What is the radius of the inside of the sewer pipe if the circumference of the outside of the pipe is 12.56 feet.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72