Answer:
t=11 sec
Step-by-step explanation:
The position of the particle moving along the x-axis is given by:

The velocity is given by:

If s'(t)>0 then the particle is moving right.


This means that the particle is moving left when

The particle changes direction at time t=1 or t=11
Answer:
The answer is B

Step-by-step explanation:


Answer:
A) -32/21
Step-by-step explanation:
Answer:
a
Step-by-step explanation: