Write the explicit formula for the geometric sequence of the height of the ball on the
nth bounce. Use the formula a, = a, .-1. Remember that the 1st term, ay, is the
height of the ball on the first bounce. (2 points)

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

step-by-step explanation:

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.