Answer:
the annual rate of return on the painting was -13.17%
Explanation:
we will construct the equation for future value at the annual rate of return at which a principal of 1,680,000 return 1,100,000 in three years:
[tex]Principal \: (1+ r)^{time} = Amount[/tex]
Principal 1,680,000
time 3 years
Amount 1,100,000
rate r
[tex]1,680,000 \: (1+ r)^{3} = 1,100,000[/tex]
[tex]r = \sqrt[3]{ 1,100,000 \div 1,680,000} -1[/tex]
r = -0.131650681 = -13.17%
As expected, because the amount after three years is lower than the principa the rate of return is negative