The value of "t" for which the rocket's height is 39 feet are 14.59sec
Maximum Height reached
Given the expression for the height expressed as:
If the rocket's height is 39 feet, the expression becomes:
[tex]39=113t-16t^2[/tex]
Rewrite the expression
[tex]39=113t-16t^2\\16t^2-113t + 39 = 0[/tex]
t = 113±√(-113)²-4(16)(39)/32
t = 113±√12,7690-2,496/32
t = 113±353.82/32
t = 14.59sec
Factorize the result
The value of "t" for which the rocket's height is 39 feet are 14.59sec
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