Monday

November 24, 2014

November 24, 2014

Number of results: 18,210

**Statistics**

In an analysis of variance, if the null hypothesis is true then: - The research hypothesis is also true -You will need fewer participants for the experiment - There is less variance among the sample means than if the null hypothesis was not true - The within-group estimate of ...
*October 11, 2009 by Trey*

**Chemistry**

I have a statement that I have to answer either always true, sometimes true, or never true: A decigram is 100 times smaller than a gram. In my book it says deci - 10 times smaller than the unit it precedes. So that would mean decigram is always only 10 times smaller, right? ...
*September 25, 2008 by Mike*

**physics**

Determine for each of the following statements whether it is always true or can be false. In a perfectly inelastic collision, the kinetic energy is conserved. Kinetic energy is conserved in an elastic collision. Two objects of different masses but moving at the same velocity ...
*March 2, 2012 by Katie*

**physics**

please check: Conductors can be charged by ___, while insulators cannot. a. grounding b. induction c. polarization d. contact D Which of the following is not true for both gravitational and electric forces? a. the inverse square distance law applies b. forces are proportional ...
*March 14, 2009 by physics*

**math**

In the square if part A is 1/4 of the square and part C is 1/10 of the square, what percent of the square is part B?
*March 9, 2011 by jordan*

**math**

I am the smallest 2 digit odd number whose digits add to 2. i look the same backward and forward and so does my square product. my square product is a 3 digit number. what number am i and what is my square product?
*September 24, 2012 by hailey*

**Calculus, Surface Area Pt.2**

The base costs 0.9 cents/square cm, the front costs 0.8 cents/square cm and the sides and back cost 1.3 cents/square cm. The cost of the material to make the box is : Cost = ?
*February 17, 2014 by Anonymous *

**Calculus, Surface Area Pt.2**

The base costs 0.9 cents/square cm, the front costs 0.8 cents/square cm and the sides and back cost 1.3 cents/square cm. The cost of the material to make the box is : Cost = ?
*February 17, 2014 by Anonymous *

**Geometry**

The perimeter of a Triangle(MNO) is equal to the perimeter of square ABCD. If the sides of the triangle are represented by 4x+4, 5x-3, and 17, and one side of the square is represented by 3x, find the length of a side of the square.
*January 6, 2013 by LP*

**Algebra**

If the sides of a square lengthened by 7cm,the area becomes 196cmsquare. What is the length of the orinal side of the original square?
*May 13, 2008 by Jack*

**Geometry **

The sides of a square each measures 4 ¾ inches. Find the area of the square as a fraction or mix number. (Do not use decimals)
*September 10, 2009 by Rob*

**physics**

Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? 1 V
*September 29, 2010 by melody*

**algebra**

If the sides of a square are lengthend by 7cm, the area becomes 121cm^2. Find the length of a side of the orginal square.
*October 23, 2010 by Shane*

**Math**

If the sides of a square are lengthened by 7cm, the area becomes 121cm2. Find the length of a side of the original square.
*October 31, 2010 by Justin*

**maths**

The greatest area of the following (a) The radius of circle is 4 (b) The square of diagonal is 4 (c) The square of side is 4 explan option c sir
*October 21, 2011 by santosh*

**calculus**

let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes
*November 3, 2011 by laura*

**math**

How much cans of paint is needed to cover an area of 36 metres square if one can covers 25meters square.
*January 16, 2013 by Anonymous*

**statistics**

help me work out the problem to calculate the difference means distribution parameters n(1)=25, n(2)=36 s(1)square=50, s(2) square=72, M(1)=100,M(2)=105
*January 18, 2013 by Cherelle*

**Geography**

[THESE QUESTIONS ARE NOT THE SAME AS MY PREVIOUS POST) I am working on my take home quiz questions now...and i am not sure about the answers of the folowing questions...can anyone please help me to check???? THANKS A LOT!!!! (The "*" represents the answer I chose) The primary ...
*July 7, 2010 by Monique*

**groundwater science**

Assume that a losing stream exists in physical connection with groundwater in an isotropic unconfined aquifer. Assume that several contour lines of equal head cross the stream and intercept it. These contour lines of equal head are "V-shaped", with the point of the "V" facing ...
*February 19, 2011 by dan*

**math**

a^2 + 4a + 4 = (a+2)^2, so it is a square I dont understand why is this square, please help
*December 13, 2008 by Karria*

**math**

square of 3+1 divided by square of 2 how to find the answer
*June 4, 2009 by priya*

**math**

how many square centimeters make a square meter
*September 2, 2009 by alyssa*

**math**

how many square millimeters equal 1 square meter
*September 2, 2009 by alyssa*

**math**

the diagonal of a square is 32 meters. What is the area of the square?
*September 15, 2010 by Cassie*

**math**

how many square decimeters make 1 square meter?
*September 20, 2010 by Bradyn*

**Math **

1. (square rt. 5) +(square rt. 25) = 2. If y=x^2 +2x +k passes through the point (1,2), then k = 3. If F(x) = 1 +3x^2, where X cannot be 0, then F(x+2)-F(2)/(x) =
*January 23, 2011 by Anonymous*

**radical expression**

5 (x) square of 8t (x)square 32t to the 5 power
*March 3, 2011 by Anonymous*

**geometry**

A square has side lengths of 4x - 3 and 2x - 5. What is the area of the square?
*October 15, 2011 by ezekiel jones*

**Math**

a square in a circle with a radius of 2 pi .What is the perimeter of the square?
*July 31, 2012 by Grace*

**Geometry**

A square has side lengths of 3n and n + 18. What is the area of the square?
*September 17, 2013 by Anonymous*

**Math**

The endpoints of a diagonal of a square are (-2,2) and (1,5). What is the area of the square?
*July 30, 2014 by Anonymous*

**Math**

Which of the following is Not true about a square? A.It has 4 right angles B.It has 4 congruent sides C.It has 4 acute sides D.Opposite sides are parallel C? The table shows the height of 3 different mountains Everest=8850 Tacora=5988 Baruntse=7129 Which is the best estimate ...
*February 9, 2012 by Colton *

**math- check**

please check: this deals with a rectangular prism: RECTANGULAR PRISM HAS (6 FACES) 4 FACES ARE FORMED BY RECTANGLES 2 FACES ARE FORMED BY SQUARES A RECTANGULAR PRISM HAS 12 EDGES A RECTANGULAR PRISM HAS 8 VERTICES t FOR TRUE, f FOR FALSE T : IT HAS NO CURVED SURFACES T: ALL OF...
*May 21, 2012 by Celest*

**math**

Could someone please tell me if I am on track with my answer? Jack is taking a four-item true-false test. He has no knowledge about the subject of the test and decides to flip a coin to answer the items. What is the probability that he receives a perfect score? What is the ...
*November 18, 2009 by Punkie*

**us history**

When Hawaiians announce their intention to end foreign influence on the islands, Ameerican business helped to start a revolution in 1893 to topple the government. ----------------------False? My us history book only talks about foreign influence when american involved in china...
*April 8, 2008 by CM*

**Math Help Please!!!!**

The breaking strengths (say, y) for one foot square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2280 pounds per square inch and a standard deviation of 10.6 psi. a) find the probability of selecting a 1 foot square sample of ...
*February 23, 2013 by Taylor*

**Biology**

A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong. Are the following true or false and support your answer: i. Red blood cells and nerve cells in adult humans are suitable for karyotyping (...
*September 19, 2011 by Ashley*

**Geometry **

3. A box company produces two sizes of pizza boxes. The smaller box has a surface area of 260 square inches. The larger box has a length, width, and height that are twice those of the smaller box. What is the surface area of the larger box? A. 520 square inches B. 1,040 square...
*May 25, 2011 by Mary *

**Health/ Basic Clinical Procedures**

please check my answer thank you True or Faise I said True Cilia prevent the entrance of pathogens into the body by providing an acidic envioroment
*April 19, 2008 by Helana*

**Physics**

I know how to do displacement, I just get confused by the directions. I walk 6 blocks east and 5 blocks north-I come up with 7.8 because I squared 6 + squared 5 and took the square root of 61 but do I say the final displacement is 7.8 blocks east of north or 7.8 blocks north ...
*January 5, 2011 by Tina*

**Math**

1. Find the exact value of 2tan pi/12 / 1-tan^2 pi/12 root 3/3? 2. Given tanθ = -1/3 and with θ in quadrant IV, find the exact value of cos2(θ) 4/5 3. Exact value of cos^2 67.5 - sin^2 67.5 root3 /2 4. The expression cos 3θ can be rewritten as 1 - 4cosθ...
*June 3, 2013 by mysterychicken*

**trig question**

On a unit circle, sin x = square root 3 over 2, with center O. Vertical line from top to center of circle is PO. Horizontal line from middle to right of circle is OE. Another vertical line of AB is parallel to PO. And radius of circle (line from O to A) is 1 unit. From A to E ...
*April 28, 2012 by Anonymous*

**Math**

Historically, an acre was the amount of land that an ox could plow in one day, which was deemed to be 4,840 square yards. Supposing that an ox could plow 4,840 square yards in a day, how manyyears would it take an ox to plow a square mile?
*March 26, 2014 by WALTER*

**calculus**

use differentials to determine by approximately how many centimeters does the diagonal of a square table increase if its area is increased from 50 square centimeters to 54.45 square centimeters? Area= s^2 Diagonal= sqrt(2s^2) so, D= sqrt(2A) dD=A^(-1/2) dA dD= 50^(-1/2)* 4.45 ...
*October 18, 2014 by anonymous*

**Quantum Physics**

We will carry out some steps of the quantum factoring algorithm for N=91 (a) What is the period k of the periodic superposition set up by the quantum factoring algorithm if it chooses x=8? I.e. what is the period of f(j)=8j(mod91) (b) Using your answer to (a), find a ...
*October 12, 2013 by ss01*

**French**

could you please check these thanks. Directions: Indicate whether each of the following statements are true or false. 1. Avant de monter en avion, on passer par le controle de sécurité. Answer: Vrai 2. On sert un repas pendant un vol transatlantique. Answer: Faux 3. On ramasse...
*August 30, 2009 by Lauren*

**maths, please help!**

I need help solving this: 6x^2-x-12=0 I usually could do this yet i have completely forgotten what i need to do seeing as there is a number infront of the x^2 This equation is of the general form a x^2 + bx + c = 0 The solution is always x = [-b +/- sqrt (b^2 - 4ac)]/(2a) = [1...
*February 22, 2007 by elle*

**JAVASCRIPT**

Start button won't work for a scolling marquee. Below is the javascript code. window.onload = defineMarquee; var timeID; var marqueeTxt = new Array; var marqueeOff = true; function defineMarquee() { var topValue = 0; var allElems = document.getElementsByTagName("*"); for (var ...
*April 21, 2011 by Kevin*

**Math**

A box company produces two sizes of pizza boxes. The smaller box has a surface area of 260 square inches. The larger box has a length, width, and height that are twice those of the smaller box. What is the surface area of the larger box? Choices are: A. 520 square inches B. 1,...
*May 25, 2011 by Mary - Help plz *

**Chemistry**

How would the dx2−y2 orbital in the n=5 shell compare to the dx2−y2 orbital in the n=3 subshell? True or False 1.The contour of the orbital would extend further out along the x and y axes. 2. The value of ℓ would increase by 2. 3.The radial probability ...
*April 24, 2014 by Kristine*

**math**

solve the equation x^3-5x^2-4x+20=0 I need a hint on how to solve this Look for the first root by graphical means or trial-and-error. Note that when x=2, x^3-5x^2-4x+20 = 8-20 -8 +20 = 0. Therefore 2 is one root and x-2 is a factor. Next, divide x-2 into x^3-5x^2-4x+20 using ...
*July 8, 2007 by jason*

**calculus**

use differentials to determine by approximately how many square centimeters does the area of a square table increase if its diagonal is increased from 4 centimeters to 4.092 centimeters the question is The area of table increases by approximately (??) square centimetres
*October 11, 2014 by denial *

**Algebra 1**

If the sides of a square are lengthened by 8cm, the area becomes 289cm^2. Find the length of a side of the original square. I do not know how to do this please help me.
*July 3, 2008 by Cynthia*

**Math-14**

Find three consecutive integers such that the square of the sum of the smaller two is 144 more than the square of the largest.
*April 4, 2009 by purpletree*

**Physics**

Four equal charges Q=2*10^-8coulumb are placed at the corners of a square of side 60cm.calculate the potential at the centre of the square.
*April 8, 2010 by Ayodele*

**College Algebra**

If the sides of a square are lenthened by 7 cm, the area becomes 222 cm squared. Find the length of a side of the original square.
*August 12, 2010 by Jacqueline*

**Math**

Suppose that the area of a square is forty-one times its perimeter. Find the length of a side of the square. All I can think of is that P=4s and A=s^2 thanks for any help
*September 10, 2010 by Mark G*

**algebra**

Three points of a 5x5 square array are connected. How many square units are in the area of the largest possible triangle that can be formed?
*March 20, 2011 by jason*

**Calculus**

The base of a solid is the region bounded by the parabola y^2=4x and the line x=2. Each plane section is perpendicular to the x-axis is a square. What id the volume of the square?
*April 3, 2011 by Amanda*

**algebra**

Please help: If the sides of a square are lingthened by 7cm, the area becomes 169cm^2. Fine thelength of a side of the orginal square.
*November 10, 2011 by jane*

**wchs**

A checkerboard measures 144 square inches. What is the length of a small square on its side? Hint: It has 8 squares per edge.
*January 30, 2012 by Clara*

**Physics**

Charges of +2.38 nC and -1.06 nC are located at opposite corners, A and C, respectively, of a square which is L = 1.13 m on a side. What is the electric potential at a third corner, B, of the square (where there is no charge)?
*February 2, 2012 by Ashley *

**physical science**

how many square feet are there in an area of 1.00 square meters( 1 ft.=0.305)? use the proper number of significant figures in the answer.
*September 2, 2012 by tracey*

**Alg 1**

Completing the square: Find the value of c such that each expression is a perfect-square trinomial. p^2 - 11p + c Is the answer 30.25? If not, please explain. Thanks
*April 13, 2013 by Jane*

**History**

What does it mean to be a true idealist? In my book it said Roosevelt considered himself to be a true idealist, not President Wilson.
*November 13, 2011 by Anonymous*

**Math**

If one side of a square is increased by 2 inches and an adjacent side is decreased by 2 inches, the area of the resulting rectangle is 32 square inches. Find the length of one side of the square.
*December 19, 2012 by LP*

**math**

i have trouble finding the answer to this and how to srt. there is a square and i havbe to find the area. HOweever inside the square is a triangle. the base of the triangle is 3 and the leg is 7. no height is given. plz help. Is this a right triangle? Is the base or leg equal ...
*July 14, 2007 by liz*

**Geography **

True or false ? - Australia's most important rivers the Murray and the darling flow across a vast plain that contains fertile farmland - New Zealand is made up of one major island with highlands,forests,lakes,and rugged mountains . -new Zealand's climate is hotter than ...
*April 10, 2014 by Anabelle*

**Vision Math**

Explain to me how this is true: Six people are given 1/10 of a veggie pizza and 2/5 of the pizza is left how is that true?
*November 28, 2011 by Kassidy Cook*

**physics- multiple choice**

1. The normal force is always less than or equal to force of gravity a) True b) False 2. What is the value of the normal force? (there is an image of a box with a mass of 10kg and it is sitting on a flat horizontal surface) a) 98 N [up] b) 98 N [down] c) 10 N [up] d) 10 N [...
*December 16, 2013 by Jessie*

**Physics multiple choice**

1. The normal force is always less than or equal to force of gravity a) True b) False 2. What is the value of the normal force? (there is an image of a box with a mass of 10kg and it is sitting on a flat horizontal surface) a) 98 N [up] b) 98 N [down] c) 10 N [up] d) 10 N [...
*December 17, 2013 by Jessie*

**Physics**

So for each of the statements we have to write true or rewrite the part in Caps to make the sentence true. I'm only stuck on a couple. 1. On a position-time graph, the average velocity equals the run MULTIPLIED by the rise. 2. A child drops a ball. The instantaneous velocity ...
*February 3, 2011 by Leanna*

**Math-Algebra**

1. The area of a square varies directly as the square of its side. If the side is halved, what would be the effect on its area? 2. If y varies directly as the square of x, what will happen to y when x is tripled?
*November 13, 2013 by McKenna Louise*

**algerba**

How to figure out the temperature of a lake using x for the feet or the Depth and for the degrees Celsius, use (3900x+1000) /(3x^2+100) with the answer of the degrees Celsius being 6.74 looking like 6.74=(3900x+1000)/(3x^2+100) i need the depth i have figure out that a=-20.22 ...
*May 18, 2014 by beckylynn*

**Science 1**

At apparent magnitude -3, Jupiter is 100X brighter than second magnitude Polaris. True False Read. http://en.wikipedia.org/wiki/Apparent_magnitude hint: - signs mean brighter but the rule of times 2 still holds If leaving a rference like I did helps you, pleas leave a thankyou...
*November 21, 2006 by Liz*

**inermediate algebra**

A box with no top is to be made by cutting a 2-inch square from each corner of a square sheet of metal. After bending up the sides, the volume of the box is to be 220 cubic inches. Find The the length of a side of the square sheet of the metal that should be used in the ...
*November 24, 2012 by tino*

**Chemistry......**

If the statement is true, write a T in the blank. If the statement is false, rewrite it to make it correct. 1. An inert gas reacts easily with other elements 2. Radioactive decay is dependent on external forces such as temperature and pressure Fill-in-the-blanks An (11...
*September 8, 2013 by Anonymous*

**Chem**

If the statement is true, write a T in the blank. If the statement is false, rewrite it to make it correct. 1. An inert gas reacts easily with other elements 2. Radioactive decay is dependent on external forces such as temperature and pressure Fill-in-the-blanks An (11...
*September 8, 2013 by Anonymous*

**physics please**

there are nearly (pi) x (10^7) seconds in one year. find the percentage error in this approximation, where percentage error is defined as abs value[ (assumed value - true value)/ true value] x 100% to find the true value I did: (365 days/yr) x (24 hours/1 day) x (60 minutes/...
*January 22, 2010 by sam*

**Physics **

A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. N is the normal component of the contact force. All quantities below are magnitudes. Answers are either true or false. 1)The total force on...
*June 18, 2013 by Cori Smith*

**5th grade Math**

Insert parentheses to make this sentence true. 3*8+6 squared -8/2=26. My teacher told me I think that the parentheses go around the 3 and last 8. Is that true. How did you do that?
*October 2, 2008 by Serena*

**Biology**

Is it true that some organisms can only survive in a small range of pH levels. It the pH levels are too high or too low, the organism will die. Is that true??
*August 4, 2010 by Anonymous*

**Math**

Remove one value from the following data to make each statement true. 32,45,82,99,15,102,75,15,15,75,2,75 a)The mean is 56.09 How do you know the removed value makes it true?
*June 20, 2014 by Sara*

**Algebra-One to one function**

Could you please check my answers and help me with one of them? Find the inverse of the one to one function 1. f(x)-4x+7 -I got f^-1(x)=x-7/(-4) 2. f(x)= square root of x-8 -I got f^-1(x)=x^2-8 3. f(x)=4/(5x-1) This one I dont understand how to find the inverse of the one to ...
*September 13, 2007 by Soly*

**Stats**

I am working on a review sheet and got everything except for this one. I am not sure whether to use z or t. The number of hours per week that high school juniors watch TV is normally distributed with a mean of 8 hours and a standard deviation of 2 hours. If 100 students are ...
*May 21, 2014 by Joe*

**physics**

A circle with a radius of R is inscribed in a square. On the corner of the square are point charges of +q, +q, -q, and +q. On the circle are charges of +2q, +2q, -q, and +q. (See sketch.) If q = 4.8 micro-coulombs, and the total potential at the center of the circle due to all...
*February 10, 2012 by Mandaleigh*

**College Physics**

Which one of the following statements about a thermodynamic engine is not true, i.e., which one of the statements is false? 1)The internal energy is always the same at the beginning and at the end of one cycle. 2)The absorbed and the exhausted heat have the same magnitude. 3)...
*November 22, 2010 by Tracy*

**calculus**

A multistoried building has a floor area of 2,000 square feet on the ground floor, 1,995 square feet on the 1st floor, 1,990 square feet on the 2nd floor, and so on. If the areas of the higher floors follow this sequence, what is the expression to calculate the area of the nth...
*November 27, 2012 by Chelsy*

**Sameul**

by completing the square method solve the equation. x^2-2x-1 can u factor it? when i did it it couldn't be factored. i also dont know why it is not factorable because its a perfect square right? please help me
*October 31, 2009 by Math 10*

**math 10**

by completing the square method solve the equation. x^2-2x-1 can u factor it? when i did it it couldn't be factored. i also dont know why it is not factorable because its a perfect square right? please help me
*October 31, 2009 by shajevan*

**Geometry**

One square has twice the area of another square. Explain why it is impossible for both squares to have side lengths that are whole numbers.
*January 1, 2012 by Anonymous*

**Physics electromagnetism**

four equal point charges are at the corners of a square. where besides infinity and at the center of the square is the strengh field zero?
*February 21, 2012 by Antonio*

**math sixth grade**

The square chessboard has an area of 196 square inches what is the length on inchesof one side of the chess board
*May 24, 2012 by anisha*

**geometry**

how can you determine the probability that a point radomly selected from the interior of a square surrounded by two semi circles will fall within the square
*July 29, 2012 by roman*

**statistics**

Needing some help to clarify this problem and help finding the right answer. _b___ 2. Which of the following accurately describes the critical region? a. outcomes with a very low probability if the null hypothesis is true b. outcomes with a high probability if the null ...
*December 29, 2013 by Lyn*

**chemistry**

Is it true that a p electron cannot have a magnetic quantum number equal to -2? Is it also true that for the hyfrogen atom, a 3d orbital is of higher energy then a 4s orbital?
*September 21, 2008 by Erika*

**math**

Suppose p(x) is a twice-differentiable function such that p(1) = 3, p'(1) = 0, and p”(1) = -2. Which of the following is true? there is a relative maximum at p(1) = 3 there is a relative minimum at p(1) = 3 there is a point of inflection at p(1) = 3 none of these are true
*March 11, 2014 by lilly*

**math**

Tomas needs to cut a piece of wood for a model airplane he is building. He has four pieces of wood: 5 feet, 4 feet, 6 feet, and 3 feet long. If the length of wood he needs to cut is 11 square root feet long, which piece of wood should he cut to have the least amount of unused ...
*December 12, 2012 by Anonymous*

**math**

a square sheet of tin 30cm on a side is to be used to make an open - top box by cutting a small square of tin from each corner and bending up the sides. how large should be the square cut from each corner to make the box's volume as large as possible
*May 12, 2013 by irma*

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