Marcus and 3 friends collected $1,548 for charity and will give the same amount to 18 different groups.    how much money will each group get?   a. $516   b. $387   c. $172   d. $86

For this case we have the following variables:

x: total amount collected

y: number of groups

The relationship between the variables is given by:

Substituting values we have:

Making the corresponding calculation:

each group will get about:

D. $86

When the ball hit the ground, the height of the ball will be zero. So using the value of h(x) as zero in the given equation, we can find the time in which the ball will hit the ground.

0 = -(x-2)^2 + 16

(x-2)^2 = 16

x-2 = 16

x-2 = 4

x = 6

This means the ball will hit the ground 6 seconds after Amir threw it.