-16t^2+400=0
16t^2=400
take square root on both sides.
4t=20
t=20/4
t=5
Devon writes a number pattern. He starts with 3 and follows the rule “multiply by
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-16t^2+400=0
16t^2=400
take square root on both sides.
4t=20
t=20/4
t=5