Find the exact value of the expression.sin
A. 1
B. 0
C. 
D. 
Answer: A
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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.In this study, which is the control group?
A. Group B B. Group A C. Group C D. The 1477 postmenopausal women. E. There is no control group.
Two formulas that approximate the dosage of a drug prescribed for children are: Young's Rule: C = 
and Cowling's Rule: C = 
.In each formula, A = the child's age in years, D = an adult dosage, and C = the proper child's dosage. The formulas apply for ages 2 through 13. Use these formulas to solve the problem.Use Cowling's Rule to find the difference in a child's dosage for a 10-year-old child and a 6-year old child. Express the answer as a single rational (or fractional) expression in terms of D.
A. 
D
B. 
D
C. 
D
D. 4D
If the height, n, of a trapezoid equals the length of its shorter base and the longer base is twice the shorter base, then the area of the trapezoid is
(a) 2n (b) 3n2 (c) 1.5n3 (d) 1.5n2 (e) None of these is correct.
Fill in the blank with < or >.-4 
-7
A. < B. >