At the museum, 100 posters are displayed in each of 4 rooms. altogether, how many posters are displayed

To solve this you would multiply 100 and 4 which would be 400 so altogether there would be 400 posters in all 4 rooms.

All except for b, because polynomial functions can be quadratic, cubic, witticisms and etc only non negative exponents of negative it is not a polynomial function

1195 was the store owner's profit.