How do you calculate $log_8 7.9$ with a calculator?

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Answer 1 · 2016-09-06T09:31:25

$log_8 7.9=0.9939$

Let $log_ba=x$ . Hence $b^x=a$ and log (to the base $10$ ) on both sides, we get

$xlogb=loga$ or $x=loga/logb$

Hence $log_ba=loga/logb$ and

$log_8 7.9=log7.9/log8$

= $0.8976/0.9031$

= $0.9939$

How do you calculate log_8 7.9log_8 7.9 with a calculator?