Use an equation to solve the problem.Sales tax on a $14 compact disc is $0.84. At what rate is sales tax computed?
A. 2%
B. 6%
C. 8%
D. 5%
E. 3%
Answer: B
Mathematics
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Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is between 780 and 820?
A. approximately 95% B. approximately 68% C. approximately 34% D. approximately 80% E. none of these
Mathematics
Find a ? b.a = 2i + 2j, b = -2.5i - 3j
A. 
B. -11
C. 
D. -1
Mathematics
Evaluate the exponential expression. Write the answer as an improper fraction where appropriate.114
A. -14 B. 1 C. 14 D. -1
Mathematics
Use the remainder theorem to find P(k).k = -2; P(x) = 9x4+ 5x3 + 4x2 - 3x + 28
A. 134 B. -206 C. 124 D. 154
Mathematics