The Total Cost in Dollars of Producing X Lawn Mowers

Multiple Choice

The total cost in dollars of producing x lawn mowers is given by C(x) = 4,000 +90x - Find the marginal
average cost at x = 20, and interpret the result.

A) -$10.33; a unit increase in produuction will decrease the average cost per unit by approximately $10.33 ata
production level of 20 units.
B) -$13.33; a unit increase in production will decrease the average cost per unit by approximately $13.33 at a
production level of 20 units.
C) -$1.33; unit increase in prodction will decrease the average cost per unit by approximately $1.33 at a
production level of 20 units.
D) -$20.33; a unit increase in production will decrease the average cost per unit by approximately $20.33 at a
production level of 20 units.