Equipment was acquired at the beginning of the year at a cost of $75,720. the equipment was depreciated using the straight-line method based on an estimated useful life of six years and an estimated residual value of $7,920. what was the depreciation expense for the first year?

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.