A bottle rocket is launched from a platform. The function h(t) = 2+90t-16t^2 models the height ( in feet ) after t seconds.

a) What is the maximum height the rocket reaches?

b) How many seconds does it take to reach the maximum height?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed