What is the prime factorization of 5423?

Evaluate cos2θ for cosθ = square root of 3/2

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.