princesskoi2756 princesskoi2756 23-11-2017 Mathematics contestada Find both unit rates. $27 for 4 hours of work A. $6.75 per hour and 0.15 hours per dollar B. $108 per hour and 6.75 hours per dollar C. $6.75 per hour and 108 hours per dollar D. $0.15 per hour and 6.75 hours per dollar