8. A ball is thrown into the air with an upward velocity of 128 ft/s. Its height, h, after t seconds is given by the function h = -16t?+128t+320. How many seconds
did it take for the ball to reach its maximum height?
10 Seconds
O
4 Seconds
O 486 Seconds
O 2 seconds

Volume of a cylinder with a radius of 13 in and height of 30 in

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft