Solve the problem.If a contractor charges $100 per visit plus $10 per hour, express the total charge C as a function of the number of hours worked, n
A. C = 100 - 40n
B. C = 100n - 10
C. C = 100n + 40
D. C = 100 + 10n
Answer: D
Mathematics
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pints to cups
A. 16 cups B. 9 cups C. 18 cups D. 8 cups
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Solve the problem.How many different ways can you make change for a 25-cent coin using nickels and pennies?
A. 6 ways B. 5 ways C. 4 ways D. 7 ways
Mathematics
Sketch the curve.
?
?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The population of a particular country was 28 million in 1980; in 1988, it was 40 million. The exponential growth function 
describes the population of this country t years after 1980. Use the fact that 8 years after 1980 the population increased by 12 million. Find k rounded to three decimal places.
A. 0.045 B. 0.878 C. 0.311 D. 0.055
Mathematics