The distance travelled by a car after $t$ seconds is $s=t^2+4t$ metres. Find its average speed f

Question

The distance travelled by a car after $t$ seconds is $s=t^2+4t$ metres. Find its average speed from $t=2$ to $t=5$, then its instantaneous speed at $t=5$ using the gradient function.[4]

Accepted Answer

Average speed: $11\text{ m/s}$; Instantaneous speed: $14\text{ m/s}$

Functions and Graphs

Functions and Graphs

Solution:

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