To determine which fish Sasha bought, we can calculate the cost of each type of fish for the amount he purchased, \( \frac{3}{4} \) lb, and see which total equals $5.40.
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Salmon:
Cost per pound = $9.60
Cost for \( \frac{3}{4} \) lb = \( 9.60 \times \frac{3}{4} = 7.20 \) -
Whitefish:
Cost per pound = $7.20
Cost for \( \frac{3}{4} \) lb = \( 7.20 \times \frac{3}{4} = 5.40 \) -
Swordfish:
Cost per pound = $8.40
Cost for \( \frac{3}{4} \) lb = \( 8.40 \times \frac{3}{4} = 6.30 \) -
Haddock:
Cost per pound = $6.90
Cost for \( \frac{3}{4} \) lb = \( 6.90 \times \frac{3}{4} = 5.175 \)
The only option that matches Sasha's total of $5.40 is whitefish.
So, Sasha chose whitefish.