SOLUTION: P=12+20In x represents the %of inbound email in the US that is considered spam, where x is the number of years after 2000. Use the model to determine in how many yrs (to 2 decimal

Question 404254: P=12+20In x represents the %of inbound email in the US that is considered spam, where x is the number of years after 2000. Use the model to determine in how many yrs (to 2 decimals places) it will take the % of spam to reach 90%. Use the model to determine the % of spam in the year 2005. Round to 2 decimal places. Please help these are killing me.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

First, you have to find out what is in the year 2001
If is the number of years after 2000, then when
the year = 2001, so

(or, 12%)
----------
I want to get an idea how fast increases with
, (25.863% in 2002)
, (33.972% in 2003)
, (39.726% in 2004)
, (44.189% in 2005)
OK, is going to be pretty large.

I'll write this as an exponential:

So, it takes 49.4 years after 2000, or 2049 + 5 months to reach 90% spam
---------------------
Now find when

The spam is 44.19% in 2005
--------------------
I would guess that your problem is:
When they say percent, they don't mean .90, but the actual %, 90

RELATED QUESTIONS
Hello! I have been working on this problem for the past 20 min P=13+45ln x represents the (answered by jim_thompson5910)

Suppose that the function represents the percentage of inbound e-mail in the U.S. that is (answered by checkley77)

Suppose that the function P = 13 + 14 ln x, represents the perecentage of inbound e-mail... (answered by gonzo)

Suppose that the funtion P=12+50ln x represents the percentage of inbound e-mail in the... (answered by stanbon)

Suppose that the function P = 13+451n x represents the percentage of inbound email in the (answered by stanbon)

Suppose that the function P=12 +50 ln x represents the percentage of inbound e-mail in... (answered by Fombitz)

Suppose a function P=13+45 In x represents the percentage of inbound e-mail in the U.S.... (answered by Fombitz)

Suppose that the function P=13+45x represents the percentage of inbound e-mail in the... (answered by ankor@dixie-net.com)

5) Suppose that the function P=13+45ln x represents the percentage of inbound e-mail in... (answered by stanbon)