How much time will you have to chop the tree down if you are given nine hours to chop a tree down and use six hours to sharpen your axe?

Answer 1

Assuming that you mean that you use 6 of the 9 hours given to sharpen your axe, then:

time left to chop down tree = time given - time used to sharpen axe

= 9 hours - 6 hours = 3 hours left in which to do the chopping.

Answer 2

To find the amount of time you have to chop the tree down after sharpening your axe, subtract the time it took to sharpen your axe from the total amount of time you have.

9 hours - 6 hours = 3 hours to chop the tree down.