To express: the given quantity in terms of the indicated variable.
The given quantity is “the interest obtained after one year on an investment simple interest”.
x is number of dollar invested.
Interest received on investment amount P at a rate r for a time period t is given by .
According to question, interest received on investment amount x at a rate for a time period of one year.
Therefore, interest received on investment is
Hence, the interest obtained after one year on an investment is .
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