The function j(x)=39x represents the number of the jumping jacks j(x) you can do in x minutes how many jumping jacks can you do in 5 minutes

Step-by-step explanation:

Let

x------> the time in minutes

j(x)----> the number of the jumping jacks

we have

This is a linear direct variation

The slope is equal to

To find how many jumping jacks can you do in minutes

Substitute the value of in the function j(x)

so

Area of the dome is given by:
A=1/2(4πr²)=2πr²
thus:
A=2×3.14×(9/2)²
A=127.17 ft²
Thus the remaining area to be painted will be:
127.17-105
=22.17 ft²

Amount of paint required will be:
22.17/105*1=0.211 gallons
Thus the best approximation is:

A] 1 quart covers 26.25 ft²