Answer:
$17
Explanation:
Cherries cost $4.99 per pound ($4.99/lb). This is the ratio of interest. Lacey buys 3.5 pounds. We can determine how much she will pay for the cherries using a conversion fraction.
3.5 lb × ($4.99/lb) = $17.47 ≈ $17 (rounding off to 2 significant figures)
Lacey will pay $17 for 3.5 pounds of cherries.