They are neither one-to-one correspondent nor equivalent.
Work Step by Step
From Exercises 113. and 114., we know that there are multiple values in the set of time that correspond to the same level of happiness. By definition, for 2 sets to have one-to-one correspondence, each element in one set must correspond to exactly one element in the other. Since these sets aren't one-to-one correspondent, they aren't equivalent either.