Max has a rectangular garden that is 3 feet by 7 feet If he

Max has a rectangular garden that is 3 feet by 7 feet. If he needs 2 ounces of fertilizer per square foot for the garden to flourish, how many ounces must he use?

A. 21 oz

B. 42 oz

C. 44 oz

D. 56 oz

Solution

B. Here you need to calculate the number of square feet in the garden and then determine how many ounces of fertilizer are needed. The area of a rectangular garden is calculated by multiplying the length × the width. So in this problem the area is 21 ft2. If you need 2 oz of fertilizer for every square foot, then you need to multiply 2 by the number of square feet.

21 × 2 = 42 oz