The Model $\sqrt { \hat { s t r } } = 12 + 20 \text { dia }$

Multiple Choice

The model $\sqrt { \hat { s t r } } = 12 + 20 \text { dia }$ can be used to predict the breaking strength of a rope (in pounds) from
Its diameter (in inches) . According to this model, how much force should a rope one-half inch in
Diameter be able to withstand?

A) 4.7 lbs
B) 22 lbs
C) 16 lbs
D) 256 lbs
E) 484 lbs