The population of a small town is increasing by 52 people per month. if the current population is 5693 people, how many months ago was the population 3613 people?

  40

Step-by-step explanation:

The population has increased by 5693 -3613 = 2080 people. At 52 people per month, that increase represents a time period of ...

  (2080 people)/(52 people/mo) = 2080/50 mo = 40 mo

40 months ago, the population was 3613.

5/12

Step-by-step explanation:

tan is opposite/adjacent

the opposite of a is 5 and the adjacent of a is 12