Recent content by Love_to_Learn

Not much. I think I figured out why sigma is what it is though. Since the SD is 2 grams, it follows that V(X) = 4. Since I'm trying to find out what the average of X is, I divide 4 by 25. that is how I get the 4/25. From there sigma is easy. I think that is kind of close anyway.

Homework Statement The weight of eggs produced by a certain type of hen varies according to a distribution that is approximately normal with mean 6.5 grams and standard deviation 2 grams. What is the probability that the average of a random sample of the weights of 25 eggs will be less than...

You were exactly correct. That is what I was doing. Thanks for the replies everyone.

Alright, then I am not understanding how to find a displacement vector. I thought that the displacement of a vector was the same as its magnitude. How is finding the displacement of a vector somehow different than finding the magnitude of a vector?

1. Cavers spelunked 2.6 km westward, 3.9 southward, and 25 meters upward. What is their displacement vector? Homework Equations The Attempt at a Solution - The formula for the magnitude of a vector which is sqrt of [(3.6)^2+(2.9)^2+(0.025)^2] ≈4.623 km

That's what I've been needing to begin to cement this concept! Thank you for your very precise use of language.

Homework Statement Why Does 0 Velocity and Negative Acceleration = Increasing Speed? Homework Equations None The Attempt at a Solution I am using Halliday and Resnick (5th Edition), and the anwer key in the back says that speed is increasing at the point when velocity is zero...

Ok, so since the value of the second derivative at pi is a negative value, then the acceleration is negative.? So If I start with f(x)=cos(x), then f''(x)=1 so then the acceleration is positive. Right?

Sorry for being dense, but I am just not real sure what you are getting at. If f(x) = sin(x), the value of pi at f'(x) is -1, but the slope is 0, so there is zero velocity. (Do I have it right so far?) I am not understanding what it gets me to compute the value of f'(pi). The value of...

1. I need to create a graph of a position function where a particle at point pi, has zero velocity, and positive acceleration. 2. Homework Equations f(x)=sin(x); f'(x)=cos(x); f''(x)=-sin(x) 3. Attempts at a Solution If I choose sin(x) as my function, then velocity is zero at...

Those are good thoughts. I am laboring under a couple of assumptions, and please feel free to correct me if I am wrong. One is that calculus is essentially the framework for classical physics. So regardless, I am going to be working my way through a college physics textbook. I figure it sure...

Cool! Is the Rudin book on real and complex analysis a textbook for the math class "real analysis"? Or is that something different. I am going to take real analysis eventually, but I will wait until I am working. My first goal is to get highly qualified under N Child Left Behind to teach...

I am becoming a secondary math teacher, and have completed Calculus III, and proofs. Within about a year to a year and a half, I will have combinatorics, abstract algebra, an advanced course in statistics and probability, Diff EQ, Linear algebra, and a couple of others completed. I have been...