1) The height, h, in feet of a ball above the ground is given by h = -16t2 + 64t+ 80, where t is the time in seconds. How long does it take the ball to hit the ground? es A) 3 seconds B) 4 seconds 95 seconds D) 6 seconds

C) 5 seconds

Step-by-step explanation:

When the ball hits the ground, the height is 0.

Factor out the greatest common factor: 16

Find numbers whose sum is -5 and product is - 4.

Those numbers are - 5 and 1: - 5 × 1 = - 5, - 5 + 1 = - 4

Or

So,

Or

Since time cannot be a negative value the correct answer is 5 seconds.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons