I need to know why my answer was wrong, I made 6120 X 125, we get 5 and multiply it with 0, 2, 1, 6. Same with 2 and 1. It turned out 766000 but not 765000, Why???

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?

Can someone me out here number 4 plz