Uma makes a scale drawing of a patio. The drawing below shows the two scales she used to plan two patios of different sizes.
Scale 1: 1 cm: 3 m
Scale 2: 1 cm: 4m
B: 12 cm
C: 15 cm
A: 9 cm
Which shows the correct lengths of side C in both scales?

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours