The circumference of a tire is 96 determine the radius of tire use 3

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Anyone know? will mark brainliest if you're correct!

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )