Find the length of the curve.The spiral r = e4?, 0 ? ? ? ?
A. e8? - 
B. 
(?2 - 1)
C. 
(e4? - 1)
D. 
(e8? - 1)
Answer: C
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Let A = {1, 3, 5, 7}B = {5, 6, 7, 8}C = {5, 8}D = {2, 5, 8}U = {1, 2, 3, 4, 5, 6, 7, 8}.Determine whether the statement is true or false.{ } ? C
A. False; the elements in the empty set are not the same elements as in U. B. False; the empty set is not a subset of any set. C. True D. False; the empty set is not a subset of U.
Find price relatives for the item. Round to the nearest tenth of a percent.Item: RefrigeratorPrice then: $363Price now: $553
A. 152.3% B. 160.0% C. 150.8% D. 65.6%
Solve the problem.When a person bends at the waist with a straight back, the force, F, exerted by the person's lower back muscles can be estimated with the formula 
where w is the person's weight, and ? is the angle made by the person's torso relative to the horizontal. Suppose that a 
person bends at an angle of 35°. Determine the force exerted by the person's back muscles, and estimate the angle that requires the back muscles to exert a force of 393 pounds.
A. 568 pounds; 35° B. 568 pounds; 55.5° C. 398 pounds; 48.3° D. 29 pounds; 55.5°
Graph the equation.(x + 1)2 = 7(y + 1)
A. 
B. 
C. 
D. 