Rationalize the denominator of the expression. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 3 - 
Answer: A
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Determine the principal value without using a calculator.3
A. 9 B. 5 C. Not real number D. 3
Find the requested value for the given functions.f(x) = x + 6, g(x) = x - 10 Find (f ? g)(x) and (f ? g)(7).
A. (f ? g)(x) = x2 + 4x - 60; (f ? g)(7) = 17 B. (f ? g)(x) = x2 + 16x + 60; (f ? g)(7) = 221 C. (f ? g)(x) = x2 - 4x - 60; (f ? g)(7) = -39 D. (f ? g)(x) = x2 - 4x + 60; (f ? g)(7) = 81
Use front-end rounding to round each number. Then, multiply the rounded numbers to get an estimated answer. Finally, find the exact answer.estimateexact
?
A. Estimate: 8; exact: 6.768 B. Estimate: 3; exact: 5.768 C. Estimate: 0.8; exact: 0.6768 D. Estimate: 0.3; exact: 6.668
Solve the problem.A life insurance company uses the following rate table for annual premiums for women for term life insurance. Use a graphing utility to fit an exponential function to the data. Predict the annual premium for a woman aged 70 years.
A. y = 8.94e0.068x, $1044 B. y = -9306.4 + 2516.3 ln (x), $1723 C. y = 0.0000398x4.06, $1233 D. y = 6.367e0.068x, $743