Solve the problem.An auditorium has 25 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seats are in the auditorium?
A. 900
B. 500
C. 850
D. 550
Answer: C
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Solve the problem.What is the size relationship between the interquartile range and the standard deviation of a data set?
A. The interquartile range can be smaller than, equal to, or bigger than the standard deviation. B. The interquartile range is always equal to the standard deviation. C. The interquartile range is always more than the standard deviation. D. The interquartile range is always less than the standard deviation. E. none of these
Solve the problem.Use the formula D = 10.0 log(S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. What is the intensity in watt/m2 of a noise measured at 40 decibels? (Round to the nearest tenth.)
A. 4 × 10-10 watt/m2 B. 1.0 × 10-7 watt/m2 C. 1.0 × 10-8 watt/m2 D. 5.5 × 1013 watt/m2
Solve the equation by factoring.9x2 + 21x + 10 = 0
A. 
B. 
C. 
D. 
Find the equation of variation if the following is true.Suppose r varies directly as s and r = 0.0769 when s = 1.
A. r = 0.0769s B. r = 13s C. r = 12s D. r = 14s