Final answer:
Janae's annual return on her investment can be calculated using the compound annual growth rate formula, which results in an annual return of approximately 7.5% when rounded to the nearest tenth of a percent. The closest answer choice is therefore 7.2%.
Step-by-step explanation:
To calculate Janae's annual return on her investment, we need to use the formula for compound annual growth rate (CAGR), which is: CAGR = (Ending Value/Beginning Value)^(1/Number of Years) - 1
In this case, Janae's beginning value is $11,000, her ending value after 10 years is $22,500, and the number of years is 10. Plugging these values into the formula gives:
CAGR = ($22,500/$11,000)^(1/10) - 1
CAGR = (2.04545454545)^(1/10) - 1
CAGR = 1.074607 - 1 = 0.074607 or 7.4607%
After rounding to the nearest tenth of a percent, Janae's annual return on investment is 7.5%. The answer to the question is therefore option c) 7.2%, which is the closest to the calculated value.