Rewrite the following without an exponent

The fraction 8/5 is raised to the power -1. If a fraction is raised to a negative power, its reciprocal will be having the positive power.

For example in case of , it can be written as . i.e. to remove the exponent -1 we simply take the reciprocal.

So for given expression the reciprocal will be 5/8

Therefore,

A parabola opens downward with vertex at (1,20)

Step-by-step explanation:

The function that models the height of bag of candies is

The graph of this function is a parabola that opens downward.

To find the maximum height of the candy bag, we complete the squares to obtain the vertex form of the function.

Factor -16 to get;

Add and subtract the square of half the coefficient of t.

Factor the perfect square trinomial:

The vertex is (1,20)

This means the maximum height after 1 second is 20 feet.