Question

Please help need a 100!!!

Answer 1

Step One

Subtract pi*r^2 from both sides.

S - pi*r^2 = pi*r*L

Step Two

Divide the left side by pi*r

$\dfrac{S - \pi*r^2 }{\pi * r}$

Discussion

Believe it or Not, D is actually the second best answer. It recognizes what should be subtracted. The problem is that D has a fault in the numerator. It has S and pi * r^2 written in the wrong order.

There is the same problem with C. pi r^2 is subtracted from S not the other way around.

A is wrong. pi* r^2 is subtracted from S, not the other way around.

B is the correct answer <<<< answer

Answer 2

S= (pi times r times l) + (pi times radius squared)

Factor out the pi times r

S= (pi times r) l + r

Divide

S/(pi times r)= l + r

Find common denominator and subtract

(S- pi times r)/(pi times r) = l

The answer therefore is A