Will give Brainily + 22pts ! A man invest 3,100 in three accounts that pay 4%, 5%, and 7% in annual interest, respectively. He has 3 times as much invested at 7% than he does at 4%. If his total interest for the years is $185, how much is invested at each rate ?

He invested $_ at 4%, $_ at 5% and $_ at 7%

Can u guys do this ratio question. this is extremely urgent a tap is leaking water at a rage of 1l every 8 hours. how long will it take for the tap to leak a total of 300ml?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

What does independent variable and dependent variable mean in math?