Multiply or divide as indicated.
÷ 
A. 
B. 
C. 
D. -1
Answer: B
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If k is negative, then the power function 
is a decreasing function for positive values of ?x.
Answer the following statement true (T) or false (F)
Graph the pair of parametric equations with the aid of a graphing calculator.x = 4 sin t - sin 4t, y = 4 cos t - cos 4t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
A tamoxifen study claims that a combination of chemotherapy and the hormone therapy tamoxifen is more effective than tamoxifen alone in preventing breast cancer. In the study, a group of researchers from the U.S. and Canada studied 1477 postmenopausal women with early-stage breast cancer. The women were randomly assigned to one of three study groups. Group A (361 patients) received tamoxifen alone on a daily basis for five years. Group B (566 patients) received chemotherapy and tamoxifen for six months, and then completed five years of tamoxifen treatment. Group C (550 patients) received chemotherapy alone for six months followed by five years of tamoxifen treatment. All 1477 patients knew which treatment they were receiving.This study can best be described as a
A. survey using stratified sampling. B. randomized controlled experiment. C. census. D. survey using quota sampling. E. survey using simple random sampling.
Simplify the complex rational expression using Method 1.
A. x - 7
B. 
C. 
D. x + 7