Answer + Step-by-step explanation:
This is a three degree function
(by the image A and B can't be right)

We know that
.
Solve using cross multiplication of the last two fractions. I will use
to represent the width of the rectangle. 
Multiply. 
Divide both sides of the equation by
. 
Hi! your answer should be 7.64 if I am not mistaken
Answer:
100% it is C
Step-by-step explanation: