# An automobile rolls down an incline, traveling #s(t) = 6t^2 + 3# feet in #t# seconds. What is the velocity at #t = 2#, and after how many seconds will the velocity be #30# #f##/##sec#?

##### 1 Answer

Dec 4, 2015

#### Answer:

#### Explanation:

(a)

To find the velocity at a given instant we need to find the 1st derivative:

So when

(b)

When