Question

ann wants to plant grass in her backyard. her backyard is in the shape of a rectangle. its length is 30 feet and its width is 21 feet. suppose each pack of seed covers 15 square feet. how many packs of seed will she need to cover the backyard?
packs

Explanation:

Step1: Calculate backyard area

Area of rectangle: $\text{Length} \times \text{Width} = 30 \times 21 = 630$ square feet

Step2: Find number of seed packs

Divide area by per-pack coverage: $\frac{630}{15} = 42$

Answer:

42 packs