Evaluate the expression according to the order of operations.82 - 4 ? 8
A. 128
B. 32
C. 256
D. 480
Answer: B
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Solve the problem.Maxwell's theory of electromagnetic waves established that electromagnetism moved through space in waves. Under certain conditions, an equation that Maxwell used to explain the motion of such waves would take the form 
where ? is the angle of incidence of the original wave, ? is the angle of incidence of the wave when reflected, A is the amplitude of the original wave, and B is the amplitude of the wave when reflected. Express 
in terms of sin 2? and sin 2?.
A. 
B. 
C. 
D. 
Provide an appropriate response.A horizontal beam safely supports a load P that varies jointly as the product of the width W of the beam and the square of the depth D and inversely as the length L. A beam that has a width of 10 in, depth of 18 in. and a length of 70 in. can safely support 1,944 lb. Determine the safe load in pounds of a beam made from the same material if the beam is 60 in. long.
A. 2,268 lb B. 1,417.5 lb C. 74 lb D. 420 lb
Solve the inequality. Graph the solution set, and state the solution set in interval notation.|5k + 8| ? 6
A. 
? 
B. 
C. 
D. 
State the domain of the rational function.f(x) = 
A. (-?, 12) ? (12, ?) B. (-?, - 3) ? (- 3, 3) ? (3, ?) C. (-?, - 12) ? (- 12, 12) ? (12, ?) D. (-?, 3) ? (3, ?)