Caitlin is thinking of a number that is greater than -53/4 and less than -5 1/2 . which number could be caitlin's number?

a -5.8
b-5.7
c-5.4
d -5.3

I assume you mean -5 and 3/4 instead of -53/4. In that case, it cannot be A, as -5.8 is less than -5.75 (AKA -5 3/4). It cannot be C or D either, though, as the number has to be less than -5.5, and -5.4 or -5.3 are both more than -5.5. Thus, by process of elimination, it has to be B, - 5.7. Hope I helped! Good luck in future!