AD. Arc AD =
The length of the arc AD is approximately 5.24 cm.
What is the length of an arc in circle?
Length of arc = (angle of arc / 360°) x (circumference of circle)
Here, the angle of arc is given as 60° and the radius of the circle is given as 5 cm.
So, the circumference of the circle can be found as:
circumference of circle
[tex]= 2 \times π \times radius \\ = 2 \times π \times 5 \\ = 10π cm[/tex]
Using the formula for length of arc, we can find the length of AD as
length of AD = (angle of arc / 360°) x (circumference of circle)
= (60° / 360°) x (10π cm)
= (1/6) x (10π cm)
= (5/3)π cm
≈ 5.24 cm
Therefore, the length of the arc AD is approximately 5.24 cm.
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Correct question is "There is a circle with centre O and AD is an arc. Now radius of the circle is 5 cm and angle of arc is 60° then what is the length of the arc AD ?"
The seats available to a baseball game come in four types: bleacher, box, club, and grandstand. There are 12,600 box seats and 5,400 club seats available. According to the graph, what is the total number of seats available?
The total number of seats available for the baseball game can be calculated by adding the number of box and club seats available whch is found to be 25,200.
What is the game of baseball?The game of baseball can be used to teach various mathematical concepts, such as probability, statistics, graphing, estimation, and basic arithmetic. The game can also be used to introduce concepts such as geometry and trigonometry, as well as to build problem-solving skills.
The total number of seats available can be calculated by adding the number of box and club seats available, which is
12,600 + 5400 = 18,000.
This total can then be multiplied by the respective percentages of the other two categories to get the total number of seats available.
For instance, the total number of bleacher seats available can be calculated by multiplying 12,000 by 18%.
12,000 x 0.18 = 2,160
Similarly, the total number of grandstand seats available can be calculated by multiplying 12,000 by 42%.
12,000 x 0.42 = 5,040
Hence, the total number of seats available for the baseball game is
18,000 + 2,160 + 5,040 = 25,200.
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FOREIGN LANGUAGE Christy surveyed several students at her school and asked each person what foreign language he or she is studying. The results are shown in the table.
Male Female Totals
Spanish 18 20 38
French 16 12 28
German 6 8 14
Totals 40 40 80
The total number of students Surveyed was 160, with 56 studying French and 104 studying Language X.
Assuming that there are only two foreign languages in the survey, French and another language (let's call it Language X), we can proceed with the given data.
French: 16, 12, 28
Totals: 40, 40, 80
Step 1: Analyze the given data.
The given data shows that there are three groups of students who are studying French:
- Group 1: 16 students
- Group 2: 12 students
- Group 3: 28 students
The total number of students in each group is:
- Group 1: 40 students
- Group 2: 40 students
- Group 3: 80 students
Step 2: Calculate the number of students studying Language X.
To determine the number of students studying Language X in each group, subtract the number of students studying French from the total number of students in each group:
- Group 1: 40 - 16 = 24 students
- Group 2: 40 - 12 = 28 students
- Group 3: 80 - 28 = 52 students
Step 3: Summarize the results.
In summary, the survey conducted by Christy found the following results:
- French: 16 students in Group 1, 12 students in Group 2, and 28 students in Group 3
- Language X: 24 students in Group 1, 28 students in Group 2, and 52 students in Group 3
The total number of students surveyed was 160, with 56 studying French and 104 studying Language X.
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Hurry!!!! Tyra wrote the equation at the right.
a. Give a possible value for x and y that would make the equation true.
b. If the value of y is 12, what is the value of x?
XYZ + 8P = 11
please help
Answer:
y=(11-8p)xz
Step-by-step explanation:
xyz+8p=11
xyz=11-8p
y=(11-8p)xz
WHOEVER CAN DO ALL OF THIS GEOMETREY TRIG I WILL GIVE 245 points and brainliest to
Answer: I can help you!
Step-by-step explanation:
Answer and explanations
A line passes through the point (-8,7) and has a slope of 3/2.
Write an equation in slope-intercept form for this line.
The equation in slope-intercept form for the line that passes through the point (-8,7) and has a slope of 3/2 is y = (3/2)x + 19.
Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 5 cubic feet per minute. If the pool has radius 7 feet and height 8 feet, what is the rate of change of the height of the water in the pool when the depth of the water in the pool is 5 feet?
Since this is a right circular cylinder, the 8-feet height is irrelevant because we should expect the water's height to rise at a steady rate of 0.032481 feet/min.
What is constant rate?When the ratio of the output to the input remains constant at any particular point along the function, the rate of change is said to be constant.
The slope is another name for the steady rate of change.
The height of 8 feet is unimportant because, because this is a right circular cylinder, we should anticipate that the height of the water will increase at a constant rate.
[tex]V=\pi*r^2*h\\\\V=\pi*7^2*h\\\\V=\pi*49h\\\\\frac{dV}{dh} =49\ \pi \\\\\frac{dV}{dt}*\frac{dt}{dh}=49\ \pi \\\\5*\frac{dt}{dh} =49\pi\\\\\frac{dt}{dh} =\frac{49}{\frac{\pi}{5} } \\\\\frac{dt}{dh} =\frac{5}{\frac{49}{\pi} } \\\\\frac{dt}{dh} = 0.032481\ feet/min[/tex]
Since this is a right circular cylinder, the 8-feet height is irrelevant because we should expect the water's height to rise at a steady rate of 0.032481 feet/min.
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the equation of a circle centered at the origin x^2 + y^2 = 64. what is the radius of the circle?
Answer:
r = 8 units
Step-by-step explanation:
The equation of the circle centered at the origin is x² + y² = r²
x² + y² = 64
x² + y² = 8²
r = 8 units
Answer:
8
Step-by-step explanation:
An equation of a circle is depicted by the notation [tex](x-h)^2+(y-k)^2=r^2[/tex], where
- [tex](h,k)[/tex] is the center point of the circle
- [tex]r[/tex] is the radius (the span of units from the origin to the border of the circle)
In this unique problem, the center is the origin (0,0), so [tex]h[/tex] and [tex]k[/tex] respectively equal 0.
Since the equation of the circle is [tex]x^2+y^2=64[/tex] , we must square root 64 since it's in it's [tex]r^2[/tex] form to obtain the value of [tex]r[/tex], which is the radius.
[tex]\sqrt{64}[/tex]=±8
Despite mathematically, -8 or 8 will work in this case, you cannot have a negative radius; therefore, the radius of the circle is 8.
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Create an equation:
The f(x) is a rational function that has a limit as x approaches 2 but fails to be continuous there because f(2) is undefined.
Solve the equation for exact solutions over the interval [0, 2pi). sin²x + sin x = 0
Answer:
0; п; 1,5п; 2п.
Step-by-step explanation:
all the details are provided in the attachment.
In a marriage ceremony of Pemba's daughter, he has to make arrangement for accommodation of 150 persons. For this purpose he plans to build a conical tent in such a way that each person has 4 sq.m. of the space on ground and 20 cu.m. of air to breadth. What should be the height of the tent? Find it.
Answer:
This is the answer of that question
Junior Saans obtained a $3,275 loan at 7.5% for 24 months. His monthly payment on the loan is $147.37. After 8 payments, the balance on the loan is $2,237.27. If he pays off the loan when the next payment is duc, what is the final payment? Step I Find the previous balance. Step 2 Find the interest for the 9th month. Step 3. Find the final payment.
Answer:
Step 1: Find the previous balance.
After 8 payments, the remaining balance on the loan is $2,237.27. Therefore, the previous balance would be the balance before the 8th payment.
Total number of payments = 24
Number of payments already made = 8
Number of payments remaining = 24 - 8 = 16
Using the given monthly payment, we can find the balance before the 8th payment:
PV = PMT x [(1 - (1 + r/n)^-n*t)/(r/n)]
where PV is the present value or previous balance, PMT is the monthly payment, r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the time period in years.
Plugging in the given values, we get:
PV = $147.37 x [(1 - (1 + 0.075/12)^(-12*2))/(0.075/12)]
PV = $3,090.60
Therefore, the previous balance was $3,090.60.
Step 2: Find the interest for the 9th month.
We know that the balance at the end of the 8th month was $2,237.27. We can use this and the given interest rate to find the interest for the 9th month.
Interest = Balance x (Annual interest rate/12)
Interest = $2,237.27 x (0.075/12)
Interest = $13.99
Step 3: Find the final payment.
To find the final payment, we need to add the interest for the 9th month to the monthly payment and subtract it from the remaining balance.
Final payment = Remaining balance + Interest for 9th month - Monthly payment
Final payment = $2,237.27 + $13.99 - $147.37
Final payment = $2,103.89
Therefore, the final payment is $2,103.89.
Hope This Helps!
I’m terrible with this stuff please help
As, a1/a2 = b1/b2 = c1/c2 = 2 .Thus, the given system of equations forms the identical lines.
Explain about the solution of system of equations:A list of numbers x, y, z, etc. that simultaneously make all of the equations true is the solution of a system of equations. A system of equations' solution set is the whole of all possible answers. Finding all answers using formulas containing a certain number of parameters is known as solving the system.
For the given system of equations:
6x - y - 2 = 0
here, coefficients a1 = 6, b1 = -1 and constant c1 = -2
Now,
3x - 1/2y - 1 = 0
here, coefficients a2 = 3, b2 = -1/2 and constant c2 = -1
taking the ratios:
a1/a2 = 6/3 = 2
b1/b2 = -1/(-1/2) = 2
c1/c2 = -2/(-1) = 2
As, a1/a2 = b1/b2 = c1/c2 = 2 .Thus, the given system of equations forms the identical lines.
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Ayudaaaa necesito sacar los límites!!!
Debido a restricciones de longitud, los límites de la función aparecen descritos en la explicación de esta pregunta.
¿Cómo determinar los limites de una función?
En este problema debemos determinar los límites de un punto y los límites laterales de la función. El limite de un punto se determina mediante la evaluación directa de la función, mientras los límites laterales de la función se determinan viendo a que valor tiende la función.
A continuación, determinamos los límites de las funciones:
Caso 1:
Subcaso A (x = 1)
f(x) = - 1
Subcaso B (x = 5)
f(x) = 1
Subcaso C (x = 3⁻)
f(x) → - ∞
Subcaso D (x = 3⁺)
f(x) → + ∞
Subcaso E (x = 3)
No existe
Case 2:
Subcaso A (x = 0)
f(x) = 0
Subcaso B (x = - 2)
f(x) = 0.5
Subcaso C (x = 3⁻)
f(x) → - ∞
Subcaso D (x = - 3⁺)
f(x) → + ∞
Subcaso E (x = - 3)
No existe
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An item cost $310 before tax, and the sales tax is$6.20. Find the sales tax rate. Write your answer as a percentage.
Answer:
2%
Step-by-step explanation:
(sales tax/ cost before tax) x 100%
(6.20 ÷ 310) x 100
0.02 x 100%
= 2
so the answer is 2%
Which points in the scatter plot are outliers?
Select each correct answer.
Point A
Point F
Point H
Point K,
Point M
Point K and F
Looking at the data, you can see that most of the data points form close to a line- if you were to draw a line of best fit through the data, you would see that it would be quite close to most points on the graph. This is the trend of the graph, it is linear.
However, you can see thaf K and F do not come close to this trend at all and are therefore outliers since they do not fall close to the line.
Find the lateral surface area of the prism
The lateral surface area of the triangular prism is 275.5 sq. mm.
What is lateral surface area?"Being to the side" is the definition of the term "lateral." A triangular prism's lateral area is equal to the sum of its side faces' areas (which are 3 rectangles). Specifically, it is the total surface area less the surface areas of the two bases. Also called the lateral surface area (LSA). Due to the two dimensions involved in its calculation, we measure it in square units.
The lateral surface area of the triangular prism is given as:
LSA = (a + b + c)h
Here, the value of a = 7.5, b = 10.5, and c = 11mm, and h = 9.5mm.
Substitute the values:
LSA = (7.5 + 10.5 + 11) (9.5)
LSA = 275.5 sq. mm
Hence, the lateral surface area of the triangular prism is 275.5 sq. mm.
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Armando kicks a football into the air. The function (x)--5x^2 + 39x + 0.24 models the height of the football from the ground, in feet, with respect to the time x in seconds. Use a graph or table to estimate
the time for the ball to return to the ground after being kicked
The graph of the quadratic function is on the image at the end, there we can see that the ball takes 7.8 seconds to return to the ground.
How long will take the ball to return to the ground?We know that the height of the ball is modeled by the quadratic function:
h(x) = -5x² + 39x + 0.24
Where x represents the time in seconds.
To do this, we need to use a graph of the quadratic function, when we have the graph, we need to identify the zeros of the quadratic (when the height is zero, the ball is in the ground).
On the image at the end you can see the graph, there you can see that we have a zero at x = 7.8, it means that the ball takes 7.8 seconds to return to the ground.
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A boat heading out to sea starts out at Point A, at a horizontal distance of 1189 feet from a lighthouse/the shore. From that point, the boat’s crew measures the angle of elevation to the lighthouse’s beacon-light from that point to be 10∘ .At some later time, the crew measures the angle of elevation from point B to be 3 Find the distance from point A to point B. Round your answer to the nearest tenth of a foot if necessary.
The boat is 1189 feet away from the lighthouse at position A, and the angle between the boat and the beacon light is 10°. The distance between point A and point B is 2811.4 feet.
What's the difference between points A and B?The boat is 1189 feet away from the lighthouse at position A, and the angle between the boat and the beacon light is 10°.
As a result, if h is the lighthouse's height, we have:
tan 10 = h/1189
h = 1189.tan 10
h = 209.7 feet
The elevation angle at position B is 3°. The following equation provides the distance (d) from the lighthouse:
tan 3 = h/d
d = h/tan 3 = 4000.4 feet
Therefore, the distance between points A and B is 400.4 - 1189
= 2811.4 feet
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Insurance helps you transfer the
A. Risk
B. Money
C. Insurance
D. Health
from your bank account to the insurance company.
Generally, insurance helps the policyholder to transfer the A. Risk from their bank account to the insurance company.
What is insurance risk?Insurance risk refers to the exposure of a policyholder to financial loss and consequent inability to meet their liabilities.
Insurance risks are transferable to insurance companies who pool resources together from many policyholders to meet and spread the risks.
Insurance does not transfer money, insurance, or health to the insurance company, but it transfers risk.
Thus, the correct option is Option A.
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can you solve this question?
y'=?
The solution of given derivative of y = √(arctan(x)) is:
Y' = 1 / (2√arctan(x)(1 + x²))
What do you mean by Differentiate ?In general, the term "differentiate" means to distinguish or recognize the differences between two or more things or concepts.
In mathematics, differentiation refers to the process of finding the rate at which a function changes with respect to one of its variables. It is a fundamental concept in calculus and involves calculating the derivative of a function. The derivative gives us the slope of a tangent line to the curve of the function at a specific point
To differentiate Y = √arctan(x), we need to use the chain rule and the formula for differentiating the arctan function, which is:
d/dx arctan(x) = 1 / (1 + x²)
Using the chain rule, we have:
Y = √arctan(x)
Y = [tex](arctan(x))^(1/2)[/tex]
Y' =[tex](1/2)(arctan(x))^(-1/2) * d/dx (arctan(x))[/tex]
Y' = [tex](1/2)(arctan(x))^(-1/2) * (1 / (1 + x^{2} ))[/tex]
Putting it all together, we have:
Y' = (1 / 2√arctan(x)) * (1 / (1 + x²))
Simplifying the expression, we get:
Y' = 1 / (2√arctan(x)(1 + x²))
Therefore, the derivative of Y = √arctan(x) is:
Y' = 1 / (2√arctan(x)(1 + x²))
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where would it be located on a graph y=-3/3
Step-by-step explanation:
y= -3/3 is equivalent to -1
so y = -1
it located on the negative y-axis
where y= -1
Due to random variations in the operation of an automatic coffee machine, not every cup is filled with the same amount of coffee. Assume that the mean amount of coffee dispensed is 7 ounces and the standard deviation is 0.6 ounce. Use the 68-95-99.7 rule to complete the following.
68% of the data values will be within one standard deviation (0.6) of the mean.
95% of the data values will be within 2 standard deviations (1.2) of the mean.
99.7% of the data values will be within 3 standard deviations (1.8) of the mean.
What is the slope of a line that passes through the points (-2,4) and (-6,12)
A ship is 115 miles from one radio transmitter and 140 miles from another transmitter. If the angle between the signals is 132°, how far apart are the transmitters? Round to the nearest tenth.
The transmitters are approximately 115.1 miles apart.
How to find how far apart are the transmittersThis is a trigonometry problem that can be solved using the Law of Cosines.
We can use the law of cosines to solve this problem. Let's call the distance between the transmitters "d". Then we have:
d^2 = 115^2 + 140^2 - 2(115)(140)cos(132°)
d^2 = 13212.4
d ≈ 115.1 miles (rounded to the nearest tenth)
Therefore, the transmitters are approximately 115.1 miles apart
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