QuestionA Exploring Rati... BOOKMARK CHECK ANSWER AY HOL... LAY STOP
A notebook costs $\$ 4.50$ plus sales tax. After sales tax, the notebook is $\$ 4.86$. What is the sales tax rate?

Studdy Solution
Divide both sides by $4.50$ to solve for $r$:
$r = \frac{0.36}{4.50}$
Calculate $r$:
$r = 0.08$
Convert $r$ to a percentage:
$r = 0.08 \times 100\% = 8\%$
The sales tax rate is:
$\boxed{8\%}$