Thursday

October 30, 2014

October 30, 2014

Total # Posts: 141

**Science Help**

1.) A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s. What is the ...
*October 18, 2014*

**Physics**

a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 10 m/s. the cliff is 48 m above the water's surface as shown. how long does it take for the stone to fall to the water? the acceleration of gravity is 9.81 m/s2. answer in units of s
*October 17, 2014*

**Physics**

A horizontal force of 150 N is used to push a 42.0-kg packing crate a distance of 6.60 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following.
*October 1, 2014*

**College Algebra 1**

Using the factoring method, solve for the root: 10x^2-41x=-21
*August 23, 2014*

**trig**

In 60 ft. Run sith a 21 degree slope what is rise(ft)
*July 16, 2014*

**statistics**

A committee of three people is to be formed. The three people will be selected from a list of five possible committee members. A simple random sample of three people is taken, without replacement, from the group of five people. Using the letters A, B, C, D, E to represent the ...
*July 16, 2014*

**Automotive Engine Types **

A 2.2 liter engine would have a displacement of approximately
*June 18, 2014*

**MATH Graph**

Go on the point of origin (0). Rise up 1 and make a dot. Then from that point go rise up one and go over to the right two spots. Keep repeating until you are satisfied.
*June 3, 2014*

**Calculus**

x(x^2-1)^3 using change of variable
*May 21, 2014*

**Calculus**

so is it a problem if I used dA/dx instead?
*May 21, 2014*

**Calculus**

Reiny you are a Godsent Thanks Alot ^_^ Feeling more confident for finals now!
*May 21, 2014*

**Calculus**

a rectangular storage area is to be constructed along the sides of a tall building. A security fence is required along the three remaining sides of the area. What is the maximum area that can be enclosed with 1000m fencing?
*May 21, 2014*

**Calculus**

Thanks Alot I was really puzzled on this one.
*May 21, 2014*

**Calculus**

a meteorite slams into the earths crust and penetrates d=(1200t-36000t^2)m in t seconds after impact. What is the maximum depth of penetration?
*May 21, 2014*

**Math**

Find the period and the amplitude of the periodic function y=3cos 4x
*May 19, 2014*

**Math**

Suppose there is a cow that is tied to the corner of a barn with a rope as shown in the figure below. One side of square barn measures 50 yards and all the doors on the barn are closed, so the cow cannot enter the barn (he must walk around the sides only). How large of an area...
*April 24, 2014*

**math**

how do I find the product for 15x3 1/5 using distributive property,help please
*March 31, 2014*

**math**

Anna uses 5/6 tank of gas each week driving to work . How many tanks of gas does Anna use in 1 2/3 months.
*March 24, 2014*

**Algebra**

Graph the rational function x/(x-6) To graph the function, draw the horizontal and vertical asymptotes (if any) and plot at least two points on each piece of the graph.
*March 24, 2014*

**Statistics**

The following is a list of 13 measurements: -38,-89,-47,-43,-70,59,92,97,23,-11,-62,-22,-5. Suppose that these measurements are respectively labeled X1,X2,...,X13 Find the sum when i=1 Xi/30.
*March 23, 2014*

**Algebra**

The original price of a pair of jeans is $80. A store marks a pair of jeans as discounted at 40% off. It then has a store wide clearance of 20% off all marked prices. If you come during the sale and use a "40% off" coupon to buy the jeans will they be free? Why or ...
*September 8, 2013*

**Algebra**

Negative three times the sum of a number and one is less than or equal to the difference of 5 times the number and 9.Graph the solutions.
*September 8, 2013*

**Algebra**

Gail and her brother Henry had a combined age of 47. If Gail was twice as old as Henry ten years ago, how old is Gail today?
*September 8, 2013*

**physics**

During the second stage of a rocket launch the rockets upward velocity increases from 980 m/s to 9000 m/s with an average acceleration of 33 m/s*. How long did the acceleration last??
*September 6, 2013*

**math**

please show me how to solve this (2x - 5y) power of 2 i am having a problem with the way to step by step please solve this
*April 23, 2013*

**physics**

A metal block of mass 5kg lies on a rough horizontal platform.If a horizontal force of 8N applied to the block through its centre of mass just slides the block on the platform,then the coefficient of limiting friction between the block and the platform is
*February 24, 2013*

**math**

You deposit $6,700 in a money-market account that pays an annual interest rate of 3.3%. The interest is compounded quarterly. How much money will you have after 4 years?
*February 6, 2013*

**chemistry**

what mass of aluminum hydroxide needs to be consumed to neutralize 1.25L of stomach acid (HCl). Stomach acid has a pH of 2.2
*November 29, 2012*

**chemisty**

What volume of 0.250 M calcium chloride needs to be added to sodium phosphate to produce 35.0g of calcium phosphate?
*November 29, 2012*

**Pre-Cal**

1.y=f(x) 2.x=f(y) Is the second equation an inverse of the first equation or is it no a function?
*November 22, 2012*

**CHEMISTRY: URGENT**

1) the element Q has the electronic configuration 1S2, 2S2, 2p6, 3s2, 3p6, 4s2 3d10, 4p1. Write the atomic #. Q exist as 69Q and 71Q. What is the significance of the 2 #'s. What does it mean. B) find the atomic mass if 69Q is 60% anf 71Q is 40%
*November 6, 2012*

**Math**

A function whose domain is all reals, and which maps all rational numbers to 1 and all irrational numbers to 0.
*September 20, 2012*

**Algebra..**

Help ? Find the slope of the line that is a) parallel and b) perpendicular to the given line. 1. x=-8 2. y=10
*September 14, 2012*

**Physic**

One gallon of paint (3.79 Liters) covers an area of 26.0 m2. What is the thickness (in mm) of the fresh paint on the wall. Please help, I have no idea where to start thank you!
*August 25, 2012*

**criminal justice**

You have completed your investigation on allegations against a plant employee of an acquired corporation, Lake Inc. That is based on the basic information given below. Create a report on the results of your investigation and present final results that your investigation has ...
*August 4, 2012*

**math**

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). Three batteries are connected in series so that the total voltage is 54 volts. The voltage of the first battery is ...
*July 6, 2012*

**writing essay**

i think is c is it right?
*June 21, 2012*

**criminal justice**

what is the rational for allowing warrtless searches? Are those reasons persuasive?
*May 20, 2012*

**chemistry**

A 0.6996 g sample of a compound containing C, H, and F was burned to produce 0.6039 g CO2 and 0.1235 g H2O. If the molar mass of the compound was determined to be approximately 102.0 g/mol, what is its molecular formula?
*January 20, 2012*

**geometry**

what is the maximum broadcasting radio from a radio tower 1800ft tall the radius of earth is 3960 miles and you can assume thtat the ground around the tower is nearly flat
*January 9, 2012*

**Calc I**

with finding the area under a line i need to find anti derviatives for: e^3x dx Cos^4 x Sinxdx e^(x^2) xdx e^x^2 dx Cos(3x)dx
*December 8, 2011*

**Math**

v=pir^2 v=(22/7)*7^2 v=154 cubic units
*November 13, 2011*

**calculus**

a rectangular box with a square bottom is to have a volume of 1000 cubic inches. the bottom cost $100 per cubic inch, the sides are $25 per square inch and there is no top. what are the dimensions of the box that has materials costing the least
*November 13, 2011*

**chem**

given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).
*September 27, 2011*

**chem**

given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).
*September 27, 2011*

**MATH**

x+0 2x+93 3x+186
*September 26, 2011*

**United States Government**

Capitalism is a system that may be seen as the economic equivalent of what political ideology? a. Republicanism b. Anarchism c. Classical liberalism d. Communism e. Socialism Is it Socialism? But all of these listed opposed against capitalism.
*September 24, 2011*

**Government US**

Totalitarianism differs from authoritarianism in allowing no a. voice in government b. veto over legislation c. political parties d. personal freedom e. elections I cant quite figure this out and even if I can I am very unsure. I would say political parties. Could you confirm ...
*September 24, 2011*

**physics**

A hammer strikes a nail with a 25 N force for 0.05 s. Calculate the impulse of the hammer?
*September 23, 2011*

**GCSE mathematics**

in the diagram,AB=AC and angle ABC=34
*September 22, 2011*

**science**

a car with a mass of 2000 kg moves along the ice with a constant velocity of 10.0 m/s. What is the car's momentum? a. 200.0 N b. 20.000 N c. 200.0 kg x m/s d. 20,000 kg x m/s I know it is twenty thousand, I'm unsure of the measurements or units. Please explain.
*September 21, 2011*

**Macroeconomics**

I need help with this you are start a company and are trying to decide between two diffrent industries. You are doing your final research before youw write your business plan INDUSTRY A HAS 20 FIRMS AND A CONCENTRATION RATIO (CR) OF 30% 1.WHAT IS THE NAME FOR THIS TYPE OF ...
*September 2, 2011*

**algebra**

simplify the expression (x+3y-5z)-(x-2y+3z)
*August 20, 2011*

**math**

From the top of a fence, the angle of depression to a flower on the ground is 72°. The top of the fence is 8 feet above the ground. How far is the flower from the bottom of the fence?
*June 20, 2011*

**Math-Algebra 1**

You know the rule that integers that do not divide evenly by two are odd integers. 51 is not divisible by 2. You conclude that 51 is odd.
*June 12, 2011*

**Basic Math**

I cannot figure this one out 12x+13y(12+6). Please help!
*May 31, 2011*

**programing**

5.Write a query to display the details of employees in the shipping' department who were hired after '01-JAN 1990' note that the query must use a join. 6.Write a query to display all unique department_id's in the employees table. 7.Write a query to display the ...
*May 9, 2011*

**programing**

10.Write a query to display the name, salary, department_name and job_title of all employees whose salary is greater than $10.000
*May 9, 2011*

**programing**

3.Write a query to display the annual salary of all employees in department_id 20. Display the names in increasing order or salary. 4.Write a query to display the average salary of employees. Label the column as ' Average Salary. 5.Write a query to display the details of ...
*May 9, 2011*

**programming**

1.Write a query to display the names of the employees that do not have any department_id. 2. Write a query to display the names, salary and job_id of employees in department_id 40, 60 and 80. Display the name as a single column and label it as Full_Names.
*May 9, 2011*

**U.S. History**

What started the first ever American Civil War?
*May 7, 2011*

**Spanish**

Dude wtf!?!???!??!!!! how did I even end up on this site???
*April 18, 2011*

**Fin 324**

Using the following data, compute net sales sales discounts 50,000 Accounts receivable, ending 125,000 Gross Sales 2,500,000 Inventory, ending 200,000 sales returns and allowances 75,000
*March 22, 2011*

**Finance**

Calculate the accounts receivable period, accounts payable period, inventory period, and cash conversion cycle for the following firm: Income statement data: Sales 5,000 Cost of goods sold 4,200 Balance Sheet Data: Beginning of Year End of Year Inventory 500 600 Accounts ...
*March 22, 2011*

**physics**

p=mv p(thrown)=(.163)x(9.37) =1.52731 p(hit back)=(.163)x(16.7)= 2.7221 (negative) 1.52731-(-2.7221)=4.24941 = impulse. p.s. !@#$%^& you.
*February 27, 2011*

**Math**

A shoe company will make a new type of running shoe. The fixed cost for the production will be $54,000. The marginal cost will be $25 per pair of shoes. The shoes will sell for $115 for each pair. a) Write the cost function b) Write the revenue function c) Find the number of ...
*January 19, 2011*

**com156**

Explain the initial steps of writing an essay. Identify how your audience, purpose, and content will influence your approach.
*October 28, 2010*

**English**

i think its really good to tell your children what you did when you were younger because sometimes is gonna help them to know what is good and bad for them
*October 6, 2010*

**Math**

Rosita earns money by walking dogs after school and on weekends. She walks madeline evry other day. Buddy every fourth day, and Ernie every fifth day. Today she walked all three dogs. How many days will it be before Rosita walks Madeline and Buddy on the same day.
*September 30, 2010*

**4th grade reading**

this story is showing that this house is a haunted one and you should alaways be careful
*September 11, 2010*

**Calculus**

3.75
*July 17, 2010*

**CHEM HELPP!**

0.16g MnCl2
*April 12, 2010*

**Calculus**

Thank you Bobpursley. After doing what you told me, the point of contact I got is, (-1,7). Is this correct?
*February 22, 2010*

**Calculus**

Could someone please help me with this question; Find the tangent to the curve y=x^2-8x+14 which slope is -2. Show that this tangent touches the curve y= -x^2-4x+4. Find the point of contact. Thank you.
*February 22, 2010*

**Calculus**

Thank you drwls, But how do I equate the two equations? I know the answer is 8, but I can't solve it properly.
*February 18, 2010*

**Calculus**

Could you please help me with this question: Determine the values of x so that the tangent to the function (y=3/cubic root of x) is parallel to the line x+16y+3=0 Thank you
*February 18, 2010*

**Biology**

Could someone please help me answer the following questions; 1. What unique property of carbon is responsible for the large number of organic compounds? 2. Alkanes, alkene and alkynes are all insoluble in water whereas alcohols, aldehydes and ketones are. Explain Thank You
*February 10, 2010*

**Calculus**

Could someone please help me with these questions;I was having trouble with these four questions. Evaluate each limit, if it exists, using any appropriate technique. 1.) The limit as u approaches 4; u^2-16/u^3-64 2.) The limit as x approaches 1; x^3+ x^2-5x+3/ x^2-2x+1 3.) The...
*February 9, 2010*

**math**

Or add four days time and include x. then multiply 52 by 5 after that solve for x day time 1+2+3+4+x=52*5
*January 22, 2010*

**math**

Thank you for helping bobpursley I forget to put 1 for (1 + .0875). Here is what I solve this: y(1+.0875)=40 1.0875y=40 y=40/1.0875 y=$36.78 Thanks
*January 22, 2010*

**math**

What is original value if the total is 40 and the sale tax is 8.75%? y * 8.75 = 40 is this the setup to solve the problem?
*January 22, 2010*

**Chemistry**

Could someone please help me with the following questions; 1.) Formic acid reacts with hydroxybenzene to form? 2.) For the synthesis of methyl butanoate from an alkene and alcohol, what should I use? 3.) Synethesis of an alkene from 2-propanone. Thank you.
*January 13, 2010*

**French**

Hi there, could you see if the following points make sense, it's a biography on Vanessa Paradis. _________________________________________ Vanessa Chantal Paradis est née le Décembre 22, 1972 à Saint-Maur-des-Fossés. Elle a grandi avec une ...
*January 10, 2010*

**business**

help me with this above
*January 8, 2010*

**French**

Hi there, could you see if I have translated the english correctly into french. Thank you very much. 1.) Dear Diary, Lately, I have been keeping a close watch on the mayor, Madeleine. I believe that Madeleine is hiding something, something very dark. Little evidence has led me...
*December 17, 2009*

**Statistics**

A. the arithmetic mean sometimes has two values
*December 17, 2009*

**social syudies**

Why can't the united states make as much money as they want?
*November 30, 2009*

**programming**

Write a query to display the detail of employees whose names start with 'A' and are in any one of the following departments; 20, 60, 100.
*October 11, 2009*

**programming**

Write a query to display the employee last name, email, phone_number, hire_date, and department_name of all employees who earn a commission.
*October 11, 2009*

**programming**

.Write a query to find the earliest hire_date in each department in the Employees table.
*October 11, 2009*

**8th grade**

Great Britian gradually raised its taxes because #1 they couldnt pay taxes to the king#2price of tea raised
*October 8, 2009*

**pre-calc graphing**

Sketch the graph of f(x)= [ (1/2) tanx + 1 ] as x varies from pie/2 to 3pie/2
*August 2, 2009*

**pre-calculus**

given x = 1,110 degrees Find sinx, cosx, tanx, cotx, secx, cscx, without using a calculator. Each result should be a fraction. No decimals involved... I dont even know where to begin, i missed a class, so please explain the work fully, Thanks kenny
*July 31, 2009*

**Chemistry**

The specific heat of aluminum is 0.0215 cal/g °C. If a 4.55 g sample of aluminum absorbs 2.55 cal of energy, by how much will the temperature of the sample change?
*June 14, 2009*

**culture diversity**

when an oppressor uses race to determine who is and is not privileged, means what stereotype, or etc
*May 21, 2009*

**culture diversity**

what term would be use to an oppressor that uses race to determined who is and is not privilged
*May 14, 2009*

**culture diversity**

what term would be use to an oppressor uses race to determine who is and is not privileged.
*May 14, 2009*

**culture diversity**

What's the common definition term of social ranking by social wealth
*May 14, 2009*

**6th grade math**

i need some help with determing surface areas of rectangular solids please. thank-you
*April 7, 2009*