Question

whitney is starting a clothing store . with 12 apools of thread of , she can sew 28 sweaters. if whitney needs 150 sweaters for the opening day in 14 day , and each spool of thread cost $9.65 ,how much will the thread cost to make the sweaters for opening day /

Answer 1

Step 1 — spools per sweater:
12 spools → 28 sweaters, so spools per sweater = 12/28 = 3/7 ≈ 0.4286 spools/sweater.

Step 2 — spools needed for 150 sweaters:
(3/7) × 150 = 450/7 ≈ 64.2857 spools.

Step 3 — cost:
If fractional spools were allowed: 64.2857 × $9.65 ≈ $620.36.
But you must buy whole spools, so round up to 65 spools: 65 × $9.65 = $627.25.

Answer: you will need about 65 spools and the thread will cost $627.25 (if buying whole spools).