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Type: Posts; User: Dr_Calculus

1. ## Question: Bearings

by Dr_Calculus
3
Views
2,257

### What crocivic said is absolutely right. You just...

What crocivic said is absolutely right. You just hafta draw the triangle and plug in the data that you have. The actual name is the "Law of Cosines" but whatever. Remember, however, that a, b, and c...
2. ## Question: Algebra 2 help-factoring completely...

by Dr_Calculus
4
Views
5,170

### uh...

Now I have another question for you: what are the purposes of the b and the x? Are you supposed to solve for them? If you are, then they don't come out to be whole numbers.
3. ## Question: Chemistry

by Dr_Calculus
1
Views
3,387

### ??

CaCO4... this appears to be a type of mineral, but are you sure it isn't CaCO3? CaCO4 appears to be a mineral called aragonite, similar to calcite, which is CaCO3. Aragonite can be used in...
4. ## Question: Good citizenship

by Dr_Calculus
2
Views
827

### Good one

Hey, that's a good answer hank, you sure know how to stimulate that prefrontal cortex :)

Dr. Calc
5. ## Question: Undefined slope

by Dr_Calculus
2
Views
4,313

### mmmmmmm

an undefined slope is a vertical line, so this means that every point on the line has the same x-coordinate (horizontal coordinate)

Dr. Calc
6. ## Question: Algebra 2 help-factoring completely...

by Dr_Calculus
4
Views
5,170

### Huh?

I'm not sure what you want me to do with these numbers. 10000 and 625? What are those?
7. ## Question: Science Project

by Dr_Calculus
2
Views
2,519

### Yep

Sound can technically travel through ANY kind of medium (rock, glass, air, water, etc.). But it must have a medium because sound is a LONGITUDINAL wave, which means that particles vibrate side to...
8. ## Question: Parasitism

by Dr_Calculus
7
Views
20,059

### Yay!

It makes me happy that I answered correctly. Maybe I'll be able to pass my AP biology exam after all !
9. ## Question: Trigonometric ratios

by Dr_Calculus
1
Views
2,577

### let's see...

Well, [cot(x)+csc(x)]^2=cot(x)^2 + 2cot(x)csc(x) +csc(x)^2
now, let's sub in sin and cos in place of cot and csc.

cos^2/sin^2 +2(cos/sin)(1/sin)+1/sin^2

now, we add it up because denominators...
10. ## Question: Math help

by Dr_Calculus
4
Views
2,079

Uh, could you explain what u mean by r=4, r=3, p=64? I'm somewhat confused at what you are trying to say.
11. ## Question: Math help

by Dr_Calculus
4
Views
2,079

### I got number 2

This basically says that:
(2x-3)/3=(1-x)/5
10x-15=3-3x
13x=18
x=18/13
12. ## Question: Parasitism

by Dr_Calculus
7
Views
20,059

### I think termites actually is an example of...

I think termites actually is an example of parasitism in a deciduous forest, but I could be wrong. Biology is not my favorite science class :)
13. ## Question: A prize if you can answer this...

by Dr_Calculus
4
Views
1,522

### Lol

Yeah, that's true... I don't even know how to integrate by partial fractions yet... I'm still in calc AB. I do know how to integrate by parts though, I got bored in class. Nonetheless. I'm just too...

by Dr_Calculus
3
Views
1,153

### I'm not sure I understand what the situation is....

I'm not sure I understand what the situation is. The wind is blowing at the top of the hinge only? I don't think that would do anything to the door...
15. ## Question: Simple Rotational motion question

by Dr_Calculus
1
Views
2,503

### to the rescue!

Ok, here is your misunderstanding. On mass 1, there are two "forces" acting. The tension in the rope and the weight of the mass. We don't know the tension of the rope, so we called it T1. But we DO...
16. ## Question: Sinc(x) Pain

by Dr_Calculus
4
Views
1,843

### to explain...

I agree; I don't think that there's enough information to solve the problem unless there is some identity that I am unaware of... As for my criticism, I was just noting that we don't know whether y...
17. ## Question: Setting up equation?

by Dr_Calculus
2
Views
1,735

### yup

I think reinsuranc has the best method to do the problem... I guess if you want to state the solution more algebraically, we could say:

1/4 x +1/6 x = 1

where x is the number of hours needed...
18. ## Question: Pre-Cal

by Dr_Calculus
1
Views
4,009

Well, I guess you can say you're lucky that I roam the boards these days... I don't want to do all the work, so I'll just give you a start. First, you want to use radians, and not degrees, to find...
19. ## Question: Trigonometry question

by Dr_Calculus
4
Views
1,927

### It is solved! Eureka!

Phorze, I didn't see something very significant before. Notice that the square has a rt. Triangle OUTSIDE the 81m square, and a rt. Triangle INSIDE the square. Upon closer inspection, I found the two...
20. ## Question: Methodology

by Dr_Calculus
2
Views
1,752

### Being from a foreign country...

It is often much easier for the students if you use lots of hand motions and more concrete gestures. Remember that different languages say the same thing differently, so I think your goal is mainly...
21. ## Question: Right Triangle

by Dr_Calculus
4
Views
5,396

### easier way

An easier way to solve this problem is to use a bit of intuition. A square is a rectangle with the greatest amount of area for fixed amounts of material (for example if you had x amount of fence and...
22. ## Question: Percent changes

by Dr_Calculus
2
Views
3,949

### Well...

If we assume a uniform distribution of the data, then 411/100,000 *100 is the percentage of inmates at the end of 1995 and 476/100,000 *100 is the percentage of inmates at the end of 2002. This...
23. ## Question: Trigonometry question

by Dr_Calculus
4
Views
1,927

### nice job

Good job phorze, I missed the fact that the corner was in the center. If you draw the diagonal of your 81ft square, then we will have the lengths of both the line connecting the two rt. Angles and...
24. ## Question: Math Problem: Worker Efficiency

by Dr_Calculus
3
Views
4,913

### Yeah, on top of that, it's a really vague...

Yeah, on top of that, it's a really vague problem... how do we determine efficiency?
25. ## Question: Increasing knowledge

by Dr_Calculus
5
Views
3,397

### I agree with slater in this regard. However, I...

I agree with slater in this regard. However, I feel one other important thing is to get your children to realize that their education is important. Once they get their priorities straight, they will...
26. ## Question: Never too old...

by Dr_Calculus
6
Views
2,115

### To disagree

First off, I think it is always worth going through the education. Way back in the 1600s, scholars were treated with the utmost respect (despite ridicules of their theorems). If you try to start your...
27. ## Question: Has it been too long?

by Dr_Calculus
2
Views
2,319

### No way!

I can't say that I've been in your position because I'm still a high school student. However, I know that you should never, ever admit defeat. I take calculus, and EVERY time I hit a bump, there is...
28. ## Question: Math word problems

by Dr_Calculus
3
Views
8,973

### But...

Yes, it is a simple pythag problem. Let's give this problem a bit of a twist though. Let us assume that the tip of the ladder is slipping down the wall at a rate of 1 foot per second. How fast is the...
29. ## Question: Trigonometry question

by Dr_Calculus
4
Views
1,927

### The key to this problem is finding the area of...

The key to this problem is finding the area of overlap. This can be done by connecting the two vertices that are right angles. This will create two triangles. If you can find the values for each...
30. ## Question: Math=dreamhouse flooring

by Dr_Calculus
3
Views
1,319

### What do you mean by "flooring"?

What do you mean by "flooring"?
31. ## Question: Sinc(x) Pain

by Dr_Calculus
4
Views
1,843

### Maybe not

You can't choose just any value for x and y since we have no knowledge of x and y being parts of a function, in which a specific x value would correspond to a specific y value.

by Dr_Calculus
3
Views
4,979

### Method

Well, I haven't done Alg. 2 in a while, but I can give you the correct method for doing math problems in general. The following steps work for almost any problem, from algebra 1 to calculus
1) state...
33. ## Question: Can't use Scandisk! Help!

by Dr_Calculus
18
Views
2,248

### Problem fixed

Well, my problem finally got fixed, although I'm going off to college in a few months, so I'll be leaving future problems to siblings to quarrel over, but I know about dts11's problem. Usually, the...
34. ## Question: Can't use Scandisk! Help!

by Dr_Calculus
18
Views
2,248

### Trying things still

Well, I've tried booting in safemode and all that good stuff. I'm running ME, and I know I should probably upgrade my system, but I don't understand why something would lock my hard drive... It...
35. ## Question: Can't use Scandisk! Help!

by Dr_Calculus