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R=380(1.08)^(t)
The given equation models the revenue in thousands of dollars, 
R, of a company 
t years after 2012 . Of the following, which equation models the revenue of the company 
q quarters after 2012 ?
Choose 1 answer:
(A) 
R=380(1.02)^(4q)
(B) 
R=380(1.36)^(q)
(C) 
R=380(1.08)^((q)/(4))
(D) 
R=380(1.08)^(4q)

The given equation models the revenue in thousands of dollars, R R , of a company t t years after 20122012. Of the following, which equation models the revenue of the company q q quarters after 20122012?\newlineChoose 11 answer:\newline(A) R=380(1.02)4q R=380(1.02)^{4q} \newline(B) R=380(1.36)q R=380(1.36)^{q} \newline(C) R=380(1.08)q4 R=380(1.08)^{\frac{q}{4}} \newline(D) R=380(1.08)4q R=380(1.08)^{4q}

Full solution

Q. The given equation models the revenue in thousands of dollars, R R , of a company t t years after 20122012. Of the following, which equation models the revenue of the company q q quarters after 20122012?\newlineChoose 11 answer:\newline(A) R=380(1.02)4q R=380(1.02)^{4q} \newline(B) R=380(1.36)q R=380(1.36)^{q} \newline(C) R=380(1.08)q4 R=380(1.08)^{\frac{q}{4}} \newline(D) R=380(1.08)4q R=380(1.08)^{4q}
  1. Convert to Quarters: The original equation is R=380(1.08)tR=380(1.08)^{t}, where tt is in years. We need to convert this to quarters. There are 44 quarters in a year, so we need to find the equivalent growth factor for a single quarter.
  2. Find Quarterly Growth Factor: To find the growth factor per quarter, we take the annual growth factor, which is 1.081.08, and take the fourth root of it because there are 44 quarters in a year. The fourth root of 1.081.08 can be written as (1.08)(1/4)(1.08)^{(1/4)}.
  3. Calculate Quarterly Growth Factor: Now we calculate (1.08)14(1.08)^{\frac{1}{4}} to find the quarterly growth factor. This can be done using a calculator or approximating the value.
  4. Approximate Quarterly Growth Factor: Using a calculator, we find that (1.08)1/4(1.08)^{1/4} is approximately 1.01981.0198, which can be rounded to 1.021.02 for simplicity. This is the growth factor per quarter.
  5. Express Revenue in Quarters: Now we need to express the revenue RR in terms of qq quarters. Since the growth factor per quarter is 1.021.02, and there are qq quarters, the equation becomes R=380(1.02)qR=380(1.02)^{q}.
  6. Adjust for Quarterly Growth: However, we need to account for the fact that the growth happens every quarter, not annually. Therefore, we need to raise the growth factor to the power of 4q4q to represent qq quarters. The correct equation is R=380(1.02)4qR=380(1.02)^{4q}.

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