Question

help

Answer 1

what would you like help with?

Answer 2

whatcha need help with ward?

Answer 3

what do you think the answer is

Answer 4

they give you the formula a = (v-u)/t

where v is the final velocity, u is the initial velocity, and t is time

the car starts at 20 m/s, so this is the initial velocity
10 m/s is the final velocity
t is time (5s)

plug in the appropriate quantities and solve