Solve. Write the fraction in simplest form.Of the fifty states in the United States, 12 have at least one mountain higher than 12,000 feet. What fraction of states have at least one mountain higher than 12,000 feet?
A. 
B. 
C. 
D. 
Answer: D
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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
Determine whether the vectors v and w are orthogonal.v = < 8, -2 >, w = < -3, -9 >
A. Not orthogonal B. Orthogonal
Solve.
+ 
= 
A. -3, 1 B. 1 C. -3, -1 D. 3, 1
Find the radius of a circle if the diameter has the value given.d = 62 yd
A. 97.34 yd B. 15.5 yd C. 31 yd D. 3017.54 yd