Given that sin(90 -5ϴ) = Cos(180 - ϴ), Find the value of ϴ

I'm so close to finishing all these.

The data represents the semester exam scores of 8 students in a math course. {51,91,46,30,36,50,73,80} what is the five-number summary?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.