13,000 because 9 rounds 2 to 3
<span>The sum of two irrational numbers, in some cases, will be irrational. However, if the irrational parts of the numbers have a zero sum (cancel each other out), the sum will be rational. "The product of two irrational numbers is SOMETIMES irrational."</span> Hope That Helps
Eg 10 miles,
A: 85+0.1*10=86
B:40+0.2*10=42
eg 100 miles
A: 85+0.1*100=95
B:40+0.2*100=60
eg 450 miles
A: 85+0.1*450=130
B:40+0.2*450=130
so for it to cost less to rent from agency A, m has to be bigger than 450 miles