Microbiologists observe the growth of a colony of fungi during the experiment. The colony number in time t minutes is denoted as X. The colony growth rate is proportional to (X-200). At the beginning of the experiment, the number of species was 400. What will the dependence of colony number X on t look like if the number of colonies is known to be 860, and the growth rate is 60 species per minute?

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

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

Ftara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment?