Mathematics, 17.03.2020 17:32 zayy8595
A certain country has $10 billion in paper currency in circulation, and each day $50 million comes into the country's banks. The government decides to introduce new currency by having the banks replace old bills with new ones whenever old currency comes into the banks. Let x(t) denote the amount of new currency (in billions of dollars) in circulation at time t (in days), with x(0) = 0. Then dx/dt=(fraction of currency that is old)(0.05billion$/day)sodx/dt=((10- x)/10)*(0.05)=0.005(10-x)With this info, determine x(t) by solving the differential equation and using the initial condition x(0)=0.
Answers: 3
Mathematics, 21.06.2019 21:30
Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?
Answers: 1
Mathematics, 21.06.2019 21:40
In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.
Answers: 3
A certain country has $10 billion in paper currency in circulation, and each day $50 million comes i...
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