A ball is thrown upward from the top of a building 320 feet tall. The height, h, of the ball t seconds after being thrown is given by the equation h = –16t2 + 16t + 320. After how many seconds will the ball hit the ground?
A) 1
B) 4
C) 5
D) 20

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step-by-step explanation: vsfdvsfvd

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)