Help me please due in 10 minutes if u help i give u 20 points

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

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Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.