Sunday

April 19, 2015

April 19, 2015

Total # Posts: 2,473

**Math Analysis**

What is the apparent size of an object 1 cm long held 80 cm from your eyes? ==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle by ...
*January 6, 2010*

**English**

Thank you so much Ms. Sue!!
*January 5, 2010*

**English**

I need help with prepositional phrases. I’m given sentences and I’m supposed to rewrite them changing the position of the prepositional phrases so that the sentences are not confusing. If they are already correct, I’m supposed to write correct. I made ...
*January 5, 2010*

**English**

I need help with prepositional phrases. I’m given sentences and I’m supposed to rewrite them changing the position of the prepositional phrases so that the sentences are not confusing. If they are already correct, I’m supposed to write correct. I was wondering ...
*January 5, 2010*

**10th grade**

I am writing an essay on things from the natural world and I need to think of categories for the things in order to write paragraphs. The sun, moon, sea, and sea shore are all things from the natural world. What one smaller category do they fit in?
*January 3, 2010*

**English**

I am writing an essay on things from the natural world and I need to think of categories for the things in order to write paragraphs. The sun, moon, sea, and sea shore are all things from the natural world. What one smaller category do they fit in?
*January 2, 2010*

**Pre Cal**

If log 3=A and log 5=B express Log 75 in terms of A and B. (using the Law of Exponents)
*December 22, 2009*

**Precalculus**

If f(x) = ab^x where a > 0, b > 0, and b is not equal to 1, then b is called the _______________ of the exponential function. Any help is greatly appreciated!! :)
*December 14, 2009*

**Math**

It helps to draw out what the photo in the frame will look like, so you'll draw a rectangle with length "L" and width of "L + 2" (because it says the width [think w] is 2 more than the length "L"). Now, it says a border of 1 in. is placed ...
*December 14, 2009*

**Math -- HELP!!!!**

y + 5y = 90 6y = 90 y = ? Divide each side by 6 and you get your answer.
*December 10, 2009*

**Math Analysis**

31. Radioactive decay of material is determined using the formula N = Noe^-kt. Find the constant k for Plutonium-239 given that its half-life is 24,390 years. ==> I don't really get where to start here because the problem does not give you how much Plutonium-239 there ...
*December 10, 2009*

**math**

What's your question?
*December 10, 2009*

**math**

You're welcome! :)
*December 10, 2009*

**math**

I mean the piece he has is 1/2 yard long, not half of the 3/4-yard one. oops sorry! lol
*December 10, 2009*

**math**

Yep! :)
*December 10, 2009*

**math**

Multiply 3/4 by 2/3 to get the piece Robert needs: (3/4) * (2/3) = ? If you don't have a calculator, cross multiply so the 3s cancel out and the 2 goes into the 4 twice...leaving you with an answer of?
*December 10, 2009*

**math**

An ordered pair consists of an x-coordinate and a y-coordinate, like (x,y). Sooo, you can just start picking random values for x and plugging it in to the equation to get a y value. For example, if you were to plug in 3 for x, you would get: y = 20 + x/3 y = 20 + 3/3 y = 20 + ...
*December 10, 2009*

**9th grade**

Convert milligrams to grams to make it easier: 1 milligram = 0.001 gram Convert kilograms to grams as well so you have the same units: 1 kilogram = 1000 grams Divide kilograms (1000 grams) by milligrams (0.001 grams) to get your answer.
*December 10, 2009*

**algebra**

In this case I would use the method of synthetic substitution, but since I never learned this technique 'til this year in Precalculus, let's stick with long division: 1) Write out the problem like an elementary division problem, with the bar over the 4m^2-9m^2...+7 and...
*December 10, 2009*

**Physics**

1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
*December 9, 2009*

**Social Studies?**

What were churches like in England/Britan during the 1800's?
*December 9, 2009*

**Physics**

if a car travels at 50 km/h, it has kinetic energy. How much more kinetic energy does it have at 100 km/h? Answer=100 squared as much (10000)
*December 9, 2009*

**Physics**

1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
*December 9, 2009*

**Precalculus**

Ohhh I see. Thanks Reiny this helped a lot!! :)
*December 8, 2009*

**Precalculus**

Solve the equation x^3 - 2x + 4 = 0. ==> I know the answer is -2, but I can't seem to remember how to solve these by hand without using a graphing calculator. Any help is greatly appreciated!! :)
*December 8, 2009*

**english**

good, great, nice, and wonderful.
*December 8, 2009*

**Math**

This is the question given: "Peanuts sell for $5/kg and cashews for $20/kg. Mary wants to sell a mixture of peanuts and cashews for $12/kg. How many kilograms of peanuts and cashews would Mary have to mix in order to make 30kg of the $12/kg mixture?" This is an ...
*December 8, 2009*

**Precalculus**

Ohh never mind, I found my error. I feel kinda stupid now though lol
*December 7, 2009*

**Precalculus**

Find the vertex, focus, and axis of symmetry of the parabola x^2-10x-8y+29 = 0. ==> I do it over and over and over, but I keep getting the same answers of (5,4) for the vertex, (5,6) for the focus, and x = 5 for the LOS, but according to this one website, everything except ...
*December 7, 2009*

**English**

I need help identifying verbs in a passive and active voice. 1. Masai, a people of East Africa, live in kraals, or small villages. (Verb=live, A) 2. The village is surrounded by a thick round fence. (verb=is surrounded, P) 3. The kraal contains about 10 to 20 small huts. (verb...
*December 5, 2009*

**6th grade**

How do you draw a cross section showing your disign for a pharaohs tomb?
*December 2, 2009*

**Social Studies**

IT IS ABOUT EQUAL
*November 30, 2009*

**language**

Ronald has a goldfish. His goldfish weights 12 lbs. If Ronald feeds the gold fish 2 ounces of food every hour and the fish gains 2 ounces each hour,how many pounds would ronalds goldfish weight in 5 days?How many lbs of food does the goldfish eat in a week?
*November 30, 2009*

**Precalculus**

Ohhhhh!!!!! This totally makes sense. I forgot to multiply the 4 by 25 before bringing it over to the other side. Thanks so much!! :D
*November 23, 2009*

**Precalculus**

"Sketch the ellipse. Find the coordinates of its vertices and foci. 34. x^2 + 25y^2 - 6x - 100y + 84 = 0 (Hint: Complete the squares in x and y. Begin by writing the equation in this form: (x^2 - 6x + ___) + 25(y^2 - 4y + ___) = -84.)" ==> I used the hint that ...
*November 23, 2009*

**Precalculus**

A rectangle is inscribed in a circle of radius 4 centered around the origin. Write a function A(x) for the area of the rectangle. ==> I have no idea how to do this. Can someone help me please? Thanks!!
*November 19, 2009*

**History**

So I am doing a power point assignment for my history class on Needle Distribution Programs and need some help. I need to have what it is, basic background of it,How it is important, and how it is/has changed American history. I have a lot of the information but need some more...
*November 17, 2009*

**geography**

1. Which of the following problems is not a result of Egypt's growing population? A overcrowded cities B emigration of educated professionals to other countries C a diminishing food supply D widespread unemployment Is it D? 2. What is a major reason for the failure of West...
*November 17, 2009*

**Math Analysis**

5. The bacteria population doubles every 10 hours. How long will it take to triple the initial amount? (Use log 3 / log 2 = 1.585) ==> I thought you could use the formula A(1/2)^(t/h), but I don't know... Any help is GREATLY appreciated!! :D
*November 16, 2009*

**us history**

the state of Utah, being predominatley LDS decides to pass law that requires all students across the state to attend a Mormon church meeting once a week. If students neglect to attend this meeting, that will be suspended from school ad will not graduate from high school. Can ...
*November 15, 2009*

**Physics**

A projectile is launched vertically from the surface of the Moon with an initial speed of 1130 m/s. At what altitude is the projectile's speed three-fourths its initial value?
*November 15, 2009*

**physics**

A toy train track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis (see the figure). A toy train of mass m = 2.5 kg is placed on the track and, with the system initially at rest, the electrical power is turned on. The train ...
*November 9, 2009*

**Honors Chemistry**

Oops, I mean I got 49 g Mg for number 4.
*November 8, 2009*

**Honors Chemistry**

On the same subject as before with the limiting/excess reagent stuff -- can someone please check my answer to make sure I'm doing it right? Thanks sooooo much!! :DD 3. Mg + 2HCl ==> MgCl2 + H2 -- What mass of hydrogen at STP is produced from the reaction of 50 g of Mg ...
*November 8, 2009*

**Honors Chemistry**

This makes perfect sense, except I don't quite understand why you have to multiply the 3 moles of H2 by 2 in the last step...
*November 8, 2009*

**Honors Chemistry**

"How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol N2/14.0 g N2) x (2 mol NH3/1 mol N2) x ( 17.0 g NH3/ 1 mol NH3) = 68 g NH3 25 g H2 x ( 1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x (17 g NH3...
*November 8, 2009*

**chemistry**

.520
*November 6, 2009*

**Honors Chemistry**

Can someone check my first answer and help me with the second question? Thanks so much!! :D 1. N2 + 3H2 ==> 2NH3 : How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? ==> I got 37.5 grams. 2. How much of the excess reagent in Problem 1 ...
*November 5, 2009*

**3rd grade**

The sum is the number you get from two numbers, so: 198 + 864 = ? Start by writing the two numbers on top of each other: 198 864 ---- Now, starting from the right, add the numbers and carry over the tens whenever it applies. Sooo when you start adding: _1_ 198 864 ---- ___2 (...
*November 5, 2009*

**Math **

No problemo! :)
*November 5, 2009*

**Math **

For the first problem, I calculated the answer to be $519.82: net price = original price * net price factor To calculate the net price factor with a chain discount of 10/10/5, subtract each percentage from 100%: 100% - 10% = 90% 100% - 10% = 90% 100% - 5% = 95% Now, multiply ...
*November 5, 2009*

**science grade 10**

The (aq) stands for aqueous solution, and FeSO4 can either be named duretter or iron (+2) cation sulfate.
*November 5, 2009*

**Honors Chemistry (stoichiometry)**

Can someone check and make sure I'm doing these problems right? Thanks so much!! 1. N2 + 3H2 ==> 2NH3 : How many moles of hydrogen are needed to completely react with two moles of nitrogen? ==> I got 6 moles. 3. Zn + 2HCl ==> ZnCl2 + H2 : How many moles of ...
*November 4, 2009*

**Essay for AP English**

Grr here's my essay: “Sinners in the Hands of an Angry God” and “Beauty of the World” are two powerful sermons delivered by Jonathan Edwards, but they convey completely different meanings. In both homilies, Edwards utilizes the use of lexicon and syntax...
*November 3, 2009*

**Essay for AP English**

Would someone be willing to critique and edit my essay? Thanks so much! PROMPT: Read the two sermons "Sinners in the Hands of an Angry God" and "Beauty of the World" by Jonathan Edwards. Compare and contrast the rhetorical strategies of tone, lexicon, and ...
*November 3, 2009*

**physics**

A metal can containing condensed mushroom soup has a mass of 269 g, a height of 14.7 cm, and a diameter of 6.79 cm. It is placed at rest on its side at the top of a 3.34 m long incline that is at an angle of 22.4o to the horizontal and is then released to roll straight down. ...
*November 3, 2009*

**physics**

A metal can containing condensed mushroom soup has a mass of 269 g, a height of 14.7 cm, and a diameter of 6.79 cm. It is placed at rest on its side at the top of a 3.34 m long incline that is at an angle of 22.4 degrees to the horizontal and is then released to roll straight ...
*November 1, 2009*

**physics**

What linear speed must a 0.0495-kg hula hoop have if its total kinetic energy is to be 0.113 J? Assume the hoop rolls on the ground without slipping.
*November 1, 2009*

**physics**

A Ferris wheel with a radius of 9.61 m rotates at a constant rate, completing one revolution every 34.1 s. Calculate the magnitude of a passenger's acceleraton when at the top of the wheel.
*November 1, 2009*

**physics**

When it is 10:00, the hour hand on an analog clock is 300 degrees ahead of the minute hand. How many minutes elapse (to three significant digits) before the minute hand next points in the same direction as the hour hand?
*November 1, 2009*

**AP English**

Would you consider the sermon "Sinners in the Hands of an Angry God" by Jonathan Edwards to be a homily?
*November 1, 2009*

**Geometry**

I need help on a geometry proof!!!! If Line AB is parallel to Line DC and Line BC is parallel to line AD, prove that angle B is congruent to angle D. The picture is basically a square or parallelogram with line DC on the Top and Line AB on the bottom, and as u can tell A and D...
*November 1, 2009*

**calculus**

22.85 cubic cm per second
*October 29, 2009*

**almerican history**

What 1764 act prohibited the colonies from printing their own money?
*October 27, 2009*

**Geography**

What is the weight of air called?
*October 27, 2009*

**MATH ANALYSIS**

What I did for mine (and you know we're in the same class, so don't steal my idea! :P) was I found a graph comparing the thrusts of two rocket engines with the force versus time. Hope this gives you an idea!
*October 26, 2009*

**Honors Chemistry (check answers)**

Ohhhh, I think I get what you mean. Thanks!! :)
*October 26, 2009*

**Honors Chemistry (check answers)**

On a worksheet we got, we have to balance out chemical reaction equations then define what kind of reaction it is (synthesis, decomposition, single/double-replacement). Would someone be willing to check my answers, please? Thanks!! 1. c) BaO + H2O ==> ________ (synthesis...
*October 26, 2009*

**physics**

On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.19 kg sled is pulled with a horizontal force of 38.4 N, it begins to move with an acceleration of 2.39 m/s2. The 23.8 kg child accelerates too, but with a smaller acceleration than that of the ...
*October 25, 2009*

**spanish**

after school i help around the house and study.
*October 25, 2009*

**Math Analysis**

Ohhhhh, I think I get it now. Thanks jim! :D :D
*October 24, 2009*

**Math Analysis**

The 4 in front of the sqrt is like the 4th root, like 3sqrt(... is the cubed root, etc.
*October 24, 2009*

**Math Analysis**

6. Prove that f(x) = (3/4)x^4 + 2 and g(x) = (4sqrt(108x-216))/3 are inverses. I know you solve it with composite functions f(g(x)) and g(f(x)), and I solved f(g(x)), but I can't seem to solve g(f(x)) to equal x, like it should. Can someone show me how to solve this? ...
*October 24, 2009*

**science**

some facts about the marine biome
*October 23, 2009*

**Math Analysis (again)**

Never mind, I think I finally figured it out!
*October 20, 2009*

**Math Analysis (again)**

I'm having sooo much trouble understanding this stuff. I understood what was explained to me earlier, but I just can't seem to get a grasp on this stuff. ------------------------------- Given f(x) as shown, graph the following: [the line goes through the points (-2,-3...
*October 20, 2009*

**Science**

Using a stopwatch.
*October 20, 2009*

**Science**

You could take a guess to see how fast the hamster completes the maze. Then, after your experiment, you could state whether or not your hypothesis was correct.
*October 20, 2009*

**Math Analysis**

Ohhhh that makes PERFECT sense! :D I'm soo glad I get this now. Thanks so much!! :)
*October 20, 2009*

**More help? :(**

Ohhhh I get it :) I have like two more questions though -- 3. f(-2x) ==> Would you multiply the x- and y- coordinates by -2? I'm soooo confused :-/ And for number 8, the graph is a parabola instead, with the vertex at (0,0), and the "arms" of the parabola ...
*October 20, 2009*

**Math Analysis**

Given f(x) as shown, graph the following: [the line is going through (-2,-3) and (2,0)] 1. f(x) + 2 ==> My graph I have is a line going through the points (-2,-1) and (2,2). Is this correct? 2. 2f(x) ==> Can someone help me with this one please? I thought the 2 in front ...
*October 20, 2009*

**8th grade**

To make the trip there and back home, it's 77 miles x 2, so total Lori is going to have to drive 154 miles. To find out how many gallons she'll need, divide 154 miles by 28 mpg. Soooo she'll need 5.5 gallons EXACTLY to make the roundtrip.
*October 19, 2009*

**Honors Chemistry**

Thank you soooooo much for all your help!!!! The worksheet you hyperlinked to was EXACTLY what I needed. Thanks again! :D :D
*October 19, 2009*

**Honors Chemistry**

Can someone please explain to me how to use the stock naming system when naming chemical/ionic compounds? I reeeeaaaally do not get it. Here's some examples: 1. CaCO3 ==> I know the answer is calcium carbonate, but how is it that answer? 2. FeSO4 ==> The answer is ...
*October 19, 2009*

**english**

When outlining the theme of a short story in a single paragraph, what should it include? And how long should the paragraph be?
*October 19, 2009*

**Math Analysis**

Tell if the function is symmetric with respect to the x-axis, y-axis, and origin. 3. 8x^2 - 2y^2 = 12 ==> I got that it was symmetric to both the x- and y-axes. Is this right? 4. 5x^2 - 3y^2 = 18 ==> I can't get anywhere with this equation -- I'm getting the ...
*October 19, 2009*

**writing**

Bernard Evslin's Ulysses? I haven't really over come cunning enemies.
*October 18, 2009*

**writing**

I'm writing an essay about the character Ulysses. I need to make a personal connection with him, though I'm not sure how?
*October 18, 2009*

**Math Analysis**

Ohhh that makes perfect sense! I don't see how I couldn't see that before. Soooo the answer would be g(h(f(x))), right? Thanks for your help!! :D :D
*October 14, 2009*

**Math Analysis**

Let f(x)= x^3, g(x) = sqrt x, h(x) = x-4, and j(x)= 2x. Express the following function k as a composite of three of these four functions. k(x)= sqrt (x^3 - 4) Do I need to factor anything out of the parentheses or something? If you can, please explain this problem to me :) any...
*October 14, 2009*

**arithmetic**

0.22 divided by 7.02
*October 14, 2009*

**writing skills**

It is letter A, because the chairman is DOING the telling, which is active voice. In letter D, the chairman is being ACTED UPON by the verb "told", which is passive voice. Does this make sense?
*October 13, 2009*

**Honors Chemistry**

Can someone check my work please? Thanks :)) 2. Write the formulas for the compounds formed between the following: g. Cu+2 and NO3- (the +2 and - are superscripts, while the 3 is a subscript) ===> I got Cu(NO3)2. h. NH4 and SO4(2-) (the two 4's are subscripts, and the (...
*October 13, 2009*

**Math Analysis**

4. Find f(x) + g(x) when f(x) = x^(1/2) and g(x) = 6x^(1/2). ===> I got the square root of 7x. Is this right? 16. Find f(x)/g(x) when f(x) = (2x)^(1/2) and g(x) = 2*(sqrt2)*x^(1/3). ===> I got (sqrt2x) / (3*cubertx), but I definitely don't think this is right....if ...
*October 12, 2009*

**12th grade Economics**

The chapter states that the elderly population in the U.S. is growing more rapidly than the total population. In particular, the number of the total workers is rising slowly, while the number of retirees is rising quickly. Concerned about the future of Social Security, some ...
*October 12, 2009*

**Honors Chemistry**

Ohhhh, I get it now. Thank you so much!! :D
*October 7, 2009*

**Honors Chemistry**

We did the gold penny lab, where we bathed a copper penny in a hot zinc-NaOH mixture to turn it a silver color, then we heated that in a flame to turn it a gold color. There are two questions that go with this lab that I don't understand, however: 4. Did the copper and ...
*October 7, 2009*

**math**

The distributive property means you DISTRIBUTE a number/variable to other numbers in a set of parentheses. So, in this example, you would distribute a to b, c, and d to get this: a => b a => c a => d ab + ac + ad
*October 6, 2009*

**Math Analysis (similar to my previous question)**

Thanks for all your help on both problems!! :)
*October 6, 2009*

**Math Analysis (similar to my previous question)**

How would you set this one up as well? 5. You have up to $30,000 to invest. Your broker recommends investing in AAA bonds yielding 8% and B+ bonds yielding 12%. You decide to invest at most $12,000 in the B+-rated bond and at least $6,000 in the AAA bond. The amount invested ...
*October 6, 2009*