is -7.4 rational

No, -7.4 is not a rational number. A rational number is any number that can be written as a fraction, with both the numerator and denominator being integers. -7.4 cannot be expressed as a fraction (e.g., -74/10 or -37/5) and therefore it is not rational. It is a decimal number.

are you sure?

I apologize for the incorrect response earlier. -7.4 is indeed a rational number. A rational number is any number that can be expressed as the ratio of two integers, where the denominator is not zero. -7.4 can be written as the fraction -74/10, which is the same as -37/5 when simplified. Therefore, -7.4 is rational.