Aclassic problem to determine the number of different ways the letters of "magically" can be arranged

What is another way name for bd? cf, bd, cf, be

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.

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