Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
A. 8x39y12
B. 8xy12
C. 8xy4
D. 56xy12
Answer: B
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Use the information below to determine the cardinality of the set. U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z}n(A ? B)
A. 5 B. 3 C. 6 D. 10
Solve the problem.How much will it cost to carpet a 20 feet by 23 feet room if carpeting costs $19.50 per square yard?
A. $2990.00 B. $996.67 C. $8970.00 D. $747.50
Solve the problem.Find the volume of the solid bounded by the ellipsoid 
+ 
+ 
= 1 and the planes 
and 
(The area of an ellipse with semiaxes a and b is ?ab)
A. 240.00? units3 B. 5400.00? units3 C. 60.00? units3 D. 120.00? units3
Solve the equation. Use the change of base formula to approximate an exact answer to the nearest hundredth when appropriate.e-x = 
A. x = -ln 1
B. x = -ln 
C. x = -ln 18
D. x = ln 