Help pls just help i can't take this anymore​

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)

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?