Question

After Hiro's family photoshoot, the photographer sells the printed photos by the sheet. Hiro has a \$200$200dollar sign, 200 credit from a prior session, and the above equation gives the total credit left, CCC, in dollars, if he buys sss sheets. How many sheets can Hiro purchase with his credit?

Answer 1

Answer: 5 sheets

Explanation:

The question seems incomplete, however, I found the mentioned equation:

$C=40 (5-s)$

We are told $C$ is in units of and $s$ is in units of $sheets$, this means the other side of the equation must be in , as well.

So, if we make a dimensional analysis :

$\ =40\frac{\ }{sheets} (sheets)$

This means each sheet costs $\ 40$, then with a Rule of three, we can find how many sheets Hiro can purchase with  $\ 200$:

If:

1 sheet ---- $\ 40$

s sheets ---- $\ 200$

Then:

$s=\frac{(\ 200)(1 sheet)}{\ 40}=5 sheets$

Therefore,  $C=\ 0$ (the total credit left is zero) and we can verify $s=5$ by isolating it from the equation:

$s=\frac{200 - C}{40}$

$s=\frac{200 - 0}{40}$

$s=5$