[FONT="]At an effective annual compound interest of i>0, it is found that an investment doubles in a years, triples in b years and 1 grows to 5 in c years.[/FONT]
- Is c greater than, less than or equal to (3a+b)/2?
- To what amount does 10 grow in (3a + 2b) years?
- In how many years will 1000 grow to 1200?