Example 27=n3 : Take the cube root of 27. In general find the log, divide it by the power, then take the antilog.
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Depends on your calculator. If you have "raise to the power" then use "raise to the power 1/3". If not, try logs: either logs to base 10 or logs to base e will do: find the log, divide it by 3, then find the antilog. For base e, (log sometimes written "ln" meaning "natural log") the antilog is just the exponential : " ex ".
Base = 18, Power = 4
If it is log to the base 10, use the calculator to find 10 to that power. If it is log to the base e, use the calculator to find e to that power. Both the above are standard functions on all scientific calculators and are easy to work out on spreadsheets. Alternatively, you can find the antilog of the absolute value and then find the reciprocal. Thus antilog(-3.5) = 1/antilog(3.5) etc.
Find log of 50, this becomes power on base 10, so, 10 1.69897 = 50
Volume= 3.14 multiplied by radius of base to the second power multiplied by height of cylinder