How do I answer these questions?

Question

Evaluate using your calculator, giving at least 3 decimal places:

log=

Evaluate each of the following, to at least 3 decimal places.

log(10,000,000) = 

log(1/1000)

log(70) =

Answer 1

log without a base given means log base 10 (log₁₀). Some of these need a calculator, some don't:

log(890) use your calculator (look for the log or log₁₀ key)

log (10,000,000) = log(10⁷) = 7

log (1/1000) = log(10^-3) = ____

log(70) use you calculator