The distance an rc car has traveled during the first 5 seconds of a race can be found using the function where d(t) is the distance of the car (in meters) and t is the number of seconds.

2. what is the average speed of the car for the first 2 seconds of the race?

a
7.5 m/s
b
10.3 m/s
c
12.8 m/s
d
18 m/s