I need some help with a few questions...

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I need some help with a few questions:

1) a population of 25000 in increases by 1.2% each year

just show me how to do the recusive routine so I can answer these :

a) population after 4 years

b) poplation after 84 months (7 years)

2) investment of 700 incresses by .3 per month.

just the routine, here, too.

a) after 5 months

b) after 1 year (12 months)

plesse just show me how to set up the equation, but you can also do the others if you want

Guest Jan 21, 2017

ElectricPavlov · Answer 1 · 2017-01-21T03:15:28

Example:

After TWO years the pop would be 25000 (1+i)^n where i= % growth rate per year in DECIMAL and n= number of years

= 25000(1+.012)^2

If it asks for months you will have to change the interest rate to a MONTHLY rate i/12 and n= months

Alan · Answer 2 · 2017-01-21T03:17:17

final population = initial population*(1 + yearly percentage/100)^number of years

a)final population = 25000*(1 + 1.2/100)^4

final amount = initial investment*(1 + monthly increase)^number of months

a) final amount = 700*(1 + 0.3)^5

Alan · Answer 3 · 2017-01-21T03:20:18

I've assumed that by 0.3 per month you meant exactly that. If you meant 0.3% per month then you would have to divide the 0.3 by 100.