Wednesday

March 4, 2015

March 4, 2015

Total # Posts: 325

**Physics**

In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straight-away at 67.5 m/s. The driver of the Thunderbird realizes he must make a pit stop, and he smoothly slows to a stop over a distance of 250 m. He spends 5.00 s in the pit ...
*January 23, 2015*

**Life Span Development**

According to Selman’s stages of friendship, stage 4 requires an individual’s increasing ability to balance
*December 16, 2014*

**Math**

(6/x^2+5x+6) + (9/x+3) express answer in reduced form What i attempted is to factor out the bottom half of the first fraction to 6/(x+2)(x+3) the second half i'm guessing would be to multiply each side by the x+3? making it a (6x+18/(x+2)(x+3)) + 9 or would i write it as 6...
*December 8, 2014*

**Math**

the series a_n doesn't have a limit. prove that the series (1/n) doesnt go to 1. use the definiton of lim: for every epsilon>0......
*November 12, 2014*

**AP Calculus**

Are infinite discontinuities removable? Also, please help me with this question: f(x)=x^2+4x+3 / x^2-9 has one removable discontinuity and one vertical asymptote. Find and identify the x-value for each. I found the asymptote at x=3, but please help for the discontinuity. Thanks!
*October 28, 2014*

**us history**

how does American colonization effect the society of the united states
*September 18, 2014*

**physics**

Part 1/2 A cyclist maintains a constant velocity of 7 m/s headed away from point A. At the.aome.initial time, the cyclist is 240 m from the point A. What will be his displacement from starting point after 65 s ? Answer in units m Part 2/2 Qhat will be his position from point A...
*September 13, 2014*

**physics**

A blue ball is thrown upward with an initial speed of 22.8 m/s, from a height of 0.8 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 10.9 m/s from a height of 29.3 meters above the ground. The force of ...
*September 8, 2014*

**FINANCE**

how long would it take an investment to halve in value if it depreciates at a rate of 12,5% per annum on a straight line method?
*September 3, 2014*

**Geometry**

Thank you very much Steve.
*June 11, 2014*

**Geometry**

a four sided garden plot has an irregular shape. the second side is 12 feet longer than the first. the third side is 24 feet longer than the second. the fourth side is 36 feet longer than the third. if the perimeter of the plot measures 136 feet, what is the length of the ...
*June 11, 2014*

**Math**

Assume that it costs Apple approximately C(x) = 36,100 + 100x + 0.01x^2 dollars to manufacture x 30-gigabyte video iPods in a day. How many iPods should be manufactured in order to minimize average cost? What is the resulting average cost of an iPod? (Give your answer to the ...
*June 4, 2014*

**Math**

Wow thank you so much!!!!
*June 4, 2014*

**Math**

Solve the optimization problem. Minimize F = x^2 + y^2 with x + 2y = 15. Thank You for the help!!
*June 4, 2014*

**Math - Business Calc.**

Ahhh okay my bad. Thank you!!!
*June 4, 2014*

**Math - Business Calc.**

Damon, thank you! But i tried entering it in but it said it was wrong. Also it wants the answer in inches cubed (in^3)
*June 4, 2014*

**Math - Business Calc. **

Chocolate Box Company is going to make open-topped boxes out of 5 × 17-inch rectangles of cardboard by cutting squares out of the corners and folding up the sides. What is the largest volume box it can make this way? (Round your answer to the nearest tenth.) Thank You ...
*June 4, 2014*

**math help plzzz!!!!!!!!!**

-8<1-3(x-2)<13
*May 28, 2014*

**math help plzzz**

Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)
*May 27, 2014*

**7th grade math**

Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)
*May 27, 2014*

**math**

Jesse collected data on the colors of the coats his classmates wore one day in February. He started a circle graph. Which equation will give the angle measure of the section for black?
*May 19, 2014*

**English**

Bob what do you mean by Evolutionary mutation? Can you explain that a but more please.
*May 6, 2014*

**English**

Thanks a lot! my mind opened up more for this topic, i can see the light.
*May 6, 2014*

**English**

What is your opinion of the idea that the dangers we face may lie beyond our understanding? I just need some idea's, please help me out. I'm not that good at writing essays.
*May 6, 2014*

**Algebra**

Please help. f(x) -6x-1 and g(x)=4x^2 Select the solution for(f+g)(x). Thank you.
*April 5, 2014*

**Please help!**

Hi, I really need help with this one. Determine the equation of g(x) that results from translating the function f(x) = x^2 + 3 upward 12 units Thank you.
*April 5, 2014*

**Algebra**

Hello, This one as well. Thank you! Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x^2 + 3x + 9.
*March 23, 2014*

**Algebra**

Hello, I hope all is well. I am hoping you can help. Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -7x^2 + 6x + 3.
*March 23, 2014*

**math**

Karen and Wayne need to buy a refrigerator because theirs just broke. Unfortunately, their savings account is depleted, and they will need to borrow money in order to buy a new one. Sears offers them an installment loan at 13% (add-on rate). If the refrigerator at Sears costs...
*February 22, 2014*

**chemistry**

was the formation of reactants or products favored by the addition of heat?
*February 18, 2014*

**math**

how do I multiply 53.33 100
*January 28, 2014*

**stat**

couple plans to have four children what is the probability that three are girls and one is a boy
*January 26, 2014*

**math**

elizabert has a box of shirts.1/2 of the shirts are small,2/5of the shirts are medium, and 5 shirts are large. how many shirts are in box?
*January 23, 2014*

**Math**

a man has a roll of 200m copper wire, he wires on room using 17m, and the next room using 83m of copper wire. How many meters is left on the roll after he does the two rooms?
*January 10, 2014*

**math**

is any multiple of 8 an even number or not
*January 9, 2014*

**Computer Science**

Given an undirected graph G = (V,E), does there exist a set D ⊆ V of size k such that every v ∈ V is either in D or adjacent to at least one member of D. Show that DS∈NPC. You may only assume that VC is known to be NP-Complete.
*December 4, 2013*

**Physics**

Tom the cat is chasing Jerry the mouse across a table surface 2.4 m oﬀ the ﬂoor. Jerry steps out of the way at the last second, and Tom slides oﬀ the edge of the table at a speed of 4.8 m/s. Where will Tom strike the ﬂoor? The acceleration of ...
*November 10, 2013*

**Computer Science**

Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is -1 if a < 0. cor(X,Y) = cov(X,V)/ sqrt(var(X)*var(Y))
*October 28, 2013*

**Computer Science**

Anyone?
*October 25, 2013*

**Computer Science**

cor(X,Y) = cov(X,V) / sqrt(var(X)* var(Y))
*October 25, 2013*

**Computer Science**

CORRECTION: Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is -1 if a < 0.
*October 25, 2013*

**Computer Science**

Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is 1 if a < 0.
*October 25, 2013*

**Math**

Fred decides that 12+40=62 is NOT a true equation.Is Fred correct?Explain.
*October 2, 2013*

**5th grade math**

if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left?
*September 30, 2013*

**Math**

How would you use a number line to round 148 to the nearest ten.Explain.
*September 29, 2013*

**Math**

The base length, the screen height and the screen diagonal form a right-angle triangle. Therefore, you can use pythagorean theorem to calculate screen height: sqrt(40**2 - 32**2) = 24.0 Then surface is length by height: 32 * 24 = 768
*September 28, 2013*

**Trigonometry**

Solve the equation cos^2A = sin^2A + sinA when 0¨¬¡ÂA¡Â360¨¬. Select all the solutions from the list below. A. 330 degrees B. 270 degrees C. 150 degrees D. 30 degrees
*September 12, 2013*

**math**

The perimeter of a fence is 84 meters. If the width is 2 meters less than the length, find the width
*July 19, 2013*

**math stats**

Calculate p ̅. x1 20 n1 50 x2 55 n2 100
*June 22, 2013*

**math stats**

Set up the null and alternative hypothesis for the following problem. A survey reported the planning habits of men and women. The question asked, "how do you primarily keep track of meetings, appointments and deadlines?" 56% of men and 46% of women answered, "in...
*June 22, 2013*

**statistics**

What is your conclusion based on the following data? A survey was conducted to study the effects of weight loss from a low fat diet. Two random samples of 100 people each were selected. One group was put on the low fat diet and the other group on the regular diet. The weight ...
*June 22, 2013*

**statistics**

Set up the null and alternative hypothesis for the following problem. A survey reported the planning habits of men and women. The question asked, "how do you primarily keep track of meetings, appointments and deadlines?" 56% of men and 46% of women answered, "in...
*June 22, 2013*

**statistics**

Calculate p ̅. x1 20 n1 50 x2 55 n2 100
*June 22, 2013*

**statistics**

A store manager claims that the average age of his customers is less than 40 years old, while the industry average is 40 years old. He asks you to test his thinking. You collect a sample of 50 customers and found that the average age is 38.7. Assuming that the population ...
*June 22, 2013*

**statistics**

How is the P-value used to determine whether or not to reject the null hypothesis?
*June 22, 2013*

**computer**

how to download C language? give any website for downloading C language.
*June 11, 2013*

**math**

how to find 2 fracture each third
*May 16, 2013*

**math**

A conical funnel has a base diameter of 4 cm and a height of 5 cm
*May 1, 2013*

**Chemistry**

What are the Six possible ratios for the equation for the formation of potassium chloride?
*April 21, 2013*

**Chemistry**

What are the Six possible ratios for the equation for the formation of potassium chloride?
*April 21, 2013*

**world history**

7. In the eleventh century, who did the Muslims refer to as "the army of God?"
*April 16, 2013*

**stastics**

For each of the following confidence intervals, indicate how much of the distribution would be placed in the cutoff region for a two-tailed test from 80%, 85% and 99%
*April 8, 2013*

**Chemistry**

For the following reaction at a certain temperature: 2( ) 2( ) ( ) 2 H F HF g g g + it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2]=0.0500 M, [F2]=0.0100 M, and [HF]=0.400 M. If 0.200 mol F2 is added to this equilibrium mixture, ...
*April 3, 2013*

**human resources**

What training and development programs help companies the most in a struggling economy?
*February 16, 2013*

**math**

Jim spoke on the phone with all his friends last weekend.On Saturday he spoke for 3/8 of an hour and on Sunday he spoke for half an hour. During that time spent, he spoke to liam for 1/8 of an hour .What fraction of the time Jim spent talking with his friends did he spend ...
*January 13, 2013*

**Science**

Is it incorrect to use g/ml as the unit for the density of a solid object? I thought g/ml and g/cc were the same.
*December 13, 2012*

**Science**

If an object with a density of 0.8 g/cc is placed in pure water is it correct that 80% of the object will be below the water line and 20% of the object will be above the water line?
*December 13, 2012*

**Finance**

++__
*December 3, 2012*

**chem**

combination reaction. mg2+o2
*November 17, 2012*

**Statistics**

start with X=100 and add four x values to make a samle of 5 data such that the standard deviation of these data equals 0
*November 16, 2012*

**arithmetic**

does -9 + 2 equal 2 + (-9)?justify your answer.
*November 14, 2012*

**Prove or Disprove**

Cos(X+y)cos(x-y)= cos^2theta - sin^2theta I foiled the left side as a start because I can kind of see sin^2+cos^2=1 but I can't finish.
*November 13, 2012*

**Prove or disprove?**

cos(X+pi/6) + sin(x-pi/3) = 0 I am working with one side but I am not sure if I can subtract at all here.
*November 13, 2012*

**Trig Identity**

Prove or disprove the following identity sin^4theta - cos^4theta = sin^2theta-cose^2theta
*November 13, 2012*

**math**

If a bar code contains a letter followed by a digit from 1 to 9 followed by another letter how many different codes are possible?
*October 23, 2012*

**calculus**

What is the degree 5 coefficient of the polynomial p(x)= x^2 (x+1) (x+3x^3 + 4x^4)?
*October 22, 2012*

**Calculus II**

A spherical tank with radius of 5 feet is set on a coloumn 15 feet above the ground. How much work is required to fill the tank with water if the solution is pumped from ground level?
*October 10, 2012*

**Science**

What does sleep do for the body?
*October 9, 2012*

**Science**

My choices are evaporation and condesenation
*October 9, 2012*

**Science**

Large deposits of salt get into lakes in Utah due to what?
*October 9, 2012*

**Math**

Thanks!
*October 9, 2012*

**Calculus 3**

A medieval city has the shape of a square and is protected by walls with length 550 m and height 16 m. You are the commander of an attacking army and the closest you can get to the wall is 100 m. Your plan is to set fire to the city by catapulting heated rocks over the wall (...
*October 7, 2012*

**calculus**

Rewrite 2sqrt(x) - (1/x) into exponents of x (eg x^2), and then take the derivative of each part of the equation.
*October 7, 2012*

**english**

thank you
*September 24, 2012*

**english**

Which of the following choices best describes the error in this sentesce? The man is a scientist with a keen sence of observation and who dedicates long hours in the lab. A Misplaced modifier B Fragment C Dangling modifier D Uneven parallelism I chose D
*September 24, 2012*

**english**

thank you
*September 23, 2012*

**english**

Which of the following is a fragment? A. The dancer floated across the stage. B. The truth can be unpleasant. C. The canoe withe the blue ropes. D. The rams locked horns, and the tourists watched them from far away. I chose C
*September 23, 2012*

**English**

thank you
*September 23, 2012*

**English**

Each one of the following sentesces contains a cluase.In which sentence is the clause used as an adverb? A. I do not mind fishing, as long as I don't have to bait the hook. B. All of the delegated who have actual opinions should keep silent. C. What you really need is a ...
*September 23, 2012*

**Chemistry**

A 150g potato cools from 100 degrees Celsius to 50 degrees Celsius. If the specific heat capacity of the potato is 2000 j/kg degrees Celsius, how much heat does the potato lose?
*September 18, 2012*

**English**

thank you very much
*September 18, 2012*

**English**

after doing some more reading and looking at some of these web pages u sent i think the answer is A
*September 18, 2012*

**English**

Select the sentence in which all pronouns are used correctly. A. I sat between him and her during the sales conference. B. Just between you and I, I am not impressed by our new manager. C. Be sure to divide all income from the suburban property between he and I. D. I hope shee...
*September 18, 2012*

**Physics**

Im sorry but what is the equation to use t in? Im confused by your wording.
*September 13, 2012*

**Physics**

From the edge of the rooftop of a building, a boy throws a stone at an angle 20.0° above the horizontal. The stone hits the ground 4.60 s later, 104 m away from the base of the building. (Ignore air resistance.) What is the maximum height H reached by the stone? (I found ...
*September 13, 2012*

**Physics**

With your equation, my vertical and horizontal answers are correct, however the equation for T is wrong. Any other suggestions?
*September 13, 2012*

**english**

In the following sentence, what is the subject complement? My neighbor is a newspaper reporter.
*September 12, 2012*

**Finance **

On January 1, 2011 you bought a two-year U.S. government bond with a principal (face value) of $1000 and a coupon rate of 6% with coupons paid on December 31, 2011 and December 31, 2012. The principal will be repaid on December 31, 2012. The Consumer Price Index (CPI) was 120 ...
*September 12, 2012*

**chemistry**

What mass in kilograms of E85(d = 0.758g/mL) can be contained in a 11.5gal tank?
*September 8, 2012*