well, i believe the answer is each dollar= 1.6 pounds
<span> When raising an number to zero power you will always get 1. you raise both the numerator and the denominator</span>
We can think of this as an equality
5 Lawns = 8 Hours
If she needs 40 hours, you can multiply 8 hours by 5 to get 40, but now it's not balanced. So, you need to multiply 5 to the other side too so:
5 x (5) = 8 x (5)
Therefore she mows 25 Lawns in 40 Hours
