College

1. Which of the following is equal to [tex]\log 10^{-101}[/tex]?

A. [tex]10^{-101}[/tex]
B. [tex]10^{101}[/tex]
C. 101
D. -101

Answer :

To evaluate
[tex]$$
\log\left(10^{-101}\right),
$$[/tex]
we can use a property of logarithms which states that for any positive number [tex]$a$[/tex] and any number [tex]$b$[/tex],

[tex]$$
\log\left(a^b\right) = b \cdot \log(a).
$$[/tex]

Here, [tex]$a = 10$[/tex] and [tex]$b = -101$[/tex]. Since the logarithm is base 10 (as indicated by the notation [tex]$\log$[/tex]),

[tex]$$
\log\left(10^{-101}\right) = -101 \cdot \log(10).
$$[/tex]

We know that

[tex]$$
\log(10) = 1,
$$[/tex]

therefore,

[tex]$$
\log\left(10^{-101}\right) = -101 \cdot 1 = -101.
$$[/tex]

Thus, the answer is [tex]$\boxed{-101}$[/tex], which corresponds to choice (D).