8) A roller coaster climbs vertically 60metres at an angle of 30° from the lowest to the highest point of the track. It then plunges over the high point to begin
the 'fun part'. Calculate the length of the track from the top of the hill to the
bottom.

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.