Simplify the expression 12^-3 * 12^10 * 12^0

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?

Five friends found a dollar on the ground and decided they each should get 1/5 of it. what amount of money will each friend get? $0.05 $0.20 $0.30 $0.80