When a firm hires 10 units of labor, 20 pens are produced. when it hires another unit of labor, the total output increases to 23 pens. if the price of one pen is $2, the value of the marginal product of the eleventh unit of labor is

a. $6

b. $4

c. $2

d. $1.50

answer: b. false

the staff is a set of five horizontal lines and four spaces which represent a different musical pitch. the lines and the spaces are numbered from bottom to top, the bottom line is the first line and the fifth line is the line on the top. the notes on the top of the staff (fifth line) have a higher pitch than a note at the bottom of the staff.

the correct answer will be d