Darryl Dixon shoots an arrow at a zombie. The path of the arrow can be modeled with the equation y=-x^2 42x-80, where x is time in seconds and y is the height in feet. How long does it take for the arrow to reach its maximum?

We need to find time taken to reach arrow to its maximum.

The path of the arrow can be modeled with the equation .

Differentiating the given equation w.r.t x and equate it to zero.

Putting value of x = 21 sec in given equation, we get :

Therefore, time taken to reach maximum height is 21 seconds.

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation:

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.