Solve the problem.Lauren earns $3 an hour selling encyclopedias door-to-door. She also earns $22 in commission per set of encyclopedias sold. To pay her rent this week, she must earn at least $112, and she only has time to work 8 hours. How many sets of encyclopedias must Lauren sell this week in order to make her rent?
A. She would have to sell at least 3 sets of encyclopedias.
B. She would have to sell at least 5 sets of encyclopedias.
C. She would have to sell at least 4 sets of encyclopedias.
D. She would have to sell at least 6 sets of encyclopedias.
Answer: C
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The quantity demanded each month of the Walter Serkin recording of Beethoven's Moonlight Sonata, manufactured by Phonola Record Industries, is related to the price/compact disc. The equation 
, where
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is the number of discs demanded, relates the demand to the price.
?
The total monthly cost (in dollars) for pressing and packaging
copies of this classical recording is given by 
.
?
To maximize its profits, how many copies should Phonola produce each month? Hint: The revenue is 
, and the profit is 
.
?
__________ copies
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Last week, Marco packed 159 parts. Find his gross weekly earnings if he is paid at the following differential piece rate.1-75 parts packed$0.75 each76-125 parts packed$1.50 each126 or more parts packed$2.00 each
A. $161.75 B. $238.50 C. $199.25 D. $201.00
Perform the conversion.0.61 mg = ___ g
A. 0.0061 B. 61 C. 610 D. 0.00061
Solve the problem.A caterer uses special stacking ovens to prepare large amounts of food. Find the total number of servings that can be prepared in one hour.Cookies: 18 servings per panNumber of pans per oven: 6Pan changes per hour: 6Number of ovens: 4
A. 648 servings B. 2542 servings C. 2592 servings D. 432 servings