Scientific models have two basic types. true or false.

FALSE.

A scientific model is a simulation of a real system that omits all but the most essential variables of the system. Its aim is to make a particular part or feature of the world easier to understand, define and simulate.

There are three basic types of scientific models:

1- Physical models: Resembles the physical element they model.

2- Mathematical models: are made up by numbers and other mathematical data.

3- Conceptual models: represents systems of ideas.

what is the tax base for the sales tax?

it should be (usually ) 6%

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