What is simplify-log_{10}(8.1*10^{-9}) ?

The solution to simplify-log_{10}(8.1*10^{-9}) is -log_{10}(8.1)+9

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simplify-log_{10}(8.1*10^{-9})

simplify

- lo g_{10} (8.1 \cdot 1 0^{- 9})

- lo g_{10} (8.1) + 9

Decimal Notation

8.09151 \dots

Solution steps

- lo g_{10} (8.1 \cdot 1 0^{- 9})

Apply log rule:

lo g_{c} (ab) = lo g_{c} (a) + lo g_{c} (b)

lo g_{10} (8.1 \cdot 1 0^{- 9}) = lo g_{10} (8.1) + lo g_{10} (1 0^{- 9})

= - (lo g_{10} (8.1) + lo g_{10} (1 0^{- 9}))

Apply log rule:

lo g_{a} (x^{b}) = b \cdot lo g_{a} (x)

lo g_{10} (1 0^{- 9}) = - 9 lo g_{10} (10)

= - (lo g_{10} (8.1) - 9 lo g_{10} (10))

9 lo g_{10} (10) = 9

= - (lo g_{10} (8.1) - 9)

Distribute parentheses

= - (lo g_{10} (8.1)) - (- 9)

Apply minus-plus rules

- (- a) = a, - (a) = - a

= - lo g_{10} (8.1) + 9

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What is simplify-log_{10}(8.1*10^{-9}) ?
The solution to simplify-log_{10}(8.1*10^{-9}) is -log_{10}(8.1)+9