Question

See attachment

Answer 1

you can derive the velocity function , then plug in t=10

Answer 2

I'm having problem with the derivative...I don't really it

Answer 3

get*

Answer 4

the derivative of a constant is 0, the derivatve of x^a is ax^a-1, apply this to your function

Answer 5

you should get s'(t)=72-(2)(0.83)t

Answer 6

then just plug in t=10

Answer 7

ok i got 55.4 for the first one...

Answer 8

yup

Answer 9

I just need to find out the second one...not sure on how to do it...

Answer 10

set the derivatve equal to zero to find the extrema, you are looking for the maximum

Answer 11

the answer would be around 80?

Answer 12

id try 43.37..

Answer 13

Still got it wrong... :)

Answer 14

hahhaha, did you get the first one right