Simplify the following expression into the form a bi, where a and b are rational numbers. (4-i)(-3 7i)-7i(8 2i).

Cindy uses 1-inch cubes to find the volume of a jewelry box shaped like a rectangular prism. she uses 780 cubes to completely fill the jewelry box with no gaps or overlaps. if the jewelry box is 13 inches long and 5 inches wide, how tall is cindy’s jewelry box?

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An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?