5) A letter or symbol that is used to represent a number is called a _ _ _ _ _ _ _ _.
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Answer:
Step-by-step explanation:
Return Of Investment: <u><em>The performance used to evaluate the efficiency of an investment or compare the efficiency of a number of different investments. </em></u>
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It is a performance level used to compare the efficiency of one investment or more to several or just one more investments. They also evaluate the efficiency of one investment.
Return Of Investment (ROI) is very popular because it is simple, skilled and resourceful. If an investments ROI is net is positive, this tells them that it is worthwhile and has some use to it. If it is low, it lets people know that this is probably not the best solutions, and to not waste their time on something that won't work anyway.