A carpenter hammers nails each day at work.During the first hour she can hammer 120 nails,the second hour 100 nails,the third hour 90 nails,the fourth hour 60 nails,and the fifth hour 10 nails.Her marginal product in the third hour is _____ nails.
A)10
B)-10
C)90
D)-60

Question

Quizplus · Accepted Answer

The marginal product is the additional output produced by adding one more unit of input. In this case, the input is time spent hammering nails.

The marginal product in the third hour is calculated by taking the difference between the total number of nails hammered in the third hour (90) and the total number of nails hammered in the second hour (100).

Marginal product = 90 - 100 = -10

The negative sign indicates a decrease in output. So, the carpenter's marginal product in the third hour is -10 nails.

Therefore, the best choice is C.

A Carpenter Hammers Nails Each Day at Work