Newest Math Questions | Wyzant Ask An Expert

12/05/23

z-Scores and Area under the Curve

z-Scores and Area under the Curve A researcher collected data on adults using an intelligence test. The data for these adults were approximately normally distributed with the following mean and... more

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Math Calculus

12/05/23

How fast is the distance between the runners changing 1 second after the ball was hit?

You are watching a baseball game. Runners are standing at first and second base. The moment the batter hits the ball, the runner in first base runs to second base 18 feet per second. The runner at... more

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Math Calculus

12/05/23

If the balloon continues to go up 10 feet per second, how fast is the distance between the motorcycle and the balloon changing 10 seconds later?

A hot air balloon is 150 ft above the ground while a motorcycle passes directly beneath it heading North at a speed of 40 miles per hour also known as 58.67 feet per second. If the balloon... more

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Math

12/05/23

write a linear equation

passes through (4,-1), slope =-3

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Math

12/05/23

A 1-year loan with a 5% APR will have the most interest charged with what type of compounding?

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Math Calculus

12/05/23

Understanding Derivatives

y = cos4(7x3)step 1 dy/dx = 4cos3(7x3)(-sin(7x3))*21x2step 2 = -84x2cos3(7x3)sin(7x3)step 3 = -42x2sin(14x3)cos2(7x3)Could someone explain how they went from step 2 to step 3?Edit: I understand it... more

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Math Algebra 1

12/05/23

The Normal Distribution

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 6.9 days and standard deviation of 1.7 days. Use your graphing calculator to answer the... more

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Math Algebra 1

12/05/23

The Normal Distribution

Use the normalCDF function on your graphing calculator to determine the area of the shaded region shown below.47535965717783Exam Scores[Graphs generated by this script:... more

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Math

12/05/23

what is the slope of (-6,9),(7,-9)

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Math

12/04/23

1/8 times 9 equals what

I need to know what the answer is

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Math

12/04/23

In planning her retirement, Liza deposits some money at 1.5% interest, with twice as much deposited at 5%. Find the amount deposited at each rate if the total annual interest income is $1380.

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Math

12/04/23

How many quarts of pure antifreeze must be added to 2 quarts of a 50% antifreeze solution to obtain a 60% antifreeze solution?

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Math

12/04/23

Jane took 15 min to drive her boat upstream to water-ski at her favorite spot. Coming back later in the day, at the same boat speed, took her 5 min. If the current in that part of the river is 8km

Jane took 15 min to drive her boat upstream to water-ski at her favorite spot. Coming back later in the day, at the same boat speed, took her 5 min. If the current in that part of the river is ... more

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Math

12/04/23

How many gallons of a 60% antifreeze solution must be mixed with 60 gallons of 20% antifreeze to get a mixture that is 50% antifreeze?

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Math

12/04/23

x intercepts of (x+6)²-7

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Math

12/04/23

Where do they meet?

Sue begins counting backwards from 1298 by 4's saying one number every 5 seconds. At the same time Jim begins counting forward from 171 by 3's, saying one number every 5 seconds. What number will... more

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Math

12/04/23

Unit Vector Question

Find the unit vector that has the same direction as the vector v. v=-24i-7j

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Math Algebra 1

12/04/23

What is the slope and y-intercept for this chart?

X Y-2. -5-1. -10. 31. 72. 11

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Math

12/04/23

Math Conversion

Practice: You need 60 lbs of washed broccoli which costs $1.86 per lb and broccoli has a 75% yield. What is the EPC?

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Math

12/04/23

solve and create a word problem for 2 3/4 divided by 1/3

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Math Algebra 1

12/04/23

The Normal Distribution

A variable x� is normally distributed with mean 15 and standard deviation 8.Round your answers to the nearest hundredth as needed.a) Determine the z�-score for x=19�=19.z=�=b) Determine... more

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Math Algebra 1

12/04/23

The Normal Distribution

A set of 1500 exam scores is normally distributed with a mean = 84 and standard deviation = 9.Use the Empirical Rule to complete the statements below. How many students scored higher than 84? How... more

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Math Algebra 1

12/04/23

The Normal Distribution

The weights for newborn babies is approximately normally distributed with a mean of 6.1 pounds and a standard deviation of 1.9 pounds.Consider a group of 800 newborn babies:1. How many would you... more

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Math Calculus

12/04/23

Find the area of the region bounded by the graphs of the given curves

y=x^3/2 and y=(x^2)/32

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Answers •2

Math Calculus

12/04/23

Find the area of the region bounded by the graphs of the given curves

y=x^3/2 and y=x^2/32

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Answers •1

z-Scores and Area under the Curve

How fast is the distance between the runners changing 1 second after the ball was hit?

If the balloon continues to go up 10 feet per second, how fast is the distance between the motorcycle and the balloon changing 10 seconds later?

write a linear equation

A 1-year loan with a 5% APR will have the most interest charged with what type of compounding?

Understanding Derivatives

The Normal Distribution

The Normal Distribution

what is the slope of (-6,9),(7,-9)

1/8 times 9 equals what

In planning her​ retirement, Liza deposits some money at ​1.5% ​interest, with twice as much deposited at ​5%. Find the amount deposited at each rate if the total annual interest income is ​$1380.

How many quarts of pure antifreeze must be added to 2 quarts of a 50​% antifreeze solution to obtain a ​60% antifreeze​ solution?

Jane took 15 min to drive her boat upstream to​ water-ski at her favorite spot. Coming back later in the​ day, at the same boat​ speed, took her 5 min. If the current in that part of the river is 8km

How many gallons of a ​60% antifreeze solution must be mixed with 60 gallons of ​20% antifreeze to get a mixture that is 50​% ​antifreeze?

x intercepts of (x+6)²-7

Where do they meet?

Unit Vector Question

What is the slope and y-intercept for this chart?

Math Conversion

solve and create a word problem for 2 3/4 divided by 1/3

The Normal Distribution

The Normal Distribution

The Normal Distribution

Find the area of the region bounded by the graphs of the given curves

Find the area of the region bounded by the graphs of the given curves

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In planning her retirement, Liza deposits some money at 1.5% interest, with twice as much deposited at 5%. Find the amount deposited at each rate if the total annual interest income is $1380.

How many quarts of pure antifreeze must be added to 2 quarts of a 50% antifreeze solution to obtain a 60% antifreeze solution?

Jane took 15 min to drive her boat upstream to water-ski at her favorite spot. Coming back later in the day, at the same boat speed, took her 5 min. If the current in that part of the river is 8km

How many gallons of a 60% antifreeze solution must be mixed with 60 gallons of 20% antifreeze to get a mixture that is 50% antifreeze?