In order to determine the effectiveness of a new vaccine that is alleged to cure "math anxiety," a study was conducted. One thousand volunteer college students enrolled in math courses across the U.S. were chosen. The 1000 students were broken up into two groups. Those enrolled in calculus courses were given the real vaccine. The students in developmental (remedial) math courses were given a fake vaccine consisting of sugared water. None of the students knew whether they were being given the real or the fake vaccine, but the researcher conducting the study knew. At the end of the semester the students were given a test that measured their level of math anxiety. The students in the treatment group showed significantly lower levels of math anxiety than those in the control group. On the
basis of this experiment the vaccine was advertised as being highly effective in fighting math anxiety.The sampling frame in this study consists of
A. all U.S. college students enrolled in math classes.
B. all U.S. college students.
C. all students that suffer from "math anxiety."
D. the treatment and control groups.
E. none of these
Answer: A
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Provide an appropriate response.
Find sin A to the nearest ten-thousandth if a = 14.5, b = 7.8, and c = 16.5.
A. 1.8591 B. 0.8485 C. 0.8788 D. 0.4727
Draw the angle in standard position.405°
A. 
B. 
C. 
D. 
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A. y = x + 4 B. x = y + 4 C. y = x - 12 D. no oblique asymptotes
Simplify the expression. Write the answer with only positive exponents. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. xy1/3