Sushi costs $3 per piece.Cynthia's total utility after eating one piece is 30 and her total utility after eating 2 pieces is 51,so her marginal utility per dollar from the second piece is
A) 17.
B) 10.
C) 51.
D) 7.
E) 21.

Question

Quizplus · Accepted Answer

The marginal utility from the second piece is the change in total utility, which is 51 - 30 = 21. The marginal utility per dollar is 21 divided by the cost per piece, which is $3, resulting in 21/3 = 7.

Sushi Costs $3 Per Piece