Saturday

September 5, 2015
Total # Posts: 2,517

**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*

**Math Analysis**

3.Each day the average toddler needs to consume 900 to 1700 calories. At most 30% of a toddler's total calories should come from fat. Describe the number of fat calories and total calories for the diet. Is a toddler following a healthy diet if s/he consumes 1200 calories a...
*October 5, 2009*

**Grade 7 Math**

I do not know how to figure out the pattern, but when you do you can justify your answer by saying multiplying all the numbers together is exactly the problem "99!" which you can punch in to a calculator. I hope this is right and makes sense :/
*October 5, 2009*

**12th grade chemistry**

h2o means water haha
*October 4, 2009*

**spanish **

what does this mean? que les gusta hacer a ustedes los sabados y domingo? what does that mean?
*October 1, 2009*

**8 grade math**

how can you express a number in expanded form and in scientific notation?
*September 30, 2009*

**4th grade**

In a fifth grade class of 16 students, one-half of the students arrived at school early,one-fourth arrived on time, and one-eight arrived late. On that day how many were absent? Solve using comparison bars.
*September 30, 2009*

**8th grade math**

how can you use prime factorization to determine the LCM and GCF of two numbers?
*September 30, 2009*

**Chemistry**

Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
*September 29, 2009*

**Chemistry**

You did... I only posted one question today, which was earlier
*September 29, 2009*

**Chemistry**

I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
*September 29, 2009*

**Chemistry**

Thank you so much
*September 28, 2009*

**Chemistry**

I know I just posted that question, I got answer from someone but they didnt show me how to work the problem, so I wasnt asking if you could show me how.
*September 28, 2009*

**Chemistry**

I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
*September 28, 2009*

**Honors Chemistry**

Thanks so much!!!! :D
*September 28, 2009*

**Chemistry**

Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
*September 28, 2009*

**algebra**

You're welcome! :)
*September 24, 2009*

**algebra**

Isolate the variable x onto one side of the equation: 6-2x = 6x-10x+14 -2x = 6x-10x+8 (subtract 6 from both sides) -2x = -4x+8 (add 6x and -10x) 2x = 8 (add 4x to both sides) x = 4 (divide each side by 2)
*September 24, 2009*

**Algebra**

I got 1 / x^2, or x^-2.
*September 24, 2009*

**algebra 3**

Zeros are also "x = ..." statements, so x = -2 + i, x = -2 - i, etc... Since you need REAL coefficients in the polynomial, change the x = -2 + i and x = -2 - i statements to "clean" polynomials, like this: x = -2 + i x + 2 = i (square each side to get rid ...
*September 24, 2009*

**math**

That's correct. Here's the check: -(-16)/2 + 4 = 12 16/2 + 4 = 12 8 + 4 = 12 12 = 12
*September 24, 2009*

**Literature**

Look on the definition for the word "audacity" on the Merriam Webster website. An example they give is "Her worst audacities did not seem to surprise him. - Edith Wharton".
*September 24, 2009*

**math**

You're welcome :)
*September 24, 2009*

**math**

All you have to do here is isolate the variable x on one side of the equation. Soooo start with substraction, like this: Ax + Hy = L Ax = L - Hy Now, to get rid of the coefficient A to isolate just the variable x, you have to divide both sides by A. (since A is technically ...
*September 24, 2009*

**math**

Search for "multiplication using box method" without quotes online and there's a good site by The Centre for Innovation in Mathematics Teaching.
*September 24, 2009*

**Honors Chemistry**

In my vocabulary crossword puzzle, I have one clue answer left to fill in the puzzle, but the clue doesn't match anything that even EXISTS: 9. A group 18 element (on the periodic table) Answer so far: N??E?????S NONE of the group 18 elements fit in here, though. And I ...
*September 24, 2009*

**math**

I just substituted in numbers from 0-9 to see what the answer was. "3AA1 is divisible by 9" means that the problem 3AA1 divided by 9 will equal an integral number. So, once you substitute in numbers you'll find that 3,771 divided by 9 equals 419, so A = 7. Hope ...
*September 24, 2009*

**Algebra**

-5/6b=-|-20| How do I solve for b? Thank you!
*September 24, 2009*

**Honors Chemistry**

Yes, the answer you gave me for the first one was exactly what I needed -- sorry I didn't make it clear enough as to what I needed :( lol. I totally understand both explanations! Thanks!! :D
*September 22, 2009*

**Honors Chemistry**

I'm doing what's called "test repair" for my class where we correct the answers we got wrong on the test. In order to get points back, however, we have to explain WHY that answer is the correct one. Can someone help me with these? 39. Nuclear forces exist ...
*September 22, 2009*

**math anaylsis**

oh okay :)
*September 22, 2009*

**math anaylsis**

x(132-3x) is the same exact thing as 132x-3x^2. x(132-3x) represents the area of the two pens together, with the length being 132-3x and the width being x.
*September 22, 2009*

**math anaylsis**

I just asked this same exact question yesterday, maybe we're in the same class! lol THIS IS WHAT I WROTE + REPLIES: "A rectangular pasture is subdivided into two equal pens. Using the barn as one side and 132 m of fencing for the rest, find the value of x that gives ...
*September 22, 2009*

**Precalculus**

Ohhhh I totally get it now!!! Thanks! :D
*September 22, 2009*

**Precalculus**

"A rectangular pasture is subdivided into two equal pens. Using the barn as one side and 132 m of fencing for the rest, find the value of x that gives the maximum area, and A(x)." It gives no diagram whatsoever, so I have no idea if all the sides are the same length ...
*September 22, 2009*

**Honors Chemistry**

Oh I see. Like ordering the energy levels of the elements, right? Like elements with red flames have a lower energy level than an element with a violet colored flame..
*September 20, 2009*

**Honors Chemistry**

We did a lab in class on Friday where we stuck a metal loop in various chemicals and stuck it in the flame of a Bunsen burner and we observed the flame's colors as the different metals went in. For every lab we do, we have to write a writeup which involves a graph. How ...
*September 20, 2009*

**science**

I think it's Melvin Calvin :)
*September 20, 2009*

**Precalculus**

Ohhhh duh!! I can't believe I totally overlooked that. Thanks Reiny!! :D
*September 20, 2009*

**Precalculus**

"Show that x^6 - 7x^3 - 8 = 0 has a quadratic form. Then find the two real roots and the four imaginary roots of this equation." I used synthetic division to get the real roots 2 and -1, but I can't figure out how to get the imaginary roots. I checked HotMath but...
*September 20, 2009*

**MATH 157**

Use the midpoint formula: x coordinate: (1st_x + 1st_y)/2 y coordinate: (2nd_x + 2nd_y)/2 So you could put it into an equation like this: 2 = (0 + x)/2 (for the x coordinate) -8 = (0+ y)/2 (for the y coordinate) I know it may have seemed confusing how I wrote it out, so please...
*September 20, 2009*

**AP English 11**

Ohhhhh I totally get it!! Thanks SraJMcGin and Ms. Sue! :D
*September 17, 2009*

**AP English 11**

Tomorrow in class, we have to write an essay about the play "The Crucible". This was the prompt our teacher gave us: "How was the play true? 1)when it was written 2)about when it happened 3)today as it is read" Does ANYONE understand this prompt and what it...
*September 17, 2009*

**Precalculus**

I'm HOPING this is the last problem I need help on.. :-/ List the possible rational zeros of f using the rational zero theorem. f(x) = 2x^3 - x^2 + 5x + 6 I applied the rational zero theorem, but none of the factors worked :(
*September 17, 2009*

**Precalculus**

Ohhh I see. Thanks so much!! :D
*September 17, 2009*

**Precalculus**

"An aquarium with length x, width x-10, and height x-5 holds about 750 cubic feet of water. Find all real solutions of the equation (I wrote it) 750 = x(x-10)(x-5)." I got the volume equation correct, right? I've tried dividing the factors of -750 by the factors ...
*September 17, 2009*

**Precalculus (algebra review)**

Omg. I feel like an idiot *bangs head against wall*. Soooo it would be (3x-2)(9x²+2x+4)?
*September 16, 2009*

**Precalculus (algebra review)**

grrr i mean [2/3]x in the middle of the second equation
*September 16, 2009*

**Precalculus (algebra review)**

Never mind, I think I just got it xD is this what it looks like factored out? (x - 2/3)(x^2 + [2/3] + 12)
*September 16, 2009*

**Precalculus (algebra review)**

My mind is coming to a blank as to how to factor out this polynomial: 27x^3 - 8 Any help is greatly appreciated!! :D
*September 16, 2009*

**Pre-Algebra**

1. 33 2. -26 3. 40 4. -69 5. -16 6. 12 7. -82 8. 33 9. 72 10. -43 11. 99 12. -73 13. 76 14. 181 TADA!
*September 15, 2009*

**Algebra**

13 is 76
*September 15, 2009*

**Algebra**

WHAT IS 13!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*September 15, 2009*

**Pre-Algebra**

I am awesome!!!!
*September 15, 2009*

**Geometry**

Find the value of the variable and VW if V is between U and W. UV=2,VW= 3x, UW=29 UV = r, VW = 6r, UW =42 UV = 4p - 3, VW = 5p, UW =15 UV = 3c+29, VW = -2c-4, UW = -4c Need a site to explain how to do these. Teacher not clear on explaining.
*September 15, 2009*

**Precalculus**

Never mind, I figured it out xD
*September 15, 2009*

**Precalculus**

"If 2 is a zero of a polynomial function f(x), name a factor of f(x)." Any help is greatly appreciated! :D
*September 15, 2009*

**Precalculus**

For our homework we had to read this one section which demonstrated the location principle (just in case this has a different name, I'll post it here:) "If P(x) is a polynomial with real coefficients and a and b are real numbers such that P(a) and P(b) have opposite ...
*September 14, 2009*