Ten marbles are in a bag four of them are red, if one marble is drawn out the bag what is the probability that it will be red

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

Plzz ! need the answer asap! 7% of 980

Is (root2 -2)^2 rational or irrational. show the steps and answer fast