What is the area of the wall? (PLS HELP)

84 sq. ft.

78 sq. ft.

60 sq. ft.

27 sq. ft.

Wallpaper is sold in rolls that are 2 feet wide. What is the minimum length you would need to purchase to cover the wall?

your answer   is c

step-by-step explanation:

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using the formula for pythagorean theorem (a2+b2=c2)(the twos are exponents), and knowing that you have b squared and c squared, just reverse it. 26 squared minus 10 squared equals c squared. 26 squared is 676 and 10 squared is 100. you get 576, then use your square roots to undo the squared numbers to get 24.