20% of a university's freshman class are majoring in Economics. If 200 students in the freshman class
are Economics majors, how many students are in
the freshman class?

Anyone know? will mark brainliest if you're correct!

Is a positive integer raised to a negative power always positive

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.