The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,160 hours (90 days). as an experiment, holdlonger was added to the chlorine to find whetehr it would increase the shelf life. a sample of nine jugs of chlorine had hese shelf lives (in hours):
2159, 2170, 2180, 2179, 2160, 2167, 2171, 2181, 2185
at the .025 level, has holdlonger increased the shelf life of the chlorine? (estimate the p-value). show your detailed work.

Fabian harvests 10 pounds of tomatoes from his garden. he needs 225 pounds to make a batch of soup. if he sets aside 2.8 pounds of tomatoes to make spaghetti sauce, how many batches of soup can fabian make?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.