3. consider that breeder reactors are to be built using 233u (obtained from 232th) and 239pu, respectively. a. what is the maximum conversion ratio that could be achieved in principle with each fuel? (assume that the reactor consists of pure fuel and that no neutrons escape from it.) b. what factors cause real-world conversion ratios to be lower than the values you calculated in part a? c. explain why "reactor grade" plutonium is not desired for use in a weapon.

You wish to retire in 13 years, at which time you want to have accumulated enough money to receive an annual annuity of $23,000 for 18 years after retirement. during the period before retirement you can earn 9 percent annually, while after retirement you can earn 11 percent on your money. what annual contributions to the retirement fund will allow you to receive the $23,000 annuity? use appendix c and appendix d for an approximate answer, but calculate your final answer using the formula and financial calculator methods.