a salesman earns commission on units sold. the more units he sells, the more commission he earns on a particular unit. for the first unit,he earns $20. for each subsequent unit, he earns 2% more.how much does the sales man earn on the 25th unit?

Question

anonymous · Answer

$20\times 1.02$ for the second unit
$20\times (1.02)(1.02)=20\times (1.02)^2$ for the third
$20\times (1.02^2)(1.02)=20\times (1.02)^3$  for the fourth
any idea for the 25th?

anonymous · Answer

i pluged in 24 where the 2 is and pluged in 25 where the 3 is. but i get nothing.  20(1.02^24)(1.02) = 20(1.02)^25

anonymous · Answer

pattern should suggest in the 25 one you have 
$20(1.02)^{24}$ need a calculator for his

anonymous · Answer

about $32.17 http://www.wolframalpha.com/input/?i=20%281.02%29^24

anonymous · Answer

oh i see, thanks