Solve the equation. Use the change of base formula to approximate an exact answer to the nearest hundredth when appropriate.10x = 543
A. x = log -543
B. x = log 
C. x = log 543
D. x = log - 
Answer: C
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Solve the problem.A 35-foot ladder is leaning against the side of a building. If the ladder makes an angle of 
with the side of the building, how far is the bottom of the ladder from the base of the building? Round your answer to the hundredths place when necessary.
A. 15.63 ft B. 20.03 ft C. 4.96 ft D. 14.33 ft
Solve the problem.Rope sells for 3¢ per inch at the local hardware store. If Sylvia needs 11 feet of this rope, how much money will she spend?
A. $0.33 B. $396.00 C. $3.96 D. $132.00
Provide an appropriate response.The roots of 
- x = 7 are
A. -4 only B. -4 and -9 only C. -4 and 9 only D. 4 only E. -9 only
Solve the problem.Suppose the supply function of a certain item is given by 
and the demand function is 
Find the producer's surplus.
A. 
B. 8
C. 16
D. 