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## #1 Re: Introductions » new member » 2006-02-09 06:19:25

heh tyybo is a screen name ive had for a long time. someone called me tyybo once, i suppose because it sounds like tae bo which sounds like tyson(my real first name) and yah, i suppose that would be its origin

and im very happy you have a chopper for sale heh

## #2 Help Me ! » Improper Integration is so fun.. » 2006-02-09 06:13:51

tyybo
Replies: 1

Hey all. Im hoping i can find someone who really loves their calculus because i definetly have some. Any way this is the problem

Ok so im working with some probability type issues. and the first problem looks like this

Suppose that X is a continuous random variable over the interval 0,infinity with associated density fu8nction f(x)=0.03e^kx, k is just some constant.
Calculate the Probability that X will be greater then 100. Result involves the constant K

So after some gritting i figured this part out. I know the entire probablility has to equal 1 for 100 percent. and being that you cant really figure out infinity i decided to do the integral of 0-100 of the density function. and i got that whole mess to be

1 times .03e^k*100    minus       1 times .03e^k*0
K                                               k

Now i need to find k which is really messing with me.
I got a hit from my teacher to use an improper integral(not erally sure on what this is)

any way this is how he has me set up and this is where im stuck

the integral of 0 to "b" of the density function=       .03    e^k*x evaluated from 0-b
k
and then he has written what happens as b approaches infinity.  So now, im pretty lost, so any one who relaly wants to take the time to read this, id really appretiate it. thanks all!

## #3 Re: Help Me ! » Applied Calc... » 2006-02-07 15:56:22

ryos wrote:

Find someone in your class that has the CD and copy it.

Yeah that would work but i was hoping to come across it this evening

## #4 Help Me ! » Applied Calc... » 2006-02-07 12:40:34

tyybo
Replies: 3

Well this class is a lot more of a burden then i was initially expecting. The first one was cake walk. but the second one is a lot more difficult. Im here right now in a very far attempt to aquire the info trac cd with an assignment thats due in the morning. the cd conviently disappeared out of my book so now im SOL. If anyone can email me the list of practice problems out Applied Calculus II 3rd edit byWaner/Constenoble I would appretiate it greatly. Thanks!

## #5 Introductions » new member » 2006-02-07 12:36:43

tyybo
Replies: 13

Hello All. I am a biotech student at North Dakota State University in Fargo. Im having some difficulty with calculus so im hoping to gain something off this board.