A basketball bounces off the ground. The ball's height y (in feet) after t seconds can be modeled by y=-16t^2+20t. How many seconds is the ball in the air?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Based on the figures as marked, /\rqs = —

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean