Answer:
<h2>
<em><u>Answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>1</u></em><em><u>.</u></em><em><u>1</u></em><em><u>.</u></em><em><u> </u></em></h2>
<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>helps</u></em><em><u> </u></em><em><u>you</u></em>
7.158 * 10^9 rounds to 7 * 10^9
7 * 10^9 = 7,000,000,000
A. The discount is 7.80 much
B. $11.7
A. ratio of areas = 2^2 /5^2 = 4/25
B 14^2 : 1 = 196:1
C. ratio of perimeters would be sqrt81 = 9 times