Use ratios or conversion factors to convert the measures of time.Convert 168 hours to days.
A. 56 days
B. 84 days
C. 7 days
D. 49 days
Answer: C
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Find a 95% confidence interval for the true population proportion.In a random sample of 186 births at one hospital, 33% were by Caesarean section.
A. 25.7% to 40.3% B. 32.9% to 33.1% C. 29.3% to 36.7% D. 32.5% to 33.5%
Identify the conic section that the polar equation represents. Describe the location of a directrix from the focus located at the pole.r = 
A. hyperbola; The directrix is 3 unit(s) to the left of the pole at x = -3. B. ellipse; The directrix is 3 unit(s) to the right of the pole at x = 3. C. hyperbola; The directrix is 3 unit(s) to the right of the pole at x = 3. D. ellipse; The directrix is 3 unit(s) to the left of the pole at x = -3.
Write the phrase as a variable expression. Use x to represent "a number."A number subtracted from -7
A. -7 - x B. -7x C. -7 + x D. x - (-7)
Factor completely. 
A. 
B. 
C. 
D. prime
E. none of these