An oil storage tank that holds 48,000 barrels is one-quarter full. Oil is being pumped into the tank at the rate of 600 barrels per hour. The quality control crew that will draw samples when the tank is full wants to know how may days it will take to complete the fill so that they can set the sampling schedule.

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.