For the numeric part, you'll have to find the GCD of 15 and 25, which is 5. So, we can factor a 5 and we have
As for the literal part, you can factor because it's the power of s with the smallest denominator. So, we have
1 foot = 12 inches.
Multiply 2.5 feet by 12 inches for total inches:
2.5 * 12 = 30 total inches.
Multiply 30 inches by 2.5 miles for total miles:
30 * 2.5 = 75 miles total.
10^2+14^2=296
Square root of 296
17.20