Chapter 3.4, Problem 13P

To determine

To find: The number of weeks that take to B to have $200 in his account

Answer to Problem 13P

The number of weeks = 32

Explanation of Solution

Given information: B has $88 in his account and saves $3.5 per week.

Calculation:

Let number of weeks be $n$

Then total amount in his savings is $A=88+3.5n$

Put $A=200$ in above equation

  $\begin{array}{l}200=88+3.5n\\ 3.5n=200-88\\ 3.5n=112\\ n=\frac{112}{3.5}\\ n=32\end{array}$

There B will take 32 weeks to have $200 in his account.