16-10-2016
Mathematics

contestada

A baseball is dropped from a stadium seat that is 73 feet above the ground. Its height s in feet after t seconds is given by s(t)=73−16t^2. Estimate how long it takes for the baseball to strike the ground.

Respuesta :

16-10-2016

0 = 73 - 16t^2
16t^2 = 73
4^2*t^2 = 73
(4t)^2 = 73
sqrt(4t^2) = sqrt(73)
4t = 8.5440
t = 2.136
ANSWER: 2.1 seconds

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