Can someone me on number 4 and 5 plz

Classify the following triangle check all that apply

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.