The evolutionary process that selects variations in inherited characteristics that best suit an individual for survival and reproduction in a particular environment is known as:

Annuity payments are assumed to come at the end of each payment period (termed an ordinary annuity). however, an exception occurs when the annuity payments come at the beginning of each period (termed an annuity due). what is the future value of a 13-year annuity of $2,800 per period where payments come at the beginning of each period? the interest rate is 9 percent. use appendix c for an approximate answer, but calculate your final answer using the formula and financial calculator methods. to find the future value of an annuity due when using the appendix tables, add 1 to n and subtract 1 from the tabular value. for example, to find the future value of a $100 payment at the beginning of each period for five periods at 10 percent, go to appendix c for n = 6 and i = 10 percent. look up the value of 7.716 and subtract 1 from it for an answer of 6.716 or $671.60 ($100 × 6.716)

On july 7, you purchased 500 shares of wagoneer, inc. stock for $21 a share. on august 1, you sold 200 shares of this stock for $28 a share. you sold an additional 100 shares on august 17 at a price of $25 a share. the company declared a $0.95 per share dividend on august 4 to holders of record as of wednesday, august 15. this dividend is payable on september 1. how much dividend income will you receive on september 1 as a result of your ownership of wagoneer stock

Experienced problem solvers always consider both the value and units of their answer to a problem. why?