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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: ahat on August 11, 2013, 09:05:14 am

Title: Easy modelling with differential equations?
Post by: ahat on August 11, 2013, 09:05:14 am

A population of plants is decreasing according to the differential equation dP/Dt = -P/50 where t = days, find the time taken for the population to decease to 25% of its original number.

I'm unsure of how to approach this. Help appreciated.

Title: Re: Easy modelling with differential equations?
Post by: ahat on August 11, 2013, 09:19:22 am

Don't worry - got it! :D

Title: Re: Easy modelling with differential equations?
Post by: satya on August 17, 2013, 01:27:31 pm

is the answer 69 days??
sorry i just want to see i am on the right track

Title: Re: Easy modelling with differential equations?
Post by: ahat on August 19, 2013, 08:40:28 pm

yeah :)