Question

Kelly buys 11 pens for $8.25.

What is the cost of 18 pens?



Enter your answer in the box.

$

Answer 1

To find the cost of 18 pens, we first need to determine the cost of one pen by dividing the total cost for 11 pens by the number of pens.

Cost of one pen = \( \frac{8.25}{11} \)

Calculating this gives us:

\[
\frac{8.25}{11} = 0.75
\]

So, the cost of one pen is $0.75.

Now, to find the cost of 18 pens, we multiply the cost of one pen by 18:

Cost of 18 pens = \( 0.75 \times 18 \)

Calculating this gives us:

\[
0.75 \times 18 = 13.5
\]

Thus, the cost of 18 pens is \( \text{\$} 13.50 \).

\[
\text{The answer is } \boxed{13.50}
\]