The graph shows the relationship between the total cost and the number of erasers bought at the student store. which statement is true? each eraser costs $1.00. each eraser costs $1.50. three erasers cost $6. seven erasers cost $3.50.

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.