Find the maximum value of the function f(x)= -1.1x^2 - 3.6x +1 to the nearest hundred

Rational numbers are numbers that can be written as a quotient of two integers:     a/b where a and b are both all integers can be expressed as fractions with 1 in the denominator. for example, 1 is 1/1, 2 is 2/1, -4 is the same as -4/1, and so on. so we can write all the integers as a  fraction with integer numbers in both the numerator and denominator. therefore, all integers are rational numbers.this statement is true.