Can someone show a step by steo for number 10

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq