Need answer to number six in this photo

The equations for both runners are:

a(t) = -600 + 225tb(t) = 200t

If you equate them, you get -600 + 225t = 200t, which you can simplify to t=24. This means that 

a(24)=b(24)=4800

So ana wins; she catches up at 4800m after 24 minutes, which is well before the end of the part.

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.

Uneed to add them up 27+18+23=68