Ineed with 1-3 (it's for physical science)

1: 0.00196g/mL or 0.00196 grams per milliliter

2: the answer is 1 g/cm^3

3. 5g/mL

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.

Ithink it is 7. 16