Please answer this for me. Thanks.

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.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3