Question

a pet store has a special offer this weekend. for every $30 that customers spend, the store will donate $3 to a pet rescue program. how much do customers have to spend in order to raise $10 for the pet rescue program? (tip: you can use the plus signs on the table to add more ratios.) table with amount spent (dollars) row having 30 and empty cells, amount donated (dollars) row having 3, empty, and 10, plus signs to add columns

Explanation:

Step1: Set up proportion ratio

Let $x$ = amount spent.
$\frac{\text{Amount Spent}}{\text{Amount Donated}} = \frac{30}{3} = \frac{x}{10}$

Step2: Simplify the known ratio

$\frac{30}{3} = 10$, so $10 = \frac{x}{10}$

Step3: Solve for $x$

Multiply both sides by 10:
$x = 10 \times 10$

Answer:

100 dollars