Please help this is urgent!! Will mark brainliest! What’s the volume of the shown image

Me because some of question i don’t understand

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 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 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with