What is a quartic polynomial function with rational coefficients that has roots i and 2i
a)x^4-5x^2-4
b)none
c)x^4+5x^2+4
d) x^4+5x^2-4
e)x^4-5x^2+4

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.