The Empire State Building is 1890 feet tall. If an object is thrown upward from the top of the building, its height t seconds after it is thrown is given by the equation
h(t)=-16t2+38t+1890. At what time did he object reach its maximum height.

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step-by-step explanation:

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e