1) 15x^3 + 19x^2 + 6x a) (3x^2 +2)(5x+3) b) x(3x+2)(5x+3) c) x^2(3x+2)(5x+3) d) x(5x+2)(3x+3) e) prime i chose e) prime. 2) 2x^2 - 14x - 6x + 42 a) 2(x+7)(x+3) b) (x+7)(2x-6) c) 2(x-7)(x-3) d) (x-7)(x-3) e) prime i know that this is 2x^2 - 20 + 42 when you combine the 14x and 6x so i chose answer e) prime but i am not sure for this one.
Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.