How to find absolute max for the equation -2x^2+8x-5, for the interval [3,7) and (-infinity, infinity)

The total number of dental clinics total for the last 12 months was recorded

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.

How to do a maths question? i have a mock