The height of an object is represented by the function h(t) = 400 - 16t2, where 400 represents the initial height in feet from which the object is dropped and 1 represents the elapsed time in seconds. How many seconds will it take for the object to hit the ground?
O 20 seconds

use formula for the circle a=3.14

step-by-step explanation:

c.

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus