Friday

July 3, 2015

July 3, 2015

Total # Posts: 154

**Math**

A new fence is constructed on three sides of a housing block with area 240 m2. The fourth side facing the road is left open. If 52 m of fencing is used, what are the dimensions of the block?
*March 29, 2015*

**Algebra**

rational
*March 26, 2015*

**Math**

An open-topped box is constructed from a piece of cardboard with a length 2 cm longer than its width. A 6 cm square is cut from each corner and the flaps turned up from the sides of the box. If the volume of the box is 4050 cm3 , find the dimensions of the original piece of ...
*March 24, 2015*

**Calculus**

Thank you. :) I was wondering, did you break up the fractions and then integrate it?
*February 9, 2015*

**Calculus**

Can someone show me a step by step process, along with explanations on how to do this problem? Thank you. :) Evaluate the integral ∫ [(x^2 - 1)/(x^2 + 1)]dx?
*February 9, 2015*

**Physics**

I don't really know where to start on the problem. Would I use V = k(q/r)? But what would I do afterwards. Much explanation on how to go about the problem is much appreciated. Thank you. 1) Three point charges are arranged at the corner of a square of side l. What is the ...
*February 8, 2015*

**Calculus**

Thank you so much. Although for problem number 1, I realized that I inputted it incorrectly (having problems with my + key). It is actually: 75/(1+6e^0.2x) = 30 Would I still solve it the same way but subtract 1 to the other side?
*January 31, 2015*

**Calculus**

Hello, I really need help on these two homework problem. >< In problem #1, I believe it is related to the exponential functions and their derivatives section...in Calculus II? So, surely there should be a ln in the solution as well? I would like a step by step process ...
*January 31, 2015*

**Science Help!**

I think you are right.
*November 12, 2014*

**PLEASE HELP ASAP Language Arts**

Us tutors won't do your work for you. We are happy to check your answers but we won't give you the answer.
*November 10, 2014*

**Math**

I think she would have 12 choices because: She has four colors: 4 She can choose three: 3 4 * 3 = 12
*November 5, 2014*

**data analysis w/spreadsh w/lab**

The outcome of what?
*November 4, 2014*

**Math**

Anytime
*November 4, 2014*

**Math**

Yep
*November 4, 2014*

**Math**

So, you have to do the same thing like in th last question. 20 * .10 =??
*November 4, 2014*

**math**

I am not completely sure, Laura but I think the answer would be feet.
*November 4, 2014*

**MGMT**

Yeah, Ms. Sue is right. You definitely need to include those factors into it
*November 4, 2014*

**MGMT**

Well, if you set a good example, or if you aren't rude to any of the worker, they will respect you better. Their is a higher chance of the workers treating the manager with respect if the manager is kind and hard working like all the other workers.
*November 4, 2014*

**Math**

You're welcome, Amy
*November 4, 2014*

**Math**

Well, there is 4 trees in the park.
*November 4, 2014*

**Math**

This is how I wold solve this: 9 * .45 = ? Use a calculator or something to figure it out. Hope I helped. :)
*November 4, 2014*

**Math**

Yes
*November 4, 2014*

**Math**

The equation would be 16/12 because there are twelve boxes and all of them added up together would be 16. So you would write your equation like this: 16/12 = 1.33... and so on.
*November 4, 2014*

**Math**

Okay. I got it. I know how to do this question now.
*November 4, 2014*

**Math**

Oh, wait. I'm sorry. Hold on. I got this wrong. I hope you aren't mad. Let me re read the question.
*November 4, 2014*

**Math**

Okay, good. So you have $1.92 per box So your equation that you would put down would be...?
*November 4, 2014*

**Math**

Okay, so you have twelve boxes of pencils. Lets say this: $ was one box of pencils Well, you have twelve so... $ $ $ $ $ $ $ $ $ $ $ $ each of those boxes cost 16 bucks. So what is 16 * 12?
*November 4, 2014*

**Science 8**

What about the third law?
*October 8, 2014*

**Science 8 **

How are Newton’s second and third laws of motion important to your everyday life? Please help me! I've looked everywhere and I can't seem to find an answer.
*October 8, 2014*

**math**

If you had $3.00, but you used $4.00 how much would you have left?
*October 8, 2014*

**math**

Do you need help solving the problem?
*October 8, 2014*

**math**

-11 is your answer
*October 8, 2014*

**Calculus**

Oh wow, thank you so much!
*May 27, 2014*

**Calculus**

Find all values for c in the intercal (1,4) so that the slope of the tangent line at (c,f(c)) equals the slope of the secant line through (1,1/3) and (4,2/3) where f(x) = x/(x+2) 1 </ x </ 4 (<-- that is suppose to be the less than or equal to sign) I'm not sure ...
*May 27, 2014*

**chemisrty**

A solid acid is dissolved in enough water to make 200 ml of a solution. 40.0ml of the solution is titrated to a phenolphthalein en point with an NaOH solution. The neutralized solution and the remainder of the acid solution are then mixed and the PH of the resulting solution ...
*April 16, 2014*

**chemistry**

Propionic acid has a ka of 1.3x10^(-5), 50.0ml of a buffer solution having a pH of 4.65 is to be prepared using a 0.20 M solutions of propionic acid and sodium propionate. How many ml of each of these solutions must be mixed? Thanks in Advanced !
*April 16, 2014*

**Biology**

How does diving bradycardia reflex help explain why we can survive after falling into cold water and being submerged for long periods of time? Give a physiological reason that explains the relationship between lung size and body size. From a physiological perspective, why is ...
*March 24, 2014*

**Statistics**

Never mind, figured it out :)
*February 28, 2014*

**Statistics**

Two of the biggest soft drink rivals, Pepsi and Coke, are very concerned about their market shares. The pie chart that follows claims that PepsiCo's share of the beverage market is 25%. Assume that this proportion will be close to the probability that a person selected at ...
*February 28, 2014*

**Statistics**

Nevermind! I figured out what I did wrong!
*February 27, 2014*

**Statistics **

Let X be a binomial random variable with n = 100 and p = 0.2. Find approximations to these probabilities. (Round your answers to four decimal places.) P(17 < X < 28) I get the answer as 0.7059 but it is wrong. I can't seem to figure this out... Help please
*February 27, 2014*

**Math**

Is -4+2y=-2 a direct variation, and if it is what is the constant?
*December 2, 2013*

**Biochemistry **

1. What is the overall charge of the tripeptide below pH 1.0? 2. What is the overall charge of the tripeptide at pH 12? 3. What type of intermolecular attractions could the side chains of the amino acids make with the solvent (water) at pH 7.4? (Note that these are attractions...
*October 5, 2013*

**Chemistry**

100 mL of 1.0 M formic acid (HCOOH) is titrated with 1.0 M sodium hydroxide (NaOh). The Approximate pKa is 4 At the pKa, what fraction of the carboxyl group will have been converted to COO-?
*September 27, 2013*

**Chemistry**

Thank you very much!
*September 23, 2013*

**Chemistry**

Select the statements that correctly describe buffers.? 1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. 2) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution. 3) The pH of a ...
*September 23, 2013*

**Chemistry**

Thank you so much, it makes a lot more sense now! :)
*June 21, 2013*

**Chemistry**

Using the reaction and the E∘ given below 2Co^3+(aq)+2Cl^−(aq)→2Co^2+(aq)+Cl2(g) E∘=0.46 V what is the cell potential at 25 ∘C if the concentration are [Co^3+]= 0.565M , [Co^2+]= 0.554M , and [Cl^−]= 0.838M and the pressure of Cl2 is PCl2= 8...
*June 21, 2013*

**math **

use the given zero to find the remaining zeros of the function: F9x)=x^3-5x^2+4x-20; zero:2i I don't get it. Can someone please show me what to do with this?
*March 27, 2013*

**Statistics **

The number of traffic accidents per day on a certain section of highway is thought to be Poisson distributed with a mean equal 2.19. Based on this, how many traffic accidents should be expected during a week long period? a. 15.33 b. 10.95 c. approximately 10.36 d. ...
*October 10, 2012*

**Statistics **

A sample of 50 values produced the following summary statistics: Q1 = 10, Q2 = 14.6, Q3 = 16.7 and x = 15.3. Based on this information, the left and right ends of the box in a box and whisker plot are, respectively, a. 10 and 14.6 b. 14.6 and 16.7 c. 10 and 16.7 d. 5.3 and 32....
*October 10, 2012*

**Physics**

A football was thrown from the line of scrimmage with a velocity of 30 m/s at an angle of 30o above the horizontal. (a) Determine the time required by the ball to reach the maximum height of its flight path. (b)Determine the distance from the line of scrimmage that a receiver ...
*June 24, 2012*

**Physics **

A 0.2 kg baseball located at the top of a building which is 100 m above the ground is thrown with an initial velocity 30 m/s at an angle of 30o above the horizontal. (a) Determine the total energy which the ball will have just after the instant that the ball is thrown. (b) ...
*June 24, 2012*

**Physics HELP PLZ :(**

A 2.0 kg mass is placed in front of a spring (K = 40 N/m) which has been compressed to its maximum of 20.0 cm. (a)If the spring is released, determine the velocity of the mass at the instant that the spring is only compressed 10.0 cm. (b) Determine the velocity of the mass ...
*June 24, 2012*

**Physics**

During a training exercise a cannon ball is fired with a muzzle velocity of 84.9 m/s at an angle of 45o above the horizontal. Determine how far from the cannon the ball will land when it hits the ground.
*June 23, 2012*

**Physics**

A 0.22 calibre rifle shoots a bullet of mass 1.8 g with a muzzle velocity of 500 m/s. If the barrel is 25 cm long, what is the average force exerted on the bullet while it is in the barrel?
*June 22, 2012*

**math**

Cohen has consistently averaged 120 yd. of horizontal distance with his 7-iron over the last two years playing golf. His ball flight typically reaches a maximum height of 24 yd. (Hint: A rough sketch will help you) a.) Create a function in vertex form that relates these ...
*June 5, 2012*

**Math **

Two consecutive integers are squared. The sum of these squares of these squares is 545. What are the integers?
*June 5, 2012*

**Math**

A bridge over a river is supported by an arch. The function that describes the arch us h(x) = -0.0274x^2 + 1.34033x, where h(x) is the height, in metres, of the arch above the water at any distance, x, in metres, from one end of the bridge. Could a sail boat with an 18m mast ...
*June 5, 2012*

**Calculus**

Thanks a lot, it makes so much more sense now! :)
*June 5, 2012*

**Calculus**

Differentiate x^2y^3+x^3y^4=11 implicitly to find dy/dx.
*June 5, 2012*

**6th grade history**

thank you
*May 19, 2012*

**6th grade history**

so the mound builders lived in North America???
*May 19, 2012*

**6th grade history**

Where did the mound builders live???
*May 19, 2012*

**history**

1) Romans elected leaders to make _______. 2) The ________ wrote the laws on the 12 Tables.
*May 17, 2012*

**Biology**

What are the similarities of the evolution of birds on hawaiian islands and the finches on the Galapagos?
*April 30, 2012*

**Biology**

What are the similarities of the evolution of birds on hawaiian islands and the finches on the Galapagos?
*April 30, 2012*

**Chemistry - Half-life**

Phosphene decomposes to phosphorus and hydrogen in a first order mechanism. 4PH3(g) --> P4(g) + 6H2(g) This reaction's half-life is 35.0 s at 680 degrees C. If you had 520 mmHg of phosphene in an 8.00-L flask, how long does it take for the pressure in the flask to rise ...
*April 25, 2012*

**Math**

A contact lens has a spherical shape and pretend it is being held on a finger ready to put into an eye. (All measures are in millimetres.) Suppose we take the semi-circular cross-section through the middle of the lens. Find the equation of the lens if the centrepoint of the ...
*April 13, 2012*

**Biology**

Suppose that black hamsters were found to be 70% of the population and the gray hamsters 30% of the population. Calculate the percentage of BB, Bb, and bb hamsters in the next generation. - I don't know how to calculate the percentage of the genotypes.
*March 26, 2012*

**chemistry**

Balance each of the following redox equations using the half-reaction method. HI(s) + H2SO4 (aq) --> H2S(g) + I2 (s) My only question about this equation is...how do I know how many electrons I need to put on both sides? Other than that I know how to do it.
*February 25, 2012*

**Chemistry**

Thank you so much! :)
*February 21, 2012*

**Chemistry**

If you mix 20.0 mL of 1.00 x 10-4 mol/L NaCl with 20.0 mL of 2.00 x 10-6 mol/L AgNO3 will a precipitate form ? If it does it will be AgCl, which has a Ksp of 1.80 x 10-10. i'm not quite sure how to figure this out...
*February 21, 2012*

**Chemistry**

I'm not sure how to use the collision theory to explain the decreasing temperature, increasing concentration, and when adding a catalyst on the rate of a chemical reaction.
*February 21, 2012*

**Chemistry**

Explain, using collision theory, the effect of decreasing temperature on the rate of a chemical reaction. Explain, using collision theory, the effect of increasing concentration on the rate of a chemical reaction. Explain, using collision theory, the effect of adding a ...
*February 21, 2012*

**Chemistry**

A chemical reaction taking place on the surface of a block of sodium will not occur faster if the a. size of the block doubles b. block is cut in half c. surface area is increased d. amount of sodium is decreased
*February 21, 2012*

**chemistry**

Consider the following reaction: 2 NO(g) + O2(g) ---> 2 NO2(g) + energy if the number of moles of oxygen is increased to two moles, the a. reaction speeds up b. reaction slows down c. temperature increases d. temperature decreases I'm not really sure what the answer to ...
*February 21, 2012*

**Algebra**

Could someone help me reason this equation out? It stumped me. 3x +x(x-1)=0 I can only come up with 0 but I know it is more indepth than that. Thanks.
*September 1, 2011*

**Algebra**

Hi I don't understand how you are getting the y intercept. I am so confused about which numbers are solutions, vertex, x-intercepts, y-intercepts etc. Can you write out an example of an equation and how you get each number from a formula. I have been in this class for nine...
*August 31, 2011*

**Algebra**

Could someone verify if I got two answers to two problems right? f(x)=x^2-9x+15 find x and y intercepts -9+square root of 21/2,0 -9-square root of 21/2,0 x^2-x+3=0 solve and find x-intercepts (1+square root of -11/2,0) (-1-square root of -11/2,0)
*August 31, 2011*

**PSYCHOLOGY**

You are very welcome.
*August 30, 2011*

**Algebra**

Thank you for your help. I understand a whole lot more.
*August 29, 2011*

**Algebra**

Posted by Aria on Monday, August 29, 2011 at 2:58pm. This is a concept check on quadratic equation application. I am having trouble with a couple of parts. If anyone can help I would appreciate it. Suppose you are an event coordinator for a large performance theater. You need ...
*August 29, 2011*

**algebra**

With the fractions all you need to do is divide the numerator by the denominator. You will see which number is greater. Remember that negative numbers are the same as positive numbers in that they get greater as they move away from 0, only from right to left instead of left to...
*August 29, 2011*

**Algebra**

Thanks a bunch. I appreciate the detail. quadratic equations are confusing for me to graph. I no sooner think I have it than I get an answer wrong.
*August 29, 2011*

**Algebra**

This is a concept check on quadratic equation application. I am having trouble with a couple of parts. If anyone can help I would appreciate it. Suppose you are an event coordinator for a large performance theater. You need to supply information about projected ticket sales to...
*August 29, 2011*

**algebra**

Remember when using the distributive law to factor you are in fact using factoring backwards. Write each of your terms with the common multiplyer. Do you see the connection between all the numbers? What number in the equation is the base for the rest. 3,right? So write each ...
*August 29, 2011*

**Spanish**

The pronunciation is cam-bee-AYS. The answer to the second question is yes.
*August 6, 2011*

**algebra**

Thank you. I don't what to talk in class like I haven't done my homework. I did, but the two answers confused me. The second looked plausible, but I trust a university mathlab a whole lot more.
*August 5, 2011*

**algebra**

I have a question about exponents of rational expressions. I have two answers for one problem. One was written on a university mathlab and the other from a calculator. (3a^3/2)*(-7a^1/5) = -21a^17/10 (3a^3/2)*(-7a^1/5) = -21^a4/10 Can you tell me which is right? The first one ...
*August 5, 2011*

**Science**

I would suggest going online and look for articles on ion conduction experiments. Just Google ion conduction experiment scholarly articles and see what comes up.
*August 5, 2011*

**University of Phoenix**

Are you a student at the university? Have you checked the library? You can ask a librarian. Also you can go online and get financial statistics from large companies. You could also check scholarly articles on Dell finances. Finance magazines can help with that. You can usually...
*August 5, 2011*

**English**

Lizzie You have a sound and interesting speech. I would say your conclusion just needs to be an extension of your key statement in your introduction. You can make an encapsulated form of key points of your speech. Then punching in a thought provoking question at the end would ...
*August 3, 2011*

**Ag econ**

Thomas I would suggest Googeling "Precision Agriculture in the 21st century" then modify your search to include "proving marginal profitibilty. You will get good research papers from universities and agricultural organization world-wide that share detailed ...
*August 3, 2011*

**science**

Stacey, This is a basic mathmatics problem but sounds more difficult. Draw a picture of the trail from start to finish and add and subtract on the way. What is your total distance if you travel 100m and then travel 35m more? Then, if you have traveled 100m and traveled back 35...
*August 3, 2011*

**Algebra**

I am stumped by these two LCM questions for some reason. Find The LCM for #1 2(R-7) and 14(R-7) #2 (1+4r), (1-16r^2), and (1-4r) It seems like #1 is already at the LCM and #2 would be (1+4r)(1-4r) Am I even vaguely correct? Thanks for your help.
*August 2, 2011*

**algebra**

Start with the given equation of I=700w/h^2 I=700w/72^2 Plug in Jerome's height I=700w/5184 Since we want the BMI to be between 24 and 33, we have to construct an inequality. 24=<700/5184=<33 Multiply all sides by 5184 5184*24=<700w*5184/5184=<33*5184 Once you ...
*August 1, 2011*

**Algebra**

I am having trouble with two problems. I can't seem to get a solid solution to either one of them. 3/y+5 + 6/7y add and simplify 5-r/8-r = 3/r-8 solve Can someone help me please? Thanks so much.
*August 1, 2011*

**Algebra**

Damon, Why does this explain the highest yeild? It sounds like what you did was on a graph and you found the highest points
*July 20, 2011*

**Algebra**

If the profit equation for the monthly sales of tile sets is P = -x^2 + 56x - 300, how do I find the number of tiles that yeilds the most profit. x=number of tile sets. The amount of money for costs each month is set at $300. I saw an answer as 28 tile sets would yeild the ...
*July 20, 2011*