Solve the problem.A survey is taken to determine if Social Security should be privatized. Eight hundred players in a national bridge tournament are randomly surveyed. The survey found strong opposition to the concept of privatization. This conclusion might be invalid because
A. the size of the sample is too small.
B. of the placebo effect.
C. the sample is not representative of the population.
D. there was no control group.
E. none of these
Answer: C
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Write each equation in standard form and identify a, b, and c. 5x2 + 12x - 15 = 0
A. a = 5, b = -12, c = -15 B. a = 5, b = 12, c = 15 C. a = 5, b = -12, c = 15 D. a = 5, b = 12, c = -15
Solve. Write results using scientific notation.The distance from the earth to the sun is 92,900,000 miles. How long would it take a rocket, traveling at 2.9 x 103 miles per hour, to reach the sun?
A. 3.2 x 102 hr B. 3.2 hr C. 3.2 x 103 hr D. 3.2 x 104 hr
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.(-32)1/5
A. 16 B. 32 C. -8 D. -2
Find the unknown value.153 is 45% of what number?
A. 0.29 B. 29 C. 340 D. 3400