Saturday

November 28, 2015
Number of results: 63,690

**Calculus**

Two trucks start from the same point. One truck travels due east at a rate of 50 mph and the other trucks travels due north at a rate of 60 mph. At what rate is the distance between the two vehicles increasing 1 1/2 hours later? I think the answer is 55 mph because I added 60...
*February 6, 2011 by Katie*

**calculus**

A car leaves an intersection traveling east. Its position t sec later is given by x = t2 + t ft. At the same time, another car leaves the same intersection heading north, traveling y = t2 + 3t ft in t sec. Find the rate at which the distance between the two cars will be ...
*October 19, 2011 by sal*

**Calculus II**

For some constants A and B, the rate of production, R(t), of oil in a new oil well is modelled R(t)=A+Be^(-t)sin(2πt) where t is the time in years, A is the equilibrium rate, and B is the "variability" coefficient. Find the total amount of oil produces in the first N ...
*February 19, 2013 by Patricia*

**math**

Logarithm!!! Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c) log(12y) = 2 log(2) + log(3y) (d) log(5y) = log(20y) – log(4) (e) log(x) = log(5x) – log(5) (f) ln(25) = 2ln(5) (g) ln(1) = log(1) (h) ln(e) = log(10) (i...
*April 16, 2010 by Simon*

**Accents for Aubrey (maybe!)**

The Accents on the PC: Whenever you want to write the accents just make sure that your NUM LOCK (the top right side of your keyboard) is on; then, hold down the ALT key on the bottom left side of your keyboard and press the corresponding numbers (given below) on your number ...
*January 22, 2007 by SraJMcGin*

**Science**

The placement of metal and non-metal elements in the periodic table makes it possible to predict the formation of compounds. Which of the following chemical formulas indicates the formation of an ionic compound? a. KI b. ICI c. SO3 (the three is small) d. CHCL3 (the three is ...
*June 20, 2012 by Erika*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013 by Jake*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013 by Jake*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013 by Jake*

**pre-calculus urgent**

Please help me here as well to clarify more my understanding. Let a1, a2, a3, . . . be a geometric sequence with initial term a and common ratio r. Show that a1^2, a2^2, a3^2, . . . is also a geometric sequence by finding its common ratio. Given that the ratio for a1, a2, a3...
*August 15, 2015 by Alex*

**chemistry**

Which of these ions may be precipitated as sulfides? Assume neutral aqueous solution, pH=7. Silver (I) ion Sodium ion Calcium ion Lead (II) ion Manganese (II) ion Ammonium ion I think the silver I ion, lead II ion, and manganese ion may be precipitated as sulfides, but I'm not...
*February 27, 2008 by Sarah*

**Chem**

Which of these ions may be precipitated as sulfides? Assume neutral aqueous solution, pH=7. Silver (I) ion Sodium ion Calcium ion Lead (II) ion Manganese (II) ion Ammonium ion I think the silver I ion, lead II ion, and manganese ion may be precipitated as sulfides, but I'm not...
*February 27, 2008 by Sarah*

**calculus**

i understand optimization but im stuck on this problem.. mrs.day is building a new deck. she has 580 square feet to enclose. if one side is bounded by a wall, find the minimum cost to build the deck if one pair of opposite sides cost $12 per foot and remaining sides cost $19 ...
*January 2, 2011 by tiana*

**calculus**

A reservoir is in the form og the frustum of a cone with upper base of radius 8ft and lower base radius of 4 ft and altitude of 10ft. The water in the reservoir is xft deep. If the level of the water is increasing at 4ft/min., how fast is the volume of water in the reservoir ...
*April 27, 2013 by Light*

**calculus**

The number of Drosophila fruit flies in a controlled experiment assumes the following growth pattern when the food source is limited: N(t) = 120 1+11e−0.4t where t measured in days. A. How many fruit files were there in the beginning? B. What is the limiting number of ...
*July 16, 2014 by Anonymous*

**Calculus Physics**

A glass of orange juice is on the floor of a subway car traveling along a straight path at constant velocity. Everything's fine. The coefficient of static friction between the glass and the floor is 0.32. The subway suddenly accelerates forward. What is the maximum ...
*March 2, 2015 by danny*

**Calculus Physics**

A glass of orange juice is on the floor of a subway car traveling along a straight path at constant velocity. Everything's fine. The coefficient of static friction between the glass and the floor is 0.32. The subway suddenly accelerates forward. What is the maximum ...
*March 4, 2015 by Mik*

**Vector Table (physics)**

I have to find the magnitude and direction of a resultant vector from values obtained from a vector table. The values in the book that we had to follow and put on the balancing part of the weight table were in F1= (0.200)g N when calculating the value for R would I use it like...
*October 2, 2007 by ~christina~*

**chemistry**

Draw the Lewis structure of NO2- Assign formal charges to each atom in the O3 molecule shown below. Be sure to click the +/- button below (it will turn yellow when activated) before clicking on the molecule. .. .. .. :O--O==O .. .. Based on formal charges, what is the best ...
*November 14, 2008 by mandy*

**statistics**

1. The time required to complete a project is normally distributed with a mean of 80 weeks and a standard deviation of 10 weeks. The construction company must pay a penalty if the project is not finished by the dues date of the contract. If a construction company bidding on ...
*February 21, 2012 by Gracie*

**Math (trigonometry)**

From a boat on the water, the angle of elevation of the drop of a cliff is 31°. From a point 300 m closer, the angle of elevation is 33°. Find the height of the cliff. the answer should be 2411 m. I had tan31° = h/x+(x-300) tan33° = h/x-300 -> (x-300)tan33° = h. I subbed ...
*December 3, 2012 by Sammy*

**algebra**

The length of a rectangular garden is 5 ft less than 3 times its width. If the perimeter of the garden is 22 ft, find the dimensions of the garden. I will start you off with... let the width be w, then the length is 3w - 5 I am pretty sure you can form the equation from there ...
*May 13, 2007 by Dee*

**what does nontheistic mean?**

Can someone define it for me A theist believes in a theology of some sort, non-theists do not. Here are some excellent places to look up words or phrases: http://www.answers.com Usually, you'll get many, many results from various sources, so be sure to scroll down and keep ...
*December 9, 2006 by Kailin-Jasmines -sister*

**English ~CHECK MY WORK PLEASE~**

*Please Note: the the answer with stars next to them are my answers. 1. Imagine you have been asked to read another article about gymnasts. It has the following title and subheads: Title: Gymnasts: For the Love of the Sport Subhead #1: The Naysayers Subhead #2: Lasting ...
*February 4, 2014 by Sandy*

**Spanish**

I need to know what this question translates into in English. Does it mean, why is Spanish class important for you? Â¿QuÃ© tan importante es la clase de espaÃ±ol para ti? Yes, that is correct. It's: "Porque la clase de espanol es tan importente para ti?" Not how u wrote it.
*August 23, 2005 by Cara*

**math**

In 1654 Blaise Pascal invented Pascal's triangle,for which the first four rows are given: 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 --1 6 15 20 15 6 1 --1 7 21 35 35 21 7 1 Determine the ratio of the sums of the terms of the seventh and eighth rows. Is this answer correct? ...
*March 18, 2008 by Jas*

**Math**

I think the answer is wrong online so I would like to know what the correct answer is before I teach a student! If it takes 6 cubes to build 3 steps, how many cubes will be needed for 11 steps? It sounds so easy but my answer doesn't match the answer sheet. Thanks!
*August 4, 2008 by Teacher*

**physics**

Suppose that a grandfather clock (a simple pendulum) is running slowly. That is, the time it takes to complete each cycle is longer than it should be. Should one shorten or lengthen the pendulum to make the clock keep the correct time? Why?
*November 11, 2008 by Emeline*

**chem**

Would you expect jewelry made of an alloy of silver and copper to tarnish(react) in an environment where chlorine fumes exist? Why or why not? Im assuming yes because both silver and copper metals react with chlorine gas...I don't know if I am correct in answering so.
*March 18, 2009 by danny*

**C Programming**

This is what the program needs to do: Enter a temperature: 32.4 Enter 'C' for Celsius or 'F' for Fahrenheit: C Choose a conversion ('C' for Celsius or 'F' for Fahrenheit): F The temperature is: 90.3 F. How would I store the input when it asks for C or F, then use it to ...
*September 25, 2009 by gnozahs*

**psychology**

In psychology,correlation measure the strength of the link between two variables. It is also important to know that correlations do not show: a)the strength of the relationship b)causation c)the direction of the relationship d)what occurs between sets of observations IS B ...
*March 2, 2010 by vedrana*

**american government**

Campaign spending tends to be greatly more important: a)for Republican candidates b)for Democratic candidates c)for candidates in urban areas than candidates in rural areas d)for challengers and non-incumbents rather than incumbents IS d CORRECT ANSWER?THANK YOU:))))
*July 1, 2010 by vedrana*

**Chemistry**

Are these two answers correct? They are both true or false. Mendeleev was able to predict undiscovered elements. True The noble gases are chemically reactive under normal conditions. False (I don't know what is considered "normal conditions")
*December 24, 2010 by Cheryl*

**English**

Hello. I really appreciate your help and answers but I didn't quite understand one of them. Will you please clarify one more time if "he doesn't have any friends" and "he doesn't have friends" are both correct and if "any" makes any difference. Thank you very much for your time.
*May 15, 2011 by Ilma*

**ALGEBRA**

If the principal P = $900, the rate r = 7 1/2 %, and time t = 1 year, find the following. What is the amount of interest? What is the future value? Ok found I think I found the interest 900x0.075=67.50 is this correct.Now I need help in finding the future value.
*November 23, 2011 by MONICA*

**math**

A sample survey of 50 people in Harrisburg, PA indicates that 10 of them know the mayors name in the neighboring city. Out of 5,500 Harrisburg residents, how many would you predict know the name of the mayor of the neighboring city? I thought 1100. I did 10/50=x/5500, is this ...
*March 28, 2012 by confused*

**Chemistry **

Assume the diameter of a neutral helium atom is 1.40 x 10^(2)pm. Suppose that we could line up the helium atoms side by side in contact with one another. How many atoms would it take to make the distance 5.80 cm from end to end? How do I solve this, and what is the correct ...
*September 8, 2012 by Cassidy *

**Order of Operations**

Which choice gives the correct order of operations needed to find the value of 4(6+3)-24? A.+,x,= B.x,+,- C.-,x,+ D.+,-,x A? What is the value of the expression 7(3x18-10)? A.53 B.168 C.186 D.308 D? Simplify 4(3+2)+2(16/4) A,88 B,44 C,32 D,28 A? Simplify 451+5x5 A.461 B.476 C....
*September 11, 2012 by Derrick*

**Cultural Anthropology**

A Big Man’s position differs from a chief’s position is not based on wealth. is based on personal skills and charisma. is an ascribed status. is reinforced through supernatural authority. My answer is a ascribed status is this correct?
*January 20, 2013 by Beth*

**Chemistry**

Which of the following represent conjugate acid-base pairs? For those pairs that are not conjugates, write the correct conjugate acid or base for each species in the pair. a. HS-4-,SO4^2- B. HBr, BrO- c. H2PO4-, PO4^3- d. HNO3, NO2-
*March 10, 2013 by Juan*

**Math**

A study determines that 60% of the voters in a town intend to vote for the incumbent mayor. If a sample of 8 people is selected, using the binomial formula, what is the approximate probability that 6 of the 8 people surveyed intend to vote for the incumbent? A. 0.47 B. 1.28 C...
*April 6, 2013 by Tony*

**Hamlet (check)**

An impending war is evident because: a. Young Fortinbras wants revenge b. Denmark king wants his territory back c. Hamlet killed young Fortinbras and took over his land d. Numerous omens are evident i choose B, is that correct?
*May 19, 2014 by Scarlet*

**French **

Are these sentences correct? 1. Je veux des vêtements en lin. Les or des in this case? 2. Je veux la table pour mon cousin qui habite aux États-Unis. Is there a contraction between "qui" and "habite"?
*September 8, 2015 by Anonymous*

**Math**

1. You are having a discussion about sequences with your classmate. She insists that the sequence 2,3,5,8,12 must be either arithmetic or geometric. Is she correct or incorrect? Explain. Can you help please 2. Determine whether the sequence is arithmetic, geometric, both, or ...
*October 9, 2015 by May*

**math**

The value of a car depreciate each year by 5% of its value at the beginning of that year . lf its value when new on first January 2000 was 10250, what was its value in January 2009, when it was 9 years old? give your answer, correct to three significant figures?
*October 28, 2015 by faith*

**physics**

Given the vectors = (19 cm, -7 cm) in green and = (-23 cm, 9 cm) in blue shown on the grid below, calculate the magnitude of the vectors described below and select the correct sketch for each from the choices below. The tail-to-head method is used to represent the operations ...
*October 15, 2013 by butcha*

**Taking notes**

What are some of the steps…. taking notes while preparing for a outline, introduction, etc.? ****I HAVE ONE AND NEED SOME HELP. I WOULD ALSO LIKE TO BE SURE I AM ON THE RIGHT TRACK WITH TH EONE I HAVE SO FAR**** 1. For best results, take notes in the margins while reading and ...
*October 7, 2010 by confused by adverbs and adjectives*

**chemistry**

NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid dissolves) is 22.4°C. ...
*November 16, 2012 by DeeDee*

**Biology**

Father has red/green color blindness and is a hemophiliac. Mother is normal. Have two female children (Both are probably carriers). One female offspring marries a normal male. The question is what is the probability that their son is both color blind and hemophiliac? ...
*October 14, 2013 by Frank*

**Reading please please help**

2. In several of the selections in this unit, immigrant parents play an important role. How does the fact that some of these parents are immigrants affect their children? Choose two selections and explain your answer. hi im sure some of you have read daystar I stand here ...
*November 15, 2013 by Jessie*

**Math+Growth/Decay**

3e^2x = G -3e^2x = G -3e^-2x = D 1/8e^2x = G -1/8e^-2x = D Would that be correct? I just made these examples up in my head. How can you tell if its growth or decay? I just look at the exponents. If is a negative then its decay? if its positive then its growth?
*March 11, 2009 by Chopsticks*

**algebra**

simplify the following radical expression: 3 sqrt (-27) a) -3 b) 3 c) 0 d) no solution exists do i write the sqrt like this or do i write like this sqrt () 3 -27 please show me the correct way to write it thanks
*June 17, 2010 by anthony*

**math**

Here are my attempts. Let me know if they are correct please> :) Thanks Question (Find quotient): 9a^2-25b^2/3a-5b My answer: 3a+5b Find Quotient: y^4+3y-5/y^2+7 My answer: y^4+3y-15/y^2+7 y^2+3y+8 Find Quotient: This one i am confused on the ^the power signs.. 6x^3-9x^2+5x...
*July 17, 2011 by Mary Anna*

**Maths**

Three towns p,Q and R are such that the distance between P and Q is 50km and the distance between p and R is 90km.if the bearing of Q from P is 075 and the bearing of R from p is 310, find the distance between Q and R correct to the nearest Km.
*July 28, 2011 by Reuben49*

**math**

if (2x-3):(y+4)=k where k is a constant and x=4 when y=2 then find x when y=-6 What does the : between the factor mean? (2x-3) : (y+4)=k Multi[lication? If so, substitute 4 for x and 2 for y to get (2*4-3):(2+4)=k = 5*6 Then solve for x in (2x-3):(-6+4)=30 If it means ...
*October 7, 2006 by Gina*

**Belinda, Math**

Thank you I did figure it out i think: so the problem was ((w)-(1)/(4))^2 The final answer that i got was w^2-(1)/(2)w+ (1)/(16) Sorry, no again. :) Make sure you really look at how to multiply binomials and FOIL them out. It will come back to haunt you. a lot. These are the ...
*January 24, 2007 by Jasmine20*

**Physics**

A projectile is launched with 200kg m/s of momentum and 1000 J of kinetic energy. What is the mass of the projectile. The answer is said to be 20 kg but I can't get it. I tried this but it didnt work: p=mv=200 m=200/v I plugged that into this equation: KE=1/2mv^2=1000 = 1/2(...
*October 23, 2007 by Marisol*

**statistics**

Commuters were asked how many times a week they stop for coffee on their way to work. A survey found a mean of 3 times a week with a standard deviation of 0.55. What is the probability that in a group of 36 people they stop between 2.8 and 3.25 times per week?
*December 3, 2012 by Alley*

**Stats**

Commuters were asked how many times a week they stop for coffee on their way to work. A survey found a mean of 3 times a week with a standard deviation of 0.55. What is the probability that in a group of 36 people they stop more than 3.2 times per week?
*December 3, 2012 by Alley*

**physics**

A 5 kg ball rolls off a 34 m high cliff, and lands 29 m from the base of the cliff. Express the displacement and the gravitational force in terms of vectors and calculate the work done by the gravitational force. Note that the gravitational force is < 0, -mg, 0 >, where ...
*March 20, 2013 by Anonymous*

**Physic**

The maximum speed of a mass attached to a spring is vmax = 0.438 m/s, while the maximum acceleration is 1.53 m/s2. What is the maximum displacement of the mass? (Answer: 0.125m) Answer is provided above. Please show all work on how to get the answer. Thank you.
*May 22, 2014 by Anonymous*

**Calculus (pleas help!)**

Consider the function f(x)=12x^5+60x^4−100x^3+4. For this function there are four important intervals: (−INF,A], [A,B] ,[B,C] , and [C,INF) where A, B, and C are the critical numbers. Find A, B, and C. At each critical number A, B, and C does f(x) have a local min...
*March 31, 2011 by Karku*

**Math: Pre-calculus**

A rancher wants to build a rectangular pen with an area of 180 . Let W be the width of the pen and L be the length of the pen. a) Find an equation for the perimeter P in terms of W and L . b) Use the given area to write an equation that relates W and L . c) Find the pen ...
*October 6, 2013 by Sarah*

**pre-calculus**

A company plans to manufacture a container having the shape of a right circular cylinder, open at the top, and having a capacity of 24pi cubic inches. If the cost of the material for the bottom is $.30 per square inch and that for the curved sides is $.10 per square inch, ...
*January 23, 2014 by Nikki*

**Chemistry**

Pb(s) + KNO3(aq) ----> No reaction HNO3(aq) + Sr(OH)2(aq) ----> H2O + Sr(NO3)2 NO3 being Nitrate, and (OH)2 meaning 2 Oxygen and 2 Hydrogen atoms in the second problem. The second two in the products of the second problem is a subscript for NO3. Are these correct? Thank ...
*January 31, 2009 by Momo*

**physics **

Find Beta and Gamma for an electron that has a kinetic energy of 6.00 keV. â? gamma = KE/MoC^2 + 1 Beta = 1/gamma^2 + 1 gamma = 1.011723381 Beta = 1.9769592 I got gamma correct but my answer but im getting gamma incorrect can anyone explain what could be wrong
*April 17, 2010 by Andy *

**math **

if Amy stands 36 feet from a flagpole and the angle formed from the top of the flagpole to her feet is 38 degre, find the distance from her feet to the top of the flagpole. include correct units in your anwser and round to 2 decimal places...
*February 16, 2011 by joey*

**Finance**

Interest rates on 2-year Treasury securities are currently 5.00%, while 5-year Treasury securities yield 10.00%. If the pure expectations theory is correct, what does the market believe that 3-year securities will be yielding 2 years from now?
*October 5, 2014 by Morgan*

**english**

Are the following sentences correct, gramatically? If yes, is there any difference in meaning between them? 1. Teacher spoke to the concerned parents 2. Teacher spoke to the parents concerned
*March 10, 2009 by Bijoy*

**Chemistry**

Is this the correct equation for the formation of [Co(NH3)5(ONO)]^2+ from [Co(NH3)5Cl]^2+ ... [Co(NH3)5Cl]^2+ + NO2 --> [Co(NH3)5(ONO)]^2+ + Cl- I'm a bit unsure because the charges don't balance
*April 8, 2009 by Alice*

**sentence structure**

does my first sentece have the correct use of a comma? If i believe in Jesus Christ, i will be saved. If i believe in Jesus Christ i will be saved.
*August 17, 2010 by Amy*

**Chemistry**

40. An element has the configuration [He]2s^2. a. Which element is it?- Beryllium b. Is it metal or nonmetal?- metal c. How many valence (or outer shell) electrons does it have?- 2 valence electrons. Is this correct? Thanks -MC
*October 25, 2010 by mysterychicken*

**Chemistry(Please check)**

A reaction has a rate law, rate = k times A times B squared. What is the overall order of the reaction. I think that the order is 0. Is this correct?
*February 19, 2012 by Hannah*

**math**

IF 7/12 CLASS HAS BROWN HAIR 2/12 HAS RED HAIR ,WHAT FRACTION MORE OF THE STUDENTS HAVE BROWN HAIR THAN RED HAIR, I GOT AN ANSWER OF 7/12 AM I CORRECT
*August 28, 2012 by Americal*

**Math**

Sara traces circle stencils for her project. She needs 4 rows of 6 circle stencils. She thought that 4 rows of 6 is the same as 3 rows of 8 and 2 rows of 8. Is this correct? Explain.
*October 18, 2012 by Neo*

**elementary**

number sense fabio said that there are 3 times as many people on a basketball team as on a tennis team.is he correct?why or why not. tennis 2 players basketball 5 players
*October 25, 2012 by josh*

**Elementary**

number sense fabio said that there are 3 times as many people on a basketball team as on a tennis team.is he correct?why or why not. tennis 2 players basketball 5 players
*October 25, 2012 by swetha*

**English**

1. A: Where can we hear this announcement? B: We can here it in an airplane. 2. A: Where can we hear this announcement? B: We can here it on an airplane. -------------------- Q1: Do we have to use 'in' or 'on'? Q2: Is the expression 'announce' (from athe pilot) correct?
*April 13, 2015 by rfvv*

**English**

1. My skin always peels when I've been in the sun. 2. My skin always peels when I am in the sun. ============== Which one is right? Are both correct? What is the difference between them?
*July 13, 2015 by rfvv*

**reading**

I dont understand the prefix suffix and root of navajo but i think that there is no suffix and prefix but root is navajo am i correct? Plz answer ASAP
*November 11, 2015 by nikoleta*

**english - repost last**

11) (A) No Chinese or Indian object--indeed, (B) no object of any kind from Asia--has been found in the Americas in archaeological levels (C) that date to pre-Columbian times. A) No Chinese B) no object of any kind C) that date to D) No error My answer is ( C ) 12) Very few ...
*May 27, 2008 by rose- Ms. sue*

**physics**

A 10 ohms resistor has a constant current. If 1200C of charge flow through it in 4 minutes what is the value of the current? A) 3.0 A B) 5.0 A C) 11 A D) 15 A E) 20 A ok I used the I=Q/t, 1200C/240s to get 5A which is an answer. You said I was right but when I look back on ...
*March 14, 2007 by susan*

**Ap Chemistry**

2-propanol has a delta Hvp of 701 J/g and a vapor pressure of 31.6 mmHg at 20.0 degrees C. Estimate the normal boiling point of this alcohol in degrees C. i used the clasius-clayperon equation and this is what i have so far. ln (31.6 mmHg/760 mmHg)= (-701 J/g)/8.314 J/g C (1/ ...
*January 23, 2008 by John*

**AP CHEM**

2-propanol has a delta Hvp of 701 J/g and a vapor pressure of 31.6 mmHg at 20.0 degrees C. Estimate the normal boiling point of this alcohol in degrees C. i used the clasius-clayperon equation and this is what i have so far. ln (31.6 mmHg/760 mmHg)= (-701 J/g)/8.314 J/g C (1/ ...
*January 24, 2008 by John*

**CHEMISTRY**

Here's one last equation I can't balance: Al{subscript 2}(SO{subscript 4}){subscript 3} + ZnCl{subscript 2} -> AlCl{subscript 3} + ZnSO{subscript 4} Please help, and thanks again. Responses Al2(SO4)3 + 3ZnCl2 ---> 2AlCl3 + ?___ZnSO4 What is your thinking? What goes in ...
*October 13, 2008 by Anonymous*

**chemistry**

Based on the balanced equation, 10Li + N2F4 → 4LiF + 2Li3N calculate the formula units of LiF formed when 54 molecules of N2F4 are reacted. since one mole of N2F4 yields 4LiF, then 54N2F4 yields 216LiF, am i correct
*February 10, 2010 by eng*

**physics help**

a 3.5 kg dog stands on a 21 kg flatboat at distance D = 6.1 m from the shore. It walks 2.3 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore. I thought i have the right equation but my...
*March 26, 2010 by mike*

**research writing as a process**

Which of the following is a goal you may want to accomplishin a research project? to formulate a thesis statement to think about the purpose of the research project. to pick something you wrote a paper on last year and just correct the errors to analyze my answer to analyze
*April 28, 2010 by Christopher*

**Philosophy**

Prove informally, by employing correct definitions and principles of reasoning, that the following are true. 1/ Every formula implies itself. (That is, A implies A . Hint: For this one you will need to employ the definition of interpretation.) 2/ If set S implies formula A , ...
*October 22, 2010 by Maggie*

**PHYSICS**

A .01kg bullet traveling at 800m/s hits a disk with a radius of R=.1m at R/2 and leaves with a speed of 400m/s. what is the angular speed of the disk right after? (omega) I used conservation of momentum and the rotational inertia for a disk and found omega to be 8rad/s. Is ...
*November 30, 2010 by Taylor*

**algebra**

Sheila leaves her home to go to her sister's house, which is a 24-mile drive. The trip takes 36 minutes. She returns home taking the same route at a speed that is 5 miles per hour faster. How many minutes did the trip home take? I came up with 33 is this correct?
*April 17, 2011 by mary*

**English**

Hello. I'll be very grateful for your help. 1) Is it possible to use "security maintenance" in the sentence: "The country has made progress in security maintenance" or is it better to say "in maintaining security"? 2) Is the sentence correct: "The resolution makes provision ...
*December 9, 2011 by Ilma*

**math**

The value of a $20,000 car decreases every, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct answer. ...
*April 21, 2012 by Jane*

** please check my answer**

Consider the following equations. N2H4(l) + O2(g) N2(g) + 2 H2O(l) ÄH = -622.2 kJ H2(g) + 1/2 O2(g) H2O(l) ÄH = -258.5 kJ H2(g) + O2(g) H2O2(l) ÄH = -187.8 kJ Use this information to calculate the enthalpy change for the reaction shown below. N2H4(l) + 2 H2O2(l) N2(g) + 4 H2O(...
*November 6, 2012 by hannah*

**7th grade math Ms. Sue please last question**

You have $59.95 in your wallet and want to buy some new CDs. If the CDs are $11.99 each, what number of CDs, x, can you buy? Write and solve an inequality. I need to show every step. Is this way correct? 11.99x = 59.95 11.99x ÷ 11.99 = 59.95 ÷ 11.99 x = 5
*December 18, 2012 by Delilah*

**Language art**

Just this one question please . 1.According to the MLA style, how should you format the title of a magazine article? A . In italics B. in quotation marks C. With underlining Please thankyou and anyone who has taking this please can you give me the correct answer? Thankyou ...
*February 4, 2013 by Dave*

**Physics**

Which of the following statements about emission spectra is correct? All the lines are evenly spaced. All noble gases have the same spectra. Each line corresponds to a series of wavelengths. All the lines result from discrete energy differences
*February 11, 2013 by physics student*

**math 1 question**

Suppose you are building a brick border for a garden by stacking rows of bricks on top of each other. If the height of each brick is 2.5 inches and r represents the number of rows, which algebraic expression would represent the height of the brick wall? 2.5 + r*** 2.5r + r 2.5...
*September 6, 2014 by SkatingDJ*

**LA - The Story Teller**

"The Story-Teller" by Saki The children frequently interrupt the aunt's story to ask petulant questions. Given the this context, what is the meaning of the word petulant? rude and impatient*** calm and quiet interested and intelligent tired and enthusiastic Is my answer ...
*September 30, 2014 by SkatingDJ*

**Math**

A submarine begins at -125 below sea level. If the submarine travels at 20 feet per minute, how many minutes would it will take the submarine to rise to the surface and then defend to -104 feet? A: 6 1/4 B: 11 2/9 C: 5 1/5 D: 11 9/20 I said C but it was wrong. how do i solve ...
*October 7, 2014 by Reid*