`log_(7)9=`

A

0.89

B

0.95

C

1.13

D

1.21

Text Solution

Verified by Experts

The correct Answer is:
C
Use the change-of-base theorem and your calculator to get.
`log_(7)9=(log_(10)9)/(log_(10)7)=(0.9542)/(0.8421)~~1.13`. In some of the newer `TI-84^(+)` calculators, you may enter the base, resulting in a single calculation.
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