75 is what percentage of 50? 20 is what percentage of 40?

9 is what percentage of 90?

4 is what perentage of 16?

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Which statement justifies why angle ebc measures 90?

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

See attachment below and find the equivalent of tan(∠qsr)