(a) Niki invested $10,000 in the stock market. THe investment was a loser, declining in value 10% per year each year for 10 years. How much was the investment worth after 10 years? This one isn't tough: P = P0at P = 10,000(0.90)10 P = 10,000(0.348678...) P = $3,486.78 (b) After 10 years, the stock began to gain value at 10% per year. After how long will the investment regain its initial value ($10,000)? All right, for this one, I don't know if it means when will the investment get back to $10,000 or when will the $3,486.78 INCREASE by $10,000. I worked it out as when it would get back to $10,000, but I'm not sure what it's asking for: P = P0at 10,000 = 3,486.7844...(1.10)t 2.86797... = 1.10t log2.86797 = tlog1.10 t = 11.054.. 11.054 years Also, should I round that up to 12 years? or what? Thanks in advance.