Use the definition of the derivative: 1) to find an expressionfor the instantaneous velocity of an object moving with rectlinear motion according to the given function relating s (in m) and t (in s). Then 2)calculate the instantaneous velocity for the given value of t.

s=8t+15; t=2

options:

1)23

2)31

1)15

2)16

1)8

2)8

1)8

2)31