Question

A candle maker is ordering wax. Each small candle uses 12 ounces of wax. Each large candle uses 18 ounces of wax. The candle maker wants to make 42 small candles and 38 large candles.

Which answer is the most reasonable estimate of the total amount of wax needed?


700 ounces because 10 × 40 + 10 × 30 = 700

800 ouces because 10 × 20 + 20 × 30 = 800

1,200 ounces because 10 × 40 + 20 × 40 = 1,200

1,800 ounces because 10 × 20 + 40 × 40 = 1,800

Answer 1

1200 Oz because 10 * 40 + 20 * 40 = 1200

Explanation:

round 12 to 10 round 18 to 20 round 42 to 40 and 38 to 40