Divide.
A. 1.9
B. 19
C. 0.9
D. 9
Answer: C
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Find the length of the indicated portion of the curve.r(t) = (1 + 3t)i + (1 + 7t)j + (5 - 5t)k, -1 ? t ? 0
A. 
B. 
C. 
D. 
In order to determine how American undergraduate college students feel about eliminating spring break in order to finish spring term a week early, a survey was conducted. Two hundred undergraduate students from the University of Miami (FL) were interviewed. Both of the interviewers hired to conduct the survey were told to interview 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors. Of the 200 students interviewed, 20% were in favor of the elimination of spring break, 70% were opposed, and 10% had no opinion.The results of this survey are unreliable primarily because of
A. both selection bias and non-response bias. B. the absence of a control group. C. nonresponse bias only. D. selection bias only. E. none of these
Find an equation for the line with the given properties.Perpendicular to the line y = 4; containing the point (9, 2)
A. y = 9 B. x = 2 C. x = 9 D. y = 2
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.If the speed of light is 3.00 × 108m/sec, how long does it take light to travel 2.29 × 1011 m, the distance from the sun to Mars? Round to one decimal place.
A. 7.6 × 102 min B. 7.6 × 103 sec C. 7.6 × 102 sec D. 76 sec