Help!!

Cheetahs can accelerate to a speed of 20.0 m/s in 2.50 s and can continue to accelerate to reach a top speed of 29.7 m/s. Assume the acceleration is constant until the top speed is reached and is zero thereafter. Let the +x-direction point in the direction the cheetah runs. Express the cheetah's top speed vtop in miles per hour (mi/h) . Utop mi/h Starting from a crouched position, how much time accel does it take a cheetah to reach its top speed, and what distance d does it travel in that time? accel d = m If a cheetah sees a rabbit 129.0 m away, how much time total will it take to reach the rabbit, assuming the rabbit does not move and the cheetah starts from rest? total =