Americans consume about 13,150,000,000 gallons of carbonated drinks each year. express this number in scientific notation.
.1315 x 10 11

b)
1.315 x 10 10

c)
1.315 x 10 11

d)
13.15 x 10 9

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.