I have several problems like this and I do not know how to put it in the calcula

Question

I have several problems like this and I do not know how to put it in the calculator correctly. I will state the whole problem but what I really need to know is how to put it in the calcualtor.
The sales decay constant for a particular product is a=0.03. The rate of sales at time t=0 is So=80,000 where t is the time in years. Find the rate of sales, S(9) using S(t) = Soe-at

S(9)=80000e-0.03(9) This is what I cannot figure out how to put in the calculator.

Can someone walk me through the steps. I have TI-83 Plus.

Explanation / Answer

first press shift then press log button on screen u will see e^x there at x give -0.03*9 then press equal button alternatively use online calculator. at http://web2.0calc.com/ paste 80000*exp(-0.03*(9) ) in box then click enter. 61070.35954694825485 this is ans.

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