Friday

July 31, 2015

July 31, 2015

Number of results: 19,753

**epidemiology**

A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is implemented. (Assume the ...
*November 16, 2014 by anonymous*

**Math - gr.11**

Hi, can someone help me figure out how to do this question? A 5m stepladder propped against a classroom wall forms an angel of 30 degrees with the wall. Exactly how far is the top of the ladder from the floor? Express your answer in radical form. This chapter right now that we...
*November 20, 2008 by Kim*

**Math**

Under what circumstances is fog = gof always true? When is this statement true for f(x) = x2 + x – 2 and g(x) = x + 4? (4 marks)
*January 20, 2013 by Anonymous*

**Math**

Determine whether, for any set A, it is true that P(A) = P(U) − P(A). If it is true prove it, if it is not, give a counterexample.
*April 22, 2015 by Anonymous*

**Chemistry**

A mole of a pure substance contains 6.02x10^23 atoms. Alway true, sometime true or never true? -I was thinking sometime true since a pure substance can be like H2O but H2O have 3 "atoms" (Is this what you call individual part of H2O?). Each "atoms" have 6.02E23 so it wouldn't ...
*February 5, 2013 by Shadow*

**Computer science**

1.Fraction that has a numerator and a denominator. The class should have methods that can: (a) add and subtract two Fractions together and return the resulting Fraction, (b) create a duplicate of itself and return the duplicate, (c) see if another Fraction is equivalent to ...
*May 28, 2010 by Sarah N*

**English**

true and false question are called Rejective Objective Dejective Subjective I think it's dejective Objective exams , subjective test contain More question Harder question Fewer question No good answer I think it's more question
*May 19, 2015 by Linda*

**Math**

Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and describe what coping ...
*March 3, 2007 by Lisa*

**Science**

True or False Louisiana's delta region accumulates sediment slower than it is subsiding. Most urban sewer systems in the United States were built in the late 1900's Sediment cores measured for containment levels have the highest levels of PCB's from the early 1960's. I have ...
*May 14, 2007 by Suzi*

**Statistics**

A statistician analyzing a randomized controlled experiment has tested Null: The treatment does nothing. Alternative: The treatment does something. using a 4% cutoff for P-values. The P-value of the test turns out to be about 1.8%. 1. The conclusion of the test is -The ...
*August 24, 2013 by stat*

**science**

A statistician analyzing a randomized controlled experiment has tested Null: The treatment does nothing. Alternative: The treatment does something. using a 4% cutoff for P-values. The P-value of the test turns out to be about 1.8%. 1. The conclusion of the test is -The ...
*August 24, 2013 by stat*

**science**

A statistician analyzing a randomized controlled experiment has tested Null: The treatment does nothing. Alternative: The treatment does something. using a 4% cutoff for P-values. The P-value of the test turns out to be about 1.8%. 1. The conclusion of the test is -The ...
*August 24, 2013 by stat*

**chemistry**

It takes 19.6 mins for a 10.0mL sample of an unknown gas to effuse through a pinhole. A 10.0mL sample of He, required 5.05mins. What is the molar mass of the unknown gas? I got that you have to do : effuse rate of He/Effuse rate of Mx = Square root of (Mx/MHe) but then im ...
*February 24, 2014 by jin*

**algebra**

the formula d=(square root)12,800+h^2 gives the distance d in kilometers to the horizon from a satellite h kilometers above Earth.Find the distance to the horizon to the horizon from a satellite 4200 km above Earth. Round to the nearest kilometer. PLEASE HELP ME
*December 6, 2012 by alexis*

**Grammar**

1.“Follow-up” or “followup” can be a noun or an adjective. A) True B) False I answered A 2. Select the 2 correctly punctuated sentences: A) His followup appointment is in 2 weeks. B) His follow up appointment is in 2 weeks. C) His follow-up appointment is in 2 weeks. I answered B
*November 28, 2012 by Marie*

**Can anyone help me with a physics question?**

A water tank has a volume of 100m^3. A square pipe leading to a pump is designed to completely replace all water in 20 minutes. Caluclate the length of a side of the square if the water is travelling at 5.0m/s through the square pipe.
*March 16, 2010 by Rob*

**math**

Tina wants to buy flannel sheets. She reads that a weight of at least 190 grams per square meter is considered high quality. She finds 3 options for flannel sheets: 1)1,100g of flannel in 6 square meters, $45. 2)1,260g of flannel in 6.6 square meters, $42. 3)1,300g of flannel ...
*January 27, 2015 by kymy*

**math**

write two consecutive perfect square closest to 20. estimate the value of square 20 . square your estimate. use this value to revise your estimate. keep revising your estimating until the square of the estimate is within 1 decimal place of 20. my eng is limited, can anyone ...
*February 4, 2015 by miki*

**Probabilities**

Can someone help me work this out. Find the a) mean, b)variance and c) standard deviation for the probability distribution below K Pr(X=k) 0 0.4 1 0.2 2 0.3 3 0.1 For mean I came up with 1.1 0(0.4)+1(0.2)+2(0.3)+3(0.1) For variance I came up with 1.09 0.4(0-1.1)sq+0.2(1-1.1)sq...
*July 9, 2015 by Debra*

**algebra**

Can someone please help me with these problems? Write (27a^-3)^-2/3 in simplest form. Solve log(6x+11)=2. thanks Let me see your work, we can start from there. Alright! :D (27a^-3)^-2/3 =the cubed root of (27a^-3)^-2 =the cubed root of 27^-2a^6 i figured out how to do the ...
*June 2, 2007 by Lillian*

**Math**

Choose any number for p. Determine whether the following equation is true. (2p-3)(p+4)=2p^2-5p-12 I don't think this is true. Am I correct?
*November 18, 2014 by Cherie*

**Math**

identify the conditions on x that make the following statement true, if they can be made true at all: 9^x > 1 9^x < 1 9^x = 1 9^x = 0 9^x < 0 what is the question asking for?
*February 8, 2015 by Dan*

**Physics**

bob drop a rock from a height of 4.5 m. (the acceleration due to gravity is 9.8 m/s^2) 1.at s the initial speed of the rock 2. how long is the rock falling before it hits the ground c. what is the final speed of the rock? [I have trouble with c) My work: a) v1 =0m/s b) v1t +1/...
*December 1, 2014 by Ash*

**history**

the Puritan dilemma can someone help me check my answers the answers with an (*) at the end them are the ones i think are right 1. Englishmen rejoiced when Henry VIII turned his back on the Pope because now they felt they would be free to join the Protestant Reformation and ...
*May 1, 2012 by eric *

**history**

the Puritan dilemma can someone help me check my answers the answers with an (*) at the end them are the ones i think are right 1. Englishmen rejoiced when Henry VIII turned his back on the Pope because now they felt they would be free to join the Protestant Reformation and ...
*May 2, 2012 by eric *

**math**

is the statement |f(x)|= f|(|x)| always true, sometimes true or never true use examples. If f(x) means the function of x then it means the absolute value of the function of x equals the function of the absolute value of x. I do not know how to provide examples but I believe ...
*June 9, 2015 by george *

**Algebra 1**

A square purple rug has a blue square in the center. The side length of the blue square is x inches and the purple region is 8 in. What is the area of the purple part.
*April 13, 2015 by Larry*

**Maths**

how would you write the following expressions using numbers, parentheses and other mathematical symbols. 1. Double the sum of twenty-five and eight. 2. The quotient of fifteen and three subtracted from the product of four and nine. 3.The difference between twenty and five ...
*August 2, 2011 by Anonymous*

**Calculus II**

Fed loves polynomials with rational coefficients and only such polynomials.Suppose f(x)=square root of x. Find a polynomial P(x) that Fred will adore so that, for any x in the interval [3,5], the difference between P(x) and f(x) is less than .01 Hint: The interval is [3,5]. ...
*October 17, 2012 by Lauren*

**Calculus Help and Check**

1)Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative. Remember to use ln |u| where appropriate.) f(x) = (1/5)−(3/x) -----> (x/5)-3lnx+C 2)Find f. f ''(x) = 4 + 6x + 36x^2, f(0...
*April 18, 2014 by Kimberly :(*

**physics**

The average speed of a nitrogen molecule in air is proportional to the square root of the temperature in kelvins. If the average speed is 475 m/s on a warm summer day (temperature = 300.0 kelvins), what is the average speed on a cold winter day (250.0 kelvins)?
*September 5, 2007 by amy*

**math**

A scale model of a rectangular building lot measures 7 feet by 5 feet. If the actual house will be built using a scale factor of 12, what is the area of the actual building lot? 35 square feet 420 square feet 840 square feet 5,040 square feet
*July 17, 2015 by DeMarcus Smith*

**SS**

What do colonialism and imperialism both require? a) one country giving money to another b) two countries sharing c) two countries working together d) one country ruling another country D What is one negative effect of the huge oil reserves in Nigeria? a) deforestation b) ...
*October 4, 2013 by Anonymous*

**Math**

Can someone please double check my answers (My answers are in Capital) 1. If you produce a million products a day and you want to test ten of them to determine if they are up to standard, which ones will you choose? a. The second ten B. TEN RANDOM UNITS c. The last ten d. The ...
*June 18, 2013 by mysterychicken*

**Algebra**

I think that the goal is to get rid of the 5th root in this case. I know that I have to make whatever is under or in the root -in this case the number is X equal some number to the fifth power. I am supposed to use the rule a^(m/n)= n (the n-root) (don't know how to type it) ...
*July 24, 2007 by Tammy*

**2nd grade math**

If you have a rectangle with 24 square units 3 lines down 8 across how can you have a 4 unit rectangle with a perimeter of 8 around the outside also 6 units with a perimeter of 10 in a seprate problem A square of 4, perimeter of 8. What about a 2x2 square? A rectangle of 3x2 ...
*May 21, 2007 by Gloria*

**Algebra**

Rationalize the denominator. Assume that all variables are positive. 5x^4y/2x^2y^3 There are square root signs around both parts of the fraction, but I cannot make them on the computer. Thanks in advance. are u using the carrot symbols to mean to the power of...? Yes Come on, ...
*February 24, 2007 by Natalie*

**physics**

Consider a square of side length a = 9.4 cm with charged particles at each of the corners.Three of the particles carry +9 nC of charge while the fourth particle carries -9 nC.In volts, what is the electric potential at the center of the square? Hint: Choose the potential to be...
*February 24, 2011 by Crystal*

**MAths**

A unit square is drawn in the Cartesian plane with vertices at (0,0),(0,1),(1,0),(1,1). Two points P,Q are chosen uniformly at random, P from the boundary of the square and Q from the interior of the square. The line L1 through P and Q is drawn. The probability that the points...
*April 29, 2013 by ianian*

**a**

Victoria wants to plant a vegetable garden in the shape of a square. She has a space allocated in her backyard that will accommodate 175 square feet. Using the drawing below, use the FOIL method to find the polynomial that represents the area of the square. If x=6, will she ...
*March 12, 2014 by WillyB*

**Please help **

True or Fulse Diaspra is the spread of ideas , customs , and technology from one people to another. I think its true ?
*March 2, 2012 by ciara*

**Chem**

The relationship between volume and pressure (at constant temperature) is directly proportional. my answer- True The relationship between pressure and temperature (at constant volume) is inversely proportional. my answer- True The relationship between volume and temperature (...
*October 17, 2010 by chris*

**Geometry**

find 1 counter example to show the each conjecture is false. that means prove the follwing statment false. The product of 2 positive numbers is greater than either number. ok so I know product means to multiply but if you multiply you get a bigger number . Please help...
*August 22, 2007 by tori*

**History**

We have to explain why greed is not the root concept of war as a social disease. Are whole goal is to find the one thing that is the main root of war It possibly could be fear. But in the mean time we have to do process of elimination on other concepts. I understand that greed...
*February 5, 2009 by Michele*

**Math**

Simplify: 4^(-1/2) 4-1/2 = 1/41/2 = 1/2. check my work. On exponents, negative means reciprocal. 4(-1/2) means the same as 1/4(1/2) which is the same as 1/squareroot(4) so the answer is 1^4 no, of course not. The square root of 4 is 2 isn't it? so 1/squareroot(4) = 1/2. oh lol...
*December 2, 2006 by Alex*

**Algebra1**

33. Simplify a^5/a^3 a^2? Because I think when it's like that you subtract the two powers. Simplify sqrt of a^2 How do you do this? 44. Solve 1/2 * [3/4 + 1/2] 1/2*5/4 5/8? 47. Solve 1/2*[3/4divided by 1/2] 3/4? 49. Solve sqrt of -100 a. sqrt of -100 b. -10 c. 10 d. No answer ...
*April 2, 2010 by mysterychicken*

**Math / Algebra**

Can you check my work? Thank you :) 1. The Domain of a function F is the same as the range of F^-1 (True or False?) Answer: True. 2. Does the function y = |x-2| have an inverse? Select the best answer. A. Yes, it passes the horizontal line test. B. No, it does not pass the ...
*January 27, 2015 by Allison*

**Chemistry (Check)**

Classify each of these statements as always true, sometimes true or never true. __NT___11. The SI base unit of mass is the milliliter. __AT___12. A decigram is 100 times smaller than a gram. ___ST__13. The SI unit of volume is derived from the unit of length. __NT___14. There ...
*January 18, 2007 by Bryan*

**calculus**

A 33 by 33 square piece of cardboard is to be made into a box by cutting out equal square corners from each side of the square. What size corners should be cut out so that the volume of the box is maximized?
*February 20, 2012 by james*

**8 th grade math**

each side of square is 6 in. long . a scale factor of 2/3 is used to draw a similar square. how long is each side of similar square . choices are 4in. ,6 in., 8in. ,answer not here i chose 8 in. is that right
*May 14, 2012 by Anonymous*

**math**

A Coast Guard ship patrols an area of 125 square miles. The area the ship patrols is a square. About how long is each side of the square? Round your answer to the nearest mile.
*August 26, 2014 by Timothy*

**Calculus**

A rectangular box is to have a square base and a volume of 20 ft3. If the material for the base costs 37˘/square foot, the material for the sides costs 10˘/square foot, and the material for the top costs 13˘/square foot, determine the dimensions of the box that can be ...
*June 17, 2013 by Anonymous*

**Math**

I am a perfect square that is 11 more than a perfect square and 13 less than a perfect square. whcih number am I?
*January 11, 2012 by Ziana*

**math**

2 times the cube root of radical 3. plus the cube root of radical 4.
*November 8, 2008 by amanda*

**math**

M and N are the midpoints of the sides of a square. What is the ratio of the area of triangle AMN to the area of the complete square? But the answer has to be in a ratio which is the area of a triangle to the area of the complete square. Also the triangle is in the square at ...
*May 19, 2012 by alandra*

**journalism check answers**

A kicker is the last sentence in a news article that leaves an impression with your reader. true or false false _______________ refers to opinion, travel, style, reviews and sports stories that are less reliant on breaking news or factual information. Soft news Current events ...
*March 26, 2015 by jimm*

**Math**

Can you help me? 360 in^ = _____ ft^ ( ^ means 2 ) So which would the answer be: 30, 3.6, 2.5, or 1.8 Wouldn't it be 30? (If I'm working this right)! Thank you!! Thank you A square foot = 12 inches by 12 inches = 144 square inches. What does dividing that into 360 square ...
*February 28, 2007 by Bobby*

**reading**

i need help my teacher give us adjective worksheet about spookley the square pumpking i need to write 6 adjective to describe spookley the square pumpkin. 1.little 2.square 3.kind 4.friendly 5.thankful 6.hopeful
*October 26, 2010 by 3 grade*

**calculus**

Help - I have three problems that I am stuck on - 1. Lim x approaches infinity (x-3/x squared + 4) 2. Lim x approaches 3 x cubed - x squared - 7 x +3/ x squared - 9 3. Lim x approaches negative infinity (x + square root x squared + 2x)
*October 27, 2008 by Jane*

**math**

A spherical ballon is being inflated at the rate of 35cc/min. the rate of increase in the surfece area(un cm˛/min.) of the ballon when its diameter is 14cm is: 1. 10 * under root 10 2. under root 10 3. 100 4. 10
*May 1, 2013 by aku*

**Maths**

Let f(x) = √(x^2 + 1) - 1 (taking the positive real square root, as usual). When x = 10^-3, compute f(x), working to 5 significant figures at every stage of the calculation. Show (algebraically) that f(x) =(x^2)/[√(x^2 + 1) +1]. Use this expression for f to compute...
*November 4, 2012 by Jade*

**physics**

How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...
*March 8, 2012 by Grace*

**calculus**

Each of the sides of a square (S) with an area of 16 is bisected and a smaller square (S2) is constructed using the bisected parts as vertices. The same process is carried out on S2 to construct an even smaller square (S3). What's the area of S3? (Draw a diagram, please?)
*June 5, 2012 by Ian*

**College Algebra--Still Confused **

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*February 5, 2013 by Krissy*

**math- quick help!**

The area of the smallest (shaded) square measures 1 square unit. What is the area of the largest square? (there are 7 squares) Please, please, please help me!!!
*November 14, 2011 by Audrey*

**math**

Perimeter of rectangle and a square are equal. Perimeter of the square is 96 cm and breadth of the rectangle is 4 cm less than the side of the square. Then two times the area of the rectangle is
*January 24, 2015 by ARUN*

**language arts**

1. The word centuries contains the Latin root cent-, meaning "hundred." Which of the following words contains the same root? center accent decent percent 2. The word mark is an Anglo-Saxon word meaning "boundary." Which of the following words does NOT contain this root? market...
*May 13, 2013 by Delilah*

**Statistics**

A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $100 of the true mean. The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required ...
*April 15, 2012 by Jason*

**epidemiology**

A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is implemented. (Assume the ...
*May 20, 2011 by mona*

**epidemiology**

A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is implemented. (Assume the ...
*May 21, 2011 by mona*

**Physics/ electricity**

Consider a square of side length a = 9.7 cm with charged particles at each of the corners. Three of the particles carry +9.3 nC of charge while the fourth particle carries -9.3 nC. In volts, what is the electric potential at the center of the square? Hint: Choose the potential...
*February 22, 2011 by Me*

**algebra**

. Victoria wants to plant a vegetable garden in the shape of a square. She has a space allocated in her backyard that will accommodate 175 square feet. Using the drawing below, use the FOIL method to find the polynomial that represents the area of the square. If x=6, will she ...
*March 9, 2014 by billy*

**GOVERNMENT**

Please help. I'm trying to figure these True or False questions. A President's threat to grant amnesty can sometimes convince Congress to make changes in a bill to satisfy the President's objections. T or F I think it's true. Am I right? As the nation has industrialized and ...
*April 19, 2007 by Suzi*

**Algebra**

How would you explain to a seventh grader the difference between the domains of an odd root radical function and an even root radical function? How would you change your explanation for someone who had taken high school algebra?
*December 10, 2014 by Candy*

**Social Studies**

True Or False Questions: The Crusades helped to increase the flow of trade in Europe The joint-stock company, in which individual men invested and profited in proportion to the number of shares purchased, was the principal instrument of England's overseas expansion. The first ...
*November 16, 2009 by Jim*

**Living Environment(please check answers)**

1-true 2-false 3-not enough info Transplanting genetic material into bacteria is a simple task- 2 Under certain conditions, bacteria reproduce at a rapid rate-3 The continued use of insulin from animals many cause harmful side effects in some people- 1 The bacteria used in ...
*March 12, 2012 by Anna*

**U.S. History**

TRUE OR FALSE (The First World War) 1. Until 1915, most Americans thought of the war as a European conflict that would have little effect in the United States. 2. Big Berthas were massive ships used to transport German troops. 3. The Treaty of Versailles demanded that Russia ...
*March 11, 2014 by Anonymous*

**civics**

the senate power of advice and consent does not apply to the federal judges true or fales . and what's the right answer. is it true
*August 10, 2009 by roc*

**is this true?!**

animals and other organisms that eat the food in an ecosystem are called PRODUCERS. i wrote true ami i right?!
*September 23, 2010 by Sara!*

**Math**

Write a TRUE equation and explain why it is true. Ex.) 4+3=7
*September 11, 2014 by Kim*

**math 115**

1. find the square root 121= 11 11*11=121 is this correct? 2.carlos works 8.25h. and receives $102.30 pay. what will he receive at the rate if he worked 14h?= carlos rate of pay is $12.40 per h. $173.60 is this correct? 3. write 0.672 as a percent. 67.0% is this correct? 3. ...
*September 6, 2009 by Lea*

**art help needed**

The last major painting of Manet's career, A Bar at the Folies-Bergere, reflects the artist's: optimism pessimism intense emotion positivism I see it was expressionism, but which of the answers given is a term related to that? i think it is positivism? Goya who "did not share ...
*February 17, 2009 by jeffery*

**geometry**

A square ABCD is inscribed in a circle. The circle is folded to form a semi-sircle, and another square EFGH is inscribed in this semi-cirlcle. Find the ratio of the area of the square EFGH to the area of the square ABCD.
*March 30, 2012 by hadi*

**Math**

An open box is made from a square piece of metal by cutting out a 4 inch square from each corner and turning up the sides. Find the area of the original square if the box is to contain: A) 16 cubic inches And B) 400 cubic inches
*January 30, 2013 by Nikki *

**ALGEBRA 1**

need help solving two houses are for sale on the same street.the second house has 1000 square feet less than twice the square feet of the first house. together the houses have 4400 square feet. what is the square footage of the first house? 2x-1000 = 4400 ???
*April 28, 2010 by DEBBIE*

**maths**

(Write the following expressions using numbers,parentheses and other mathematical symbols. You do not need to colculate the results) A)Double the sum of twenty-five and eight. B)The quotient of fifteen and three subtracted from the product of four and nine. C)The difference ...
*February 24, 2011 by Anonymous*

**11th grade**

Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
*November 16, 2010 by Matt*

**MATH**

The value V of a machine t years after it is purchased is inversely proportional to the square root of t+2. The initial value of the machine is $10,000. Find the rate of depreciation when t=5 . Round your answer to two decimal places. A. -381.80 PER YEAR B. -1889.82 PER YEAR C...
*September 19, 2011 by Roger*

**Math117**

how to do negative decimal exponets 2^-0.4545 Remember that a negative power is the same as the reciprocal... 2-b = 1/2b So you can compute the positive power, then take the reciprocal of the result. Yes but that works with decimal of course, use your calculator. square root ...
*June 28, 2007 by Maria*

**math**

The perimeter of the small square is one-third the perimeter of the large square. What are the side lengths of the squares? small square side = x large square side = x + 2
*March 31, 2010 by rebecca*

**Social Studies**

What do colonialism and imperialism both require? a) one country giving money to another b) two countries sharing c) two countries working together d) one country ruling another country D What is one negative effect of the huge oil reserves in Nigeria? a) deforestation b) ...
*October 4, 2013 by Anonymous*

**Ethics in Technology**

Which of these statements about the National Crime Information Center (NCIC) is true? A. The NCIC databases contain about 40 million records. B. Improper use of the NCIC has led to about 1 million false arrests. C. Local law enforcement agencies enter most of the information ...
*March 29, 2015 by Pat*

**algebra help**

My class is doing a unit on the "completing the square method" which is used to solve quadratic equations. I need help understanding this method. It's not making any sense right now! I have two problems and I need to figure out which number completes the square. Here are the ...
*January 4, 2007 by Bailey*

**Algebra - sqrts**

Square roots. Woohoo. Want to check some work I did. 1. Perform indicated operations 3sqrt[3]+2sqrt[27]-sqrt[12] 3sqrt[3]+2sqrt[3*9]-sqrt[2*6] 3sqrt[3]+3*2sqrt[3]-2sqrt[3] 3sqrt+6sqrt[3]-2sqrt[3] = 7sqrt[3] 2.Simplify sqrt[49x^12y^4z^8] = 7x^6y^2z^4 3.Multply (8sqrt[6]+3sqrt[2...
*November 6, 2007 by John*

**Physics 2**

The drawing shows four insulated wires overlapping one another, forming a square with 0.050-m sides. All four wires are much longer than the sides of the square. The net magnetic field at the center of the square is 91.5 µT. Calculate the current I.
*February 12, 2012 by Anne*

**Honors PRE CALCULUS**

Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
*November 16, 2010 by Matt*

**Honors PRE CALCULUS**

Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
*November 16, 2010 by Matt*

**math**

x^3 + 4x^2 + 14x + 20 use the root or zero feature of a graphing utility to approximate the zeros of the function accurate to three decimal places. I do not know how to use the root or zero feature on my calculator. If someone could just explain how to do it that would be ...
*August 20, 2009 by Hannah*

**Algebra2**

The perimeter of a square is 12 cm greater than that of another square. It's area exceeds the area of the other by 39 cm^2. Find the perimeter of each square.
*September 10, 2013 by Tim*

**English please check my answer**

Please check my answer thank you Cardiology is the study of the heart. Which of the following terms describes the foundation upon which the medical word is built that usually relates to the body organ involved ? A. Prefix B. Suffix C. Root D. Combining form My answer is Root (c)
*March 19, 2008 by Dakotah*