Arectangular prism is 6 inches long, 3 inches wide, and 2 inches high. what is its surface area?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).