Final answer:
The number -3.8 is a rational number, but not an integer as it can be expressed as a fraction -38/10.
Step-by-step explanation:
In the given options, the number -3.8 is a rational number, but not an integer. A rational number is a number that can be written as a fraction, where the numerator and denominator are both integers. -3.8 can be expressed as -38/10.