Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to two decimal places.log6.8 2.5
A. 2.09
B. 0.37
C. 0.48
D. 0.40
Answer: C
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Multiply.Let P(x) = 3x2 - 3x - 5 and 
Find P(x) ? Q(x).
A. 3x4 + 12x3 - 6x2 - 26x - 10 B. 3x4 + 12x3 - 11x2 - 26x - 10 C. 3x4 + 9x3 - 6x2 - 26x - 10 D. 3x4 + 9x3 - 11x2 - 26x - 10
Determine the values of x for which the function is continuous. If the function is not continuous, determine the reason.f(x) = -6x - 4
A. Not continuous at x = -0.6666667; small change B. Not continuous at x = -4; small change C. Continuous for all x D. Not continuous at x = -0.6666667; function not defined
Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. ln 
- 
tan-1 
- 
+ C
B. ln 
- 
tan-1 
+ C
C. - 
tan-1 
- 
+ C
D. ln 
- 
+ C
Solve the problem.In a study of 135 women, roughly half took estrogen as well as calcium and vitamin D supplements and received regular dental checkups. The remaining women received the supplements and the checkups but substituted a sugar pill for the estrogen. Those who received the estrogen had an average 3.6 percent gain in bone density compared to a 0.2 percent bone density improvement in those taking the sugar pill. This study can best be described as
A. a survey using quota sampling. B. a controlled placebo experiment. C. a census. D. a survey using simple random sampling. E. the placebo effect.