The rectangle shown is rotated about line k. Rectangle A B C D is shown. A line of rotation goes through the midpoint of sides A B and D C to cut the side into two equal lengths of 5 inches. Side A D has a length of 4 inches. What is the approximate base area of the resulting figure? Area of a circle: A = πr2 31 sq. in. 50 sq. in. 79 sq. in. 314 sq. in.

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Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?