An item costs $500 at time t=0 and costs $P in year t. When inflammation is r% per year, the price is given by P = 500e^(rt/100)
a) if r is a constant, at what rate is the price rising ( in dollars per year)
1) initially 2) after 2 years
b)now suppose that r is increasing by 0.3 per year when r=4 and t=2. At what rate is the price
increasing at that time?
I can do part a) of this question but cant figure out the solution to part b).

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inflammation?

inflation not inflammation sorry

b) use product rule

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