Question

What is the ratio of 3?

Answer 1

express the cost of each apple as an unit ratio

`\frac{\text{ \$3}}{1apple}`

if he bought 18 apples express it using the unit ratio

`18\text{apples}\cdot\frac{\text{ \$3}}{1apple}=\text{ \$54}`

Dan spent $54 on 18 apples.