Chapter SH, Problem 3.5EP

To determine

To find the equation zero balance in the function $b=100-2.5f$ .

Answer to Problem 3.5EP

  $f=40$ .

Explanation of Solution

Given information:

The equation is $b=100-2.5f$ .

b is remaining balance of store credit.

f is number of flowers purchased.

Calculation:

  $b=100-2.5f$

When balance become zero

Then, $b=0$

Substituting value of b in the equation

  $0=100-2.5f.$

Rearranging equation

  $2.5f=100$

  

On solving,

  $f=40.$

Means: L will have spent all of his credt when he purchase 40 flowers.