(-4,3),(5,-9),(11,4),(9,6),(5,-3),( 8,-9),(1,4) state whether each set of ordered pairs represents a function

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What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year?