Please help me with this problem!

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

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.

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5