<span><span>Rate of interest is the percent charged or earned. Time that ... 1) How much interest will he pay if he pays the entire loan off at the end of the third year? 2) What is the total amount that she will repay? ... To buy a laptop computer, Elaine borrowed $2,000 for 3 years at an annual simple interest rate of 5%. ... Use 0.05 for 5%.</span><span>
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Answer:
B all square are regular polygons
I agree with the author. By using the metric system we know the exact amount of a medicine we took, whether it's in mg or mL. This way every doctor can prescribe the same amount.
If we were using some other units this may not be the case. For example, british and american inch were different until 1950's.
Example: if you go to a surgery and a doctor needs to cut "1 inch from the left part" it may cause a mistake as this unit is different in different countries. But if he needs to cut "2.5 cm from the left part" he knows exactly where to cut.
Another benefit of using metric system is that it is being used in almost every country in the world.