Aprime polynomial is an irreducible polynomial with integer coefficients that cannot be factored into polynomials of lower degree over the real number system. which trinomial is prime?

a.) x2 – 7x – 18
b.) x2 – 9x – 18
c.)x2 + 3x – 18
d.)x2 + 17x – 18

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches. approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *