Answer:
Step-by-step explanation:
we know that
The simple interest formula is equal to
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest
t is Number of Time Periods
in this problem we have
substitute in the formula above
This ODE is separable; we have

Integrating both sides gives a general solution of

B is the only choice that is applicable.
Each piece is 7 and 1/3 feet long (7 feet 4 inches)