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2021 AMC 12B Question 9

AMC12 · 2021 AMC 12B

Question 9

What is the value of the following expression? $$
\dfrac{\log_2 80}{\log_{40}2}-\dfrac{\log_2 160}{\log_{20}2}
$$
  1. $0$
  2. $1$
  3. $\dfrac{5}{4}$
  4. $2$
  5. $\log_2 5$