Base is a number that represents the whole 100%. It is the whole to which something is being compared, usually follows the word of.
Rate is the percent that is multiplied times the base that indicates what part of of the base we are trying to compare to. RATE IS NOT A WHOLE NUMBER.
Portion is an amount, part, or portion the results from multiplying the base times the rate. BxR. NOT EXPRESSED AS A PERCENT; PORTION IS EXPRESSED AS A NUMBER
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A number is in exponential form when it is written with a base and an exponent.
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sum means the answer of a math problem
Justification in math terms means to show how you solved the math problem. Lay out the problem and show step-by-step how the problem is solved.
change of position, shape, or size of figure