Evaluate the line integral along the curve C.
ds, C is the curve r(t) = (10 sin 
t)i + (10 cos 
t)j + 12tk, 2 ? t ? 4
A. 
B. 
C. - 
D. 
Answer: A
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Solve. To measure the spread of data, statisticians compute the sample variance of the data. For a sample of size 3, the sample variance can be computed using the expression 
where m is the mean of the three values a, b, and c. Rewrite this expression without parentheses, combining like terms.
A. 3m2 - 2am - 2bm - 2cm + a2 + b2 + c2
B. 
C. 
D. 
Add or subtract as indicated.
+ 
A. 
B. 
C. 
D. 
Solve the problem.A bicyclist's average linear speed during a race was 36 miles per hour. His bicycle wheel has a 16-inch diameter. What was the angular speed of the wheel in revolutions per hour? Round to the nearest tenth.
A. 142,560 revolutions per hr B. 2.3 revolutions per hr C. 3781.5 revolutions per hr D. 45,378.3 revolutions per hr
Evaluate using the order of operations.-11 + 160 ÷ (-8)
A. 31 B. 19 C. -31 D. -19