Which is the most reasonable estimate for the height of a two-story house 15 centimeters, 15 meters, or 15 kilometers?

If the measure of xyz is 81 what is the measure of yz

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false

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