- #1

Mspike6

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I have always had problems with Swquences and sum :S

A basketball is dropped from a height of 15 m and bounces to 70% of the previous height. The total distance the ball travels when it hits the ground for the ninth time is (give answer to the nearest tenth)

i know we probably going to use sn=a(1-2

and we going to use Tn-1 (0.70) ... but i really can't get it right.

A basketball is dropped from a height of 15 m and bounces to 70% of the previous height. The total distance the ball travels when it hits the ground for the ninth time is (give answer to the nearest tenth)

i know we probably going to use sn=a(1-2

^{n})/1-r somewhere.and we going to use Tn-1 (0.70) ... but i really can't get it right.

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