Tommy and sally are arguing over the meanings of x^4 and x^-4. tommy argues that x^4 is the reciprocal of x^-4. sally insists that x^-4 is the reciprocal of x^4 . who is correct? a. tommy is correct. x^4 is the reciprocal of x^-4. b. sally is correct. x^-4 is the reciprocal of x^4. c. both tommy and sally are correct. x^-4 and x^4 are the reciprocals of each other. d. niether sally nor sally is correct. neither x^-4 nor x^4 is a reciprocal of the other.