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What is the product of 1/5 and 5?*

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)