Find the average of the numbers.8, 9, 20, 18, 6, 9, 1, 9
A. 9
B. 10
C. 17
D. 11.43
Answer: B
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Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 7 years? (Round to the nearest acre.)
A. 6651 B. 4618 C. 11,202 D. 4865
Solve the problem.The sales of a new model of notebook computer are approximated by 
, where x represents the number of months the computer has been on the market and S represents sales in thousands of dollars. In how many months will the sales reach $1,500,000?
A. 13 months B. 17 months C. 10 months D. 20 months
Find the area.
A. 338 m2 B. 936 m2 C. 403 m2 D. 468 m2
Use an identity to write the expression as a single trigonometric function or as a single number.4 sin 2x cos 2x
A. cos 4x
B. 
sin 16x
C. 2 sin 4x
D. cos 8x