Sunday

November 23, 2014

November 23, 2014

Total # Posts: 1,424

**math**

Take any digit, say 2. Multiply it by 10. What's the last digit? Multiply that by anything else. What's the last digit?
*September 23, 2009*

**math**

It's a very simple pattern, really. :-) Think what happens to the last digit of any number when multiplied by ten.
*September 23, 2009*

**calculus**

Oops, I didn't calculate the intercepts. My bad.
*September 23, 2009*

**calculus**

I wonder if the second question isn't a little more mean and evil than that? :-) The parabola is upturnd, symmetrical around x=0, like a rounded hill. A tangent to that parabola that forms a side of an equilateral triangle as described would be of the form +/-sqrt(3)x + c...
*September 23, 2009*

**math**

Answered below
*September 22, 2009*

**math**

Answered below
*September 22, 2009*

**college math statistics**

I agree with you on A and B. C: You know that P(over 65) = .12 and the question states that 40% of this group take 5 or more prescriptions. Can you take it from there? D: First figure: 1) How many people under 65 use 5 or more prescriptions and 2) How many people over 65 use 5...
*September 22, 2009*

**math statistics/probability**

Answered above
*September 22, 2009*

**Algebra 1**

Call the number of miles x. Every trip costs at least 1.50, so we can call that a constant that we add to every trip. It is also the only fare if the trip is two miles or less/ In addition to that, every trip over two miles costs an extra 1.20 * x, except for the first two ...
*September 21, 2009*

**algebra**

There is no single "solution" to this equation. You can see that easily: 9 + 3 * 1 = 12 6 + 3 * 2 = 12 so this does not specify a unique x or y, but for any given x, there can be only one y. In fact, it specifies an infinity of (x, y) pairs, that, if you graph them, ...
*September 20, 2009*

**math**

I'd go for "negative y-values are reflected in the x-axis", but my terminology may be out of date.
*September 20, 2009*

**Math**

Apart from the subject, that equation isn't going to peak for x > 0. I think you may have an error in the question.
*September 20, 2009*

**Math**

First, 5:00, 120 minutes, is right. You can do this without algebra. In fact, algebra would only complicate it. In the jargon, 120 is the lowest common multiple (LCM) of 40 and 60. That means that it's the smallest number that both divide into evenly. 40, 80, 120 60, 120 ...
*September 20, 2009*

**Physics - heat**

1 caloris is the amount of energy needed to raise the temp of 1g or water 1 degree. So if it raises 50g by 28 deg, that's how many calories? OK, so we know how many calories affected the water, but we are also told that the burning was only 40% efficient, which means that ...
*September 20, 2009*

**physics**

You're very welcome, Mary. Sometimes, just sometimes, a picture, or graph, or video, is worth much more than a thousand words.
*September 20, 2009*

**physics**

When the rivet goes in, let's say its length is L. As it cools, it shortens a little, so its length is now L-delta(L). But it's holding the two plates, so as it shortens, it pulls them together just a little, by the amount delta(L). What you're thinking is that its...
*September 20, 2009*

**physics**

Consider the amount of contraction in cooling - in _both_ directions. The cross-sectional contraction is a minor negative, but the rivet is much longer than its cross-section, so the contraction along its length is proportionally greater. And, remembering that the rivet is ...
*September 20, 2009*

**Logarithums?**

I don't see why you have to convert it; they are indeed the same thing. I want to draw a graph for this, but I can't :-) In general, you can use the rule that ln(1/x) = -ln(x), so you can simply declare that and be done. I'll try to show an equivalence so it might ...
*September 20, 2009*

**science**

For more details, look up "Newton's law of universal gravitation" on Wikipedia, but the gist is that the force between the Earth and the Moon depends on the product of the masses divided by the square of the distance, and then thetre's a factor g that is ...
*September 20, 2009*

**math**

I think this is not the full question?
*September 20, 2009*

**math**

The brackets mean that you need to add the 8 and the 7 first. 8 + 7 = 15. Now multiply that 15 by 3, and multiply that answer by 2.
*September 20, 2009*

**math (algebra)**

40
*September 20, 2009*

**Algebra I**

Call the numbers A, B and C We know A + B + C = 147 We are told that: B = 2 A + 4 (two times the first number and add 4) and C = 3 A - 5 (five less than three times the first number) This is called substituting. Now we can substitute (2 A + 4) for B whenever we see it. Using ...
*September 19, 2009*

**Science**

What might be the differences between liquids in a mixture? They might have different... what? Boiling points? Freezing points? Density, which in liquids we often measure as specific gravity. If it's a mixture, the two liquids will very probably have different boiling ...
*September 19, 2009*

**physics**

Sorry, missed your followup earlier. I get the numbers you do, but something is funny with the question. h = 3.40t^3 anything with a t^3 term isn't acceleration; it's jerk. Constant jerk, in fact, that would have the chopper well into outer space in 60 seconds! Sorry, ...
*September 19, 2009*

**physics**

How high is the chopper after 2.05 s? call it H H = 3.4 * 2.05^3 m Now from that height, it drops something. I assume we're not taking air resistance into account here, or the question would be much longer. I don't know how accurate the measuure your class uses for g, ...
*September 19, 2009*

**latin**

ad lib. is short for ad libitum meaning at will (more or less) et alia, shortened to et al. (et = and, alia = others) versus (against) gets cut to vs. (why is abbreviation such a long word? :-) Quod (which) vide (see) gets shortened to q.v. cf., short for confer, means compare...
*September 19, 2009*

**physics**

Assume the particle starts at x=0. What is the position after 2.3 s? x = (50 * 2.3) + (10 * 2.3^2) That's how far it has travelled in 2.3s From there the average velocity is easy, I think
*September 19, 2009*

**math**

Scientists and mathematicians tend to avoid pie charts, because humans have a harder time judging angles and areas than line lengths. The Wikipedia page on Pie_charts, which I just visited, shows examples of a pie chart with apparently equal-ish segments that show up as ...
*September 19, 2009*

**physics**

Is the question average speed? Assuming average speed, you must find total distance, then total time, then divide them Time is easy: 24 + 36 + 44 + 13 minutes So how far do you get driving 24.0 min at 63.0 km/h? 36.0 min at 45.0 km/h? 44.0 min at 49.0 km/h? 60 min at 63 kph ...
*September 19, 2009*

**math**

How you present the pie chart is kind of up to you, unless you were given specific instructions. You could put the numbers of deaths, or the percentages, or both. Apparently I can't put a link here, but if you go to the Wikipedia page Pie_chart you will see typical examples.
*September 19, 2009*

**math**

The numbers are close, but not exact since for example alcohol is about 12.6 rather than 13, but yes, you've clearly got it - but be careful; those numbers are degrees, not percent Alcohol is about 3.5%, and that makes about 12.6 degrees of a circle
*September 19, 2009*

**math**

Ayup! 54120 total deaths 510 from murder will be represented by about 3.4 degrees of the circle
*September 19, 2009*

**math**

A useful approach is to take a simpler case Suppose there were just 5 by murders, 30 by accidents, and 65 by tobacco How many would all the deaths add up to? What proportion of all deaths would be by tobacco? So there were 100 deaths, 65 by tobacco So tobacco would be 65% of ...
*September 19, 2009*

**Technology**

What about the zipper? Always my favorite tech story. :-) Or the camera phone? Quite recent, and there's a great story about its invention, which you can find in several places.
*September 19, 2009*

**math**

Multiply both sides by d^2 F(d^2)=G(mM) Divide both sides by F (d^2)=G(mM)/F Now take the square root d = SQRT(G(mM)/F)
*September 19, 2009*

**math**

Well, you have a) one variable per entity, and they are b) discrete rather than continuous, and c) within a reasonable range; the largest is no more than 80 times as big as the smallest, so you won't go wrong with a simple linear graph - column or bar chart. If you had two...
*September 18, 2009*

**college**

If cashews cost $5.00 per pound and peanuts cost $1.50 per pound how do I write the formula to determine how many pound of cashews to mix with 30 pound of peanuts so that the mix will sell for $3.00 per pound.
*September 14, 2009*

**accounting**

The Landis Corporation had 2008 sales of $100 million. The balance sheet items that vary directly with sales and the profit margin are as follows: Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5% Accounts receivable...
*September 7, 2009*

**math**

9/14divided by 15/28
*August 18, 2009*

**crt/205**

Controlling Irrational Fears After 9/11* We present this selection as an example of a fairly well-reasoned argumentative essay. There is more here than arguments—there’s some window dressing and you’ll probably find some slanters here and there as well. You ...
*June 22, 2009*

**1st grade**

My room is a mess. Mom said, "I have to clean it now."
*June 16, 2009*

**1st grade**

My room is a mess. Mom said, "I have to clean it now."
*June 16, 2009*

**1st grade**

thanks
*June 16, 2009*

**1st grade**

friend
*June 16, 2009*

**1st grade**

one syllable inside, many, friend
*June 16, 2009*

**1st grade**

Let's plant a tree by Mr. Olsons fence. is that a sentence
*June 16, 2009*

**Science**

Which direction do meridians run and what do they measure?
*June 7, 2009*

**Physics**

The charge on the door must be electrically neutral. If the door were positively or negatively charged, the electrons in the balloon would be repelled from or attracted to the door, making the overall charge on the door side of the balloon negative or positive, and then the ...
*May 20, 2009*

**calculus**

A rectangle has its base on the x-axis and its upper two vertices on the parabola y=12−x2 . What is the largest area that the rectangle can have
*May 19, 2009*

**calculus**

You are planning to make an open-top box from an 12 in by 12 in piece of cardboard by cutting congruent squares from the corners and folding up the sides. What are the dimensions (of the 3 sides) of the largest volume you can make this way?
*May 19, 2009*

**math help please**

There are 9 one-to-one correspondences possible (2 sets of 3, thus 3^2)
*May 18, 2009*

**History**

If the 13th, 14th, and 15th Amendments, which were passed almost 100 years earlier, guaranteed that African-Americans had the right to vote, why was legislation such as The Voting Rights Act of 1965 necessary? 1) States were passing laws that discouraged or disqualified ...
*May 8, 2009*

**History**

All of the following are examples of how a local jurisdiction may have tried to inhibit African-Americans from voting prior to the Voting Rights Act, except: Poll Taxes Literacy Tests Intimidation and Violence Skin Color Comparison Tests Is the answer poll taxes?
*May 8, 2009*

**math**

Evaluate: 3^2 + 2^2 x 5 - sqrt 25 over 8 - 4 / 2 + 2 I am confused on the order in which I solve this. Please help!
*April 29, 2009*

**Finance**

The market allocates capital to companies based on:
*April 22, 2009*

**Math**

y=2x+3 How do you find the inverse of this function? I know that you have to get the x by itself but i am not sure how.
*April 14, 2009*

**Engineering**

Can someone please help me with this problem? In order to reduce the material cost, an engineer decides to use a hybrid beam instead of an all-carbon fiber beam. Both beams have the same overall dimensions with rectangular cross-sections. The hybrid beam contains carbon fibers...
*April 14, 2009*

**crt 205**

Final Project
*April 12, 2009*

**Physics**

I have to design a laboratory activity to answer the question, "What is the relationship between the diameter of a circle and the area of the circle?" My teacher said to use a previous activity as a templete to help me. For the previous activity you had to find the ...
*April 1, 2009*

**physics**

As shown below, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that the pendulum bob will...
*March 22, 2009*

**English**

Can harrowed mean worried? In the dictionary, I'm only finding that it has to do with farming, but in the context I see it in, it looks like it'd mean worried.
*March 15, 2009*

**English**

What does the word innuendo mean in this context: the air is alive with chatter and laughter and casual innuendo. None of the dictionary definitions make sense.
*March 14, 2009*

**Trivia**

Unscramble these 5 letters to form a St. Patrick's Day term? FETSA
*March 8, 2009*

**chemistry**

its c3ho5
*March 6, 2009*

**7th grade science**

i did the same question its 20 60 120
*March 6, 2009*

**Composite Materials**

Thank you very much.
*February 26, 2009*

**Composite Materials**

Can someone please help with this problem? A burnout test was performed to determine the volume fractions of constituents in a glass/epoxy composite. The following observations were made: Weight of empty crucible = 47.6504 g Weight of the crucible and small piece of composite...
*February 26, 2009*

**french**

what is government in french? thanks, you will help me with my dissertation greatly xx
*February 17, 2009*

**french with japanese**

what lives in a stable
*February 17, 2009*

**biology**

i've only got like ten minutes so if anyone knows please HELP.
*February 16, 2009*

**biology**

37-40 please
*February 16, 2009*

**biology**

h ttp://i726.photobucket. com/albums/ww263/fornss/b iology2.jpg?t=1234820797 (remove spaces)
*February 16, 2009*

**CACULUS**

dy/dx = (y-1)^2 cosπx There's a horizontal line with equation y=c that satisfies this differential equation. Find the value of c.
*February 11, 2009*

**Warren Hills**

How do I solve y-5=3x
*February 10, 2009*

**CACULUS- EXPONENTIAL GROWTH**

A population of animals in an ecological niche is growing in time so that it's rate of growth dp/dt is related to its current size by the differential equation dp/dt = 900/p^2. If time is measured in years and initially there are P(0) = 10 animals present, find the ...
*February 9, 2009*

**spanish**

YOU USE THE PRETERITE, NOT THE IMPERFECT!!!! ERA SHOULD BE FUE!!!!!
*February 9, 2009*

**Macroeconomics**

Is the slope of the savings equivalent to the size of the multiplier
*January 31, 2009*

**Macroeconomics**

Would Interest on both government and corporate bonds would be included as part of interest income in determining the GNP by the income approach
*January 30, 2009*

**Precalc**

REMEMBER LOG BASE A X = Y!!!!! THAT IS THE RULE, NOW FIND THE LOG WITH WHAT I GAVE U IF U CANT FIND IT OUT TOO BAD, I AM NOT DOING UR HOMEWORK, BUT I CAN HELP U!!!
*January 26, 2009*

**CALCULUS**

THAT IS A VIRUS
*January 26, 2009*

**CALCULUS**

Find the x-coordinate of the absolute minimum of f(x) = x^3 - x^2 - x +1 on the interval [-2, 2] The function f(x) = x^3 - 2x^2 is increasing on which of the following intervals? a)x<0 only b)x>4/3 only 0<x<4/3 d)x<0 or x>4/3 e)x<0 or x>3/4
*January 26, 2009*

**7th grade**

features that define the performance of a system are called what?
*January 7, 2009*

**Calculus(Derivative of ln)**

I get everything, but I can't seem to crack this one out, only one I got problems on.. -sqrt[x^2 +1]/x + ln(x + sqrt[x^2 + 1])
*January 5, 2009*

**English help!!**

After selecting your quote, write a statement explaining your choice. Define your statement and discuss its importance to your life. Your statement must be at least half page in length. Express yourself!! This is my quote: I'm not lazy. I'm energy efficient. I am sorry...
*January 5, 2009*

**CALCULUS**

AN EQUATION OF THE LINE NORMAL TO THE GRAPH OF Y= SQRT[3X^2 + 2X] AT (2, 4) IS??
*January 2, 2009*

**economics**

RELATIVE DEMAND AND COMPETIVENESS OF US EXPORTS
*January 2, 2009*

**Walquist**

Geometry question. a Math riddle. What does a cat need to play baseball?
*December 8, 2008*

**Physics help!**

I need to know all of the equations for WORK problems (Physics). I'm not sure where to find them. if someone could help id appreciate it.
*December 7, 2008*

**Finance**

attempt an insight into- two of the most popular techniques of calculating or evaluating the profitability of a project, which are the internal rate of return (IRR) or its modified internal rate of return (MIRR).
*October 29, 2008*

**college**

With an equation p(X=x)=e to the-lambda *lambda to the x/x how do you isolate for lambda if you know p ?
*September 28, 2008*

**math**

1 kilometer =
*September 19, 2008*

**Math**

the 100,000th place
*September 17, 2008*

**Macro Economics**

I think it is false because the number of units purchased would have to change to stay at equilibrium level without creating a shortage?? I think?
*September 10, 2008*

**Macro Economics**

If supply increases and demand increases, the the price must drop while the number of units purchased may remain unchanged. T or F?
*September 10, 2008*

**Macro Economics**

If the price of Honda ATV's increased while the number sold increased, then what must have happened in the market?
*September 10, 2008*

**english**

What is the refrain in Sir Patrick Spens, the Wife of Ushers Well, and the Bonny Earl of Murray?
*September 10, 2008*

**English**

dropale
*September 5, 2008*

**algebra**

isolate x first by adding one to both sides you should get 3x=12 divide both sides by 3 to get x=4 then substitute and get (4)^2 + 4
*July 26, 2008*

**Java Help**

I am just starting out in programming. If someone could help me with these assignments, it would be greatly appreciated. "Write a Rectangle class. This class represents Rectangles. Each Rectange has the X and Y coordinates of its center point (as doubles) and its width ...
*May 21, 2008*

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