Im probably wrong but i think you would do -4 - 7 + 3 = -8
The astroid is 100,000,000 miles away.
It's traveling at a speed of 100,000 miles per day.
100,000,000 ÷ 100,000 = 1,000
1,000 days.
Since a fraction is a form of division, you do 21/2=10 and 1/2.
A = 15000(1.04)6 .........You can put this into your calculator such that it becomes
A = $18,979.79
