David performed the following mathematical operation:

He was left with a remainder of zero. Which of the following statements must be true?

Question

David performed the following mathematical operation:

He was left with a remainder of zero. Which of the following statements must be true?

zab505 · Answer

attachment

zab505 · Answer

@Hero

zab505 · Answer

In the function f(t)=200(0.95)^t , what is the rate of change?
  		A. 	5% decay
  		B. 	5% growth
  		C. 	95% decay
  		D. 	95% growth

zab505 · Answer

I figured out the first question

hero · Answer

For the second one, the general formula is
y = ab^x
where b = 1 - r (since the value inside the parentheses is less than one it represents decay)
and r is the rate. 
Therefore you have
y = a(1 - r)^x

So in this case
a = 200
r = .05  or 5%
y = f(t)
x = t

Thus
f(t) = 200(1 - .05)^t
f(t) = 200(0.95)^t

See if you are able to make sense of any of that.

zab505 · Answer

Ah so the answer would be C!

zab505 · Answer

Wait D?

hero · Answer

I think you are guessing. The key is to pay attention to what r represents.

hero · Answer

And re-read everything I wrote. I mention some key words that you apparently missed.

zab505 · Answer

Ah it would be 5% decay?

hero · Answer

Yes, you have it finally

zab505 · Answer

Wow thank you so much I see what I was doing: Its asking how that function is achieved. Thanks :)