I NEED HELP ASAP

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.

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.