Question

Quick QUESTION!

A ball is dropped from a certain height. The function below represents the height f(n), in feet, to which the ball bounces at the nth bounce:

f(n) = 9(0.7)^n

What does the number 0.3 represent?

Answer 1

(A) The ball bounces to 30% of its previous height with each bounce
(B) The height at which the ball bounces at the nth bounce is 0.3 feet
(C) The ball bounces to 70% of its previous height with each bounce
(D) The height from which the ball was dropped at the nth bounce is 0.7 feet

Answer 2

@jim_thompson5910 This is a quick question. Is the answer A?

Answer 3

I don't see 0.3 in f(n) = 9(0.7)^n

Answer 4

Yeah me neither. But could it be A though? Since this is decreasing, it would be by 30%

Answer 5

when n = 0, what is f(n)

Answer 6

9

Answer 7

and when n = 1, f(n) = ??

Answer 8

6.3

Answer 9

so what change happened from 9 to 6.3

Answer 10

70%

Answer 11

you took 70% of 9, yes

Answer 12

right

Answer 13

that means each next height is 70% of the previous height

Answer 14

which is why I'm thinking they meant to say 0.7 instead of 0.3

Answer 15

Oh ok! Thank you! It was probably a typo

Answer 16

yeah if it said "the ball loses 30% of its height each bounce", then it would work

Answer 17

since 100% - 30% = 70%