If f(x) represents the number of hours required to travel x miles, what is the domain of the function, f(x)? x≥0
x is greater than or equal to 0
f(x)≥0
f of x is greater than or equal to 0

The value of
f(x)
can be any real number.
The value of f of x can be any real number.

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The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.