Solve the problem.The table below shows the results of a consumer survey of annual incomes in 100 households. 
What is the probability that a household has an annual income of $25,000 or more?
A. 0.28
B. 0.71
C. 0.57
D. 0.43
Answer: B
Mathematics
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Find the value of the constant k so that the function is a probability density function in the indicated interval.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
A. 
B. 
C. y12
D. 
Mathematics
Use the cofunction and reciprocal identities. Round to the nearest ten-thousandth when appropriate.tan 71° = 
19° = 
A. sin, tan B. cot, sec C. cot, cot D. sec, cot
Mathematics
Solve the problem.Given the demand function q = 863 - 3p, determine the price where demand has unit elasticity.
A. p = 143.83 B. p = 58.76 C. p = 29.38 D. p = 71.92
Mathematics