Solve the problem.37% of those who purchase music CDs online are 18-23 years old.This is three and one-half times the number who are 38-43 years old. What percent of online music purchasers are 38-43 years old?
A. 10.6%
B. 37%
C. 111%
D. 129.5%
Answer: A
Mathematics
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Solve.There are currently 54 million cars in a certain country, decreasing by 0.9% annually. How many years will it take for this country to have 44 million cars? Round to the nearest year.
A. 256 yr B. 23 yr C. 5 yr D. 11 yr
Mathematics
Solve the equation.-6x = -36
A. -30 B. 6 C. 30 D. 2
Mathematics
Find a formula for the nth term of the sequence.The sequence 0, 0, 2, 2, 0, 0, 2, 2, . . . (alternating 0's and 2's in pairs)
A. an = 1 - (-1)n(n-1) B. an = 1 + (-1)n(n-1) C. an = 1 + (-1)n(n+1) D. an = 1 + (-1)(n(n+1))/2
Mathematics
Solve the problem.Find the equation of the line which contains P(-7, 1) and which is parallel to the y-axis.
A. y = 1 B. y = -7 C. x = 1 D. x = -7
Mathematics