# Search results

1. ### UNLV Comp Sci - How is it?

I'm looking to transfer to University of Nevada Las Vegas. I've read that the local casinos snatch up CS majors like heroin brownies. Can anybody offer any other input to keep in mind? I've checked and they're ABET accredited. I'm currently attending University of Arizona which was ranked in...
2. ### Comp Sci Java Help: Decimal Format Class

Yes I tried it: Exception in thread "main" java.lang.IllegalArgumentException: Malformed pattern "000'-0000" at java.text.DecimalFormat.applyPattern(DecimalFormat.java:2610) at java.text.DecimalFormat.<init>(DecimalFormat.java:435) at PhoneNumberGenerator.main(PhoneNumberGenerator.java:15)...
3. ### Comp Sci Java Help: Decimal Format Class

I tried that, and it threw an exception. PhoneNumberGenerator.java:15: error: illegal escape character DecimalFormat df = new DecimalFormat( "000 \- 0000" ) I ended up separating the number thusly: number = r.nextInt( 10000000 ) ; part1 = number / 10000 ; // this gets the first three...
4. ### Comp Sci Java Help: Decimal Format Class

Homework Statement Problem: Tele-Annoy, a telemarketing company has asked you to write a program that when given the area code to dial, generates the next three potential telephone numbers, and then outputs them to the screen for one of their sales representatives to call. Use the area code...
5. ### Find Exponential Equation from data points

... and a few seconds after I posted this, I realized that we're using the wrong variable. X instead of t, and it works. Rage! Rage factorial
6. ### Find Exponential Equation from data points

Hi guys I'm helping my girlfriend with her Calc 1 homework and we seem to be stuck on this one problem. Am I missing something obvious? Homework Statement Homework Equations P = P_0 a^t \frac{5}{20} = \frac{P_0 a^1}{P_0 a^{-1}} \frac{1}{4} = a^2 a =...
7. ### Finding the net field strength due to a line of charge

The most frustrating part is that I apparently was correct the first time, but the answer they wanted was positive rather than negative. But looking at the problem, the vector is clearly negative in the X and Y directions!
8. ### Finding the net field strength due to a line of charge

So I talked to my Physics professor, and he took a look at it. Evidently I forgot to carry over an x. Why the solution is positive still confounds me.
9. ### Finding the net field strength due to a line of charge

I literally pasted all the information I was given. >.< Do you have any guidance as to how to figure out what coordinate system I should use?
10. ### Help me understand μ!

Think of mu (μ) as the magnitude of how much an object cancels out the forces trying to accelerate it. There are two mu values for any object. The static and kinetic friction coefficients. Static is the resistance for an object to acceleration, kinetic is the resistance to acceleration after...
11. ### Finding the net field strength due to a line of charge

I want to apologize ahead of time for my apparent inability to get LaTeX to display properly. Homework Statement λ = 3.8 x 10^(-6) C/m R = 32m r = magnitude of the hypotenuse (the book's convention, a poor choice IMHO) r = \sqrt{R^2 + x^2} k = 8.988 x 10^9 P:(0,-32) cosθ = x/r a→∞...
12. ### Evaluating a Series

Homework Statement First, I'd like to thank everybody a head of time. You guys have been an enormous help. Second, I don't mind telling you that I'm finding sequences and series extremely frustrating. I usually pick this stuff up like nobody's business. My problem is attached, but I will copy...
13. ### Approximations rules of a function

It took some mathematical gymnastics, but I eventually got the right number. I'm running into a strange problem with these rules. I don't seem to need to multiply by dx for some reason I can't fathom.
14. ### Approximations rules of a function

I think you were absolutely right, Mark but I plugged this in but I'm getting something just above 0.3, which is way too low.
15. ### Approximations rules of a function

Thanks, Mark44. I must have transcribed my trapezoid rule incorrectly. Thanks for the clarification on my midpoint rule. I'm gonna give that a try!
16. ### Approximations rules of a function

Homework Statement Given the following integral and value of n, approximate the integral using the methods indicated (round your answers to six decimal places): \int_0^1 e^{-3x^2} dx n = 4 (a) Trapezoidal Rule (b) Midpoint Rule This is the only one I'm having trouble...
17. ### Average Velocity and Average Speed of Integral

I should have had that on the top of my head! Duh!
18. ### Find the integral of annoying

Welcome to the wonderful world of integrals! There are times when I want to kick small, defenseless animals because of this stuff. I usually listen to some thrash metal while studying math. I don't know why, but it helps! Try to remember as many identities as you possibly can. It makes life a...
19. ### Average Velocity and Average Speed of Integral

Homework Statement An object moves with velocity v(t) = −t2 +1 feet per second between t = 0 and t = 2. Find the average velocity and the average speed of the object between t = 0 and t = 2 Homework Equations \frac{1}{b-a} \int_a^b f'(x) dx avg value of a function The Attempt...
20. ### Volume of a boat problem

Agreed. Tip of the hat to Mark44!
21. ### Volume of a boat problem

lol, I forgot the units and the 10,000. Thanks a ton! You've been a great help.
22. ### Volume of a boat problem

So now I'm finishing the evaluation: Original: V = 2L [Hx - \frac{a}{3} x^3]^{\sqrt(\frac{H}{a})}_0 V = 2L [H{\sqrt(\frac{H}{a})} - \frac{a}{3} {\sqrt(\frac{H}{a})}^3] V = 2L [H{\sqrt(\frac{H}{a})} - \frac{a}{3} \frac{H}{a} {\sqrt(\frac{H}{a})}] V = 2L...
23. ### Volume of a boat problem

I don't see where L and H are specified. The only information that it gives you is that 1 m3 of water is 10000 newtons. L and H are constants, but they're not specified. As far as I can tell, H is where y = (a constant) and provide the upper limit of the the top of the boat, but is not...
24. ### Volume of a boat problem

Homework Statement The design of boats is based on Archimedes' Principle, which states that the buoyant force on an object in water is equal to the weight of the water displaced. Suppose you want to build a sailboat whose hull is parabolic with cross section y=ax2, where a is a constant. Your...
25. ### Area between two graphs

Homework Statement Find the area of the region enclosed between y=4sin(x) and y=2cos(x) from x=0 to x=0.8pi. Homework Equations \int^{0.8\pi}_0 dx g(x) = 4\sin(x) f(x) = 2\cos(x) The Attempt at a Solution This problem needs to be split up into two parts...
26. ### I don't understand! f=ma So far so good

Your acceleration is your change in velocity over time. So if you started at v0 = 5 m/s and accelerated to v= 6 m/s you would have acceleration. If you constantly move 5 m/s, you have acceleration = 0. So if we plugged this into the equation, Force = mass (0) If you have zero...
27. ### Help getting projectile motion equations straight in my head

Homework Statement In the figure, you throw a ball toward a wall at speed 26.0 m/s and at angle θ0 = 37.0˚ above the horizontal. The wall is distance d = 17.0 m from the release point of the ball. (a) How far above the release point does the ball hit the wall? What are the (b) horizontal and...
28. ### Solve for x

You're right about going around in circles. (x) 1= \frac{2^{x+1}}{x} (x) x= 2^{x+1} \ln(x)= \ln(2^{x+1}) \ln(x)= x \ln(2) + \ln(2) \ln(x) - \ln(2) = x \ln(2) \frac{\ln(x)}{\ln(2)} - 1 = x This will give you an x = something, but you still have x in both sides of the...
29. ### Riemann Sum from Indefinite Integral

You're right! I can't believe I forgot this. Thanks dynamicsolo! btw, That's some great advice in your signature. For future reference, \sum_i^4 \frac{3}{x} + 2 \rightarrow Right (i)(\frac{n}{7-3})[f(3) + f(4) + f(5) + f(6)] Left (i)(\frac{n}{7-3})[f(7) + f(4) + f(5) + f(6)]
30. ### Difficult Indefinite Integral (substitution problem?)

gb7nash, I went back and fixed that problem. Hey guys, thanks to all of you! You've been a great help.