Candy has observed 250 sports cars at an intersection and found that 15% did not make a complete stop. Candy tells you that the margin of error was 8%. What was the confidence level of the study?

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50