Answer:
I do believe that the answer is 25 cents per inch
A perfect square is when a trinomial can be factored into a binomial multiplied by itself right? If that's the case then I think b=8
x^2-8x+16
x^2-2×x×4+4^2
(x-4)^2
To answer this question you basically have to add up day 1, day 2 and day three then take it away from 30 so.....
7.7+6.4+8.0=22.1
30-22.1=7.9 so they have 7.9 miles left to walk
5 times 3 equals 15 so they gained 15 yards. 12 times 2 equals 24. 24 minis 15 equals 9. So the answer in 9 yards
Circumference = 2 * pi * radius
So, radius = circumference / (2 * pi)