Abacteria culture is grown with a population of 45 million cells and kept under observation. the cell population is found to double every hour. what will the population be after four hours?

First hour would be 90 million cells second would be 180 million cells third would be 360 million cells so the last and 4th hour would be 720 million cells.
Therefore the answer is 720 million cells.

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.

Ican't solve. your equation is impossible. you can't have two equal signs.