Are the ratios 12:20 and 4:5 equivalent?

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Which of the following represents the length of a diagonal of this trapezoid?

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7