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Answer:
5 seconds it will hit the water.
Step-by-step explanation:
y=-16t²+400
add -16t² to both sides
-16t²=-400
divide both sides by 16
t²=-25
t=√25
t=5
I might be wrong but I think it is 50 .
Answer:
+ 12
Step-by-step explanation:
8 - (- 4) = 8 + 4 = 12
6 with the remainer of 4.