The aquarium is draining a large fish tank. The pump they are using can drain 40 gallons per hour. After 2 hours, there are 95 gallons left in the tank. Let x represent the number of hours and y represent the water left in the aquarium.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?