A volleyball is hit upward from a height of 4 feet at an initial speed of 20 feet per second. As the volleyball travels, Earth’s gravity slows it down. The height of an object dropped from a height of 4 feet is given by h(t)=−16t^2+4.

The distance in feet traveled by an object at a constant speed of 20 feet per second is given by d(t)=20t.

These two functions can be combined to build a new function, f, that models the height of the volleyball as a function of time in t seconds.

Which choice shows how to combine h and d to build f?

A. f(t)=h(t)−d(t)

f(t)=−16t^2−20t+4

B. f(t)=d(t)−h(t)

f(t)=16t^2+20t−4

C. f(t)=h(t)⋅d(t)

f(t)=(−16t^2+4)(20t)

D. f(t)=h(t)+d(t)

f(t)=−16t^2+20t+4

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?

Select the correct answer from each drop-down menu. the table shows the annual sales revenue for different types of automobiles from three automobile manufacturers. sales revenue (millions of dollars) suv sedan truck marginal total b & b motors 22 15 9 46 pluto cars 25 27 10 62 panther motors 26 34 12 72 marginal total 73 76 31 180 the company with the highest percentage of sales revenue from sedans is . of the annual sales revenue from suvs, the relative frequency of pluto cars is .

What is the circumference of the pie