Write the exponential equation as an equation involving a logarithm.9x = 81
A. log981 = x
B. log819 = x
C. log81x = 9
D. logx81 = 9
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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Determine whether or not the function is one-to-one.
A. No B. Yes
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Convert to rectangular coordinates.(-8, ?)
A. (0, -8) B. (-8, 0) C. (0, 8) D. (8, 0)
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If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.? = 60°, A = 100 square meters, r = ?
A. 157 m B. 6.26 m C. 13.82 m D. 39.25 m
Mathematics