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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dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

a c

step-by-step explanation: