Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to two decimal places.log6.6 140
A. 21.21
B. 2.15
C. 2.62
D. 0.38
Answer: C
Mathematics
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Simplify the expression. Assume all variables represent nonnegative real numbers. Write the answer in exponential form when necessary.(x-5/4y5/7)1/2
A. x5/8y5/14
B. 
C. x-3/4y17/2
D. -x5/8y5/14
Mathematics
Solve the problem.The volume of a sphere is given by 
. A certain sphere has the property that 
. Find r.
A. 1.44 B. 1.46 C. 1.50 D. 1.48
Mathematics
Determine the number of terms and identify the coefficient of each term of the expression.2w - 9c - x
A. 3; 2, -9, 1 B. 3; 2, 9, -1 C. 3; 2, 9, 1 D. 3; 2, -9, -1
Mathematics
Rationalize the denominator. Assume that all variables represent positive real numbers.- 
A. - 
B. -7
C. -20
D. - 
Mathematics