Mari has 28 wooden cubes. she want to stack them to form a triangle. each row will have one block fewer than the row below it. how many blocks will be on the bottom of the pyramid?

7 cubes.
imagine that ∆ are the blocks, it should be something like this:
∆
∆∆
∆∆∆
∆∆∆∆
∆∆∆∆∆
∆∆∆∆∆∆
∆∆∆∆∆∆∆
Add up everything 28 comes.

7 blocks will be at the bottom :)

Hope I helped :D

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.