Answer:
a
Step-by-step explanation:
youre welcome
Answer:
$10356,22
Step-by-step explanation:
15500*(1-(6,5/100))^6=10356,22
The ball's velocity will be represented by the derivative of its distance function:

Now find the times

for which this is equal to 30, i.e. solve

This has two solutions,

, but only one is positive and falls in the interval
![[0,3]](https://tex.z-dn.net/?f=%5B0%2C3%5D)
. So the velocity reaches 30 cm/s when

.