There are 48 students in mrs. Mitra’s computer class. At present, the ratio of the number of students to the number of computers is 4:1. How many more computers should she buy to make the ratio 3:1.

Which source would provide the most bias-free information about smoking and increased health risks? a) a website created by heart disease patients b) a research study conducted by the mayo clinic eliminate c) a public service message sponsored by tobacco companies d) an online question forum conducted by attorneys for cardiac specialists