A survey shows that three out of every five teenagers at a particular school with cell phones use text messaging. In a group of 90 teenagers, how many would you expect use text messaging? 34 54 56 150

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.