you are throwing a birthday party for 11 guests (12 including yourself). each guest will probably eat 3 slices of birthday cake. each cake cost $12 and can be cut into 15 slices. how much will you have to spend to make sure there is enough cake for everyone at the party?

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.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.