At the fish counter, salmon was selling for $9.60 a pound, whitefish for $7.20 a pound, swordfish for $8.40 a pound, and haddock for $6.90 a pound. Sasha bought ¾ lb. of fish for $5.40. What fish did he choose?

1 answer

To determine which fish Sasha bought, we can calculate how much the ¾ lb. of each type of fish would cost.

  1. Salmon:

    • Price per lb: $9.60
    • Cost for ¾ lb: \( 9.60 \times \frac{3}{4} = 9.60 \times 0.75 = 7.20 \)
  2. Whitefish:

    • Price per lb: $7.20
    • Cost for ¾ lb: \( 7.20 \times \frac{3}{4} = 7.20 \times 0.75 = 5.40 \)
  3. Swordfish:

    • Price per lb: $8.40
    • Cost for ¾ lb: \( 8.40 \times \frac{3}{4} = 8.40 \times 0.75 = 6.30 \)
  4. Haddock:

    • Price per lb: $6.90
    • Cost for ¾ lb: \( 6.90 \times \frac{3}{4} = 6.90 \times 0.75 = 5.175 \)

Now we can summarize the calculated costs:

  • Salmon: $7.20
  • Whitefish: $5.40
  • Swordfish: $6.30
  • Haddock: $5.175

Sasha spent $5.40, which matches the cost of ¾ lb. of Whitefish.

Thus, Sasha chose Whitefish.