Make a conjecture about the number of units produce in 50 hours

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false

Alawnmower blade has a diameter of 36 inches and spins at a rate of 60 revolutions per minute. what is the linear velocity, in inches per minute, at the end of the blade?