Help with Exponential Functions

Question

darkbluechocobo · Answer

It is theorized that a particular toxin in the air decreases according to the model A(t)=10e^(-0.03187t), where t is time in hours and A represents the amount of the toxin left in the air in pounds. According to this model, how many pounds are initially in the air? After 10 hours, how much of this toxin will be left in the air? Round your answer to the nearest thousandth.

geerky42 · Answer

"According to this model, how many pounds are initially in the air? "

That's where t = 0, right?

So you initially have 10 pounds in the air.

"After 10 hours, how much of this toxin will be left in the air? Round your answer to the nearest thousandth."

Just plug in 10 for t then calculate A(10).

geerky42 · Answer

Long time no see, by the way!