Solve the problem.Use of the internet for shopping is increasing dramatically, but still is somewhat age dependent. When a popular web site that sells books asked the age of users who bought products from them over the internet, they obtained the following data. What is the probability that a buyer on this web site is aged 
A. 3.48%
B. 3.46%
C. 3.36%
D. 3.50%
Answer: C
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Simplify the expression. ? 23 - 2·4 ?
A. 84 B. 4 C. –15 D. 15 E. 8
Solve the problem. Use 3.14 as an approximation for ? where appropriate.The Great Pyramid of Giza was built around the year 2560 BC. It was originally 481 feet high with a square base measuring 751 feet on each side. Its slant height was 611 feet. Find the volume of the Great Pyramid. Round your answer to four significant digits.
A. 114,900,000 ft3 B. 90,430,000 ft3 C. 271,300,000 ft3 D. 1,481,700 ft3
Solve the problem.Standing 16 feet from a streetlight, a 7-foot-tall tree casts a 4-foot shadow. How tall is the streetlight?
A. 21 ft B. 42 ft C. 28 ft D. 35 ft
Find the domain of the given function.f(x) = 
A. (-?, -8) ? (-8 -3) ? (-3, 2) ? (2, ?) B. [-3, 2) ? (2, ?) C. All real numbers D. (0,?)