Anyone know the answer, thank you

Write the equation in logarithmic form m^x=n

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

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