Which digit in 789,456,321 shows the number of hundred million

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)