A car traveling east slows down from a speed of 12 m/s to 5.4 m/s in 6 seconds. The magnitude of the car's acceleration is _____

Answer 1

a = (v₂ - v₁) / t

v₁ = 12 m/s

v₂ = 5.4 m/s

t = 6 s

Plug in the numbers and get a. The magnitude is just |a|.