Find a polynomial function of lowest degree, with real coefficients, with the given roots. roots: -4, i, 5

a) f(x) = x^4 - x^3 - 19x^2 - x - 20
b) f(x) = x^4 + x^3 - 19x^2 + x - 20
c) f(x) = x^3 - (1 + i)x^2 - (20 - i)x + 20i
d) f(x) = x^3 + (1 + i)x^2 - (20 + i)x + 20i

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.