Tuesday

January 27, 2015

January 27, 2015

**Recent Homework Questions About First Aid**

Post a New Question | Current Questions

**Linear Algebra**

A hospital performs 3 types of operations. The first type takes 30 minutes, and they charge $500 for it. The second type takes 1 hour, and they charge $750 for it. The third operation takes 2 hours, and they charge $1000 for it. The hospital can schedule up to 30 total ...
*Monday, December 8, 2014 at 2:05pm*

**physics**

Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 400 N, is applied at an angle α = 32° to the forward dashed line. The second force, F2 = 536 N, is applied at an angle β = 10° to the forward dashed line. (a...
*Monday, December 8, 2014 at 7:29am*

**English**

1. When you telephone from abroad, you should dial 096 first. 2. When you are telephone from abroad, you should dial 096 first. 3. Telephoning from abroad, you should dial 096 first. 4. Telephoned from abroad, you should dial 096 first. ------------------ Which ones are ...
*Monday, December 8, 2014 at 4:35am*

**problem solving**

A nine-digit number is formed using each of the digits 1,2,3,...,9 exactly once. For n = 1,2,3,...,9, n divides the first n digits of the number. Find the number.
*Monday, December 8, 2014 at 2:08am*

**math**

Compute Mary's estimated tax payment for the first quarter. She is self-employed and she expects to earn $61,440 this year. Her estimated income tax rate is 22%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare tax is 2.9% of ...
*Sunday, December 7, 2014 at 10:47pm*

**Algebra**

The table below shows the opening value of a stock on the first day of trading in various years. Write a 4th degree model for the data and use the model to estimate the value on the first day of trading in 2010. (1994,2814) (1996,3603) (1998,5429) (2000,3962) (2001,4117) (2004...
*Sunday, December 7, 2014 at 10:12pm*

**calculus**

First, the bond pays 96 + 7 t per year for 10 years. Second, the interest rate is 5.25% compounded continuously. Round your answer to the nearest cent. Find the present value?
*Sunday, December 7, 2014 at 10:11pm*

**Business Mathmatics **

Fandango Furniture Manufacturing, Inc., has 40 employees on the assembly line, each with gross earnings of $325 per week. a. What are the total social security and Medicare taxes that should be withheld from the employees' paychecks each week? Social security: $806 ...
*Sunday, December 7, 2014 at 9:45pm*

**accounting**

Amazon Appliance Company has three installers. Larry earns $355 per week, Curly earns $460 per week, and Moe earns $585 per week. The company's SUTA rate is 5.4%, and the FUTA rate is 6.2% minus the SUTA. As usual, these taxes are paid on the first $7,000 of each employee...
*Sunday, December 7, 2014 at 9:42pm*

**math**

Two trains are on the same track a distance 100 km apart heading towards one another, each at a speed of 50 km/h. A fly starting out at the front of one train, flies towards the other at a speed of 75 km/h. Upon reaching the other train, the fly turns around and continues ...
*Sunday, December 7, 2014 at 9:00pm*

**Algebra**

The table below shows the opening value of a stock on the first day of trading in various years. Write a 4th degree model for the data and use the model to estimate the value on the first day of trading in 2010. (1994,2814) (1996,3603) (1998,5429) (2000,3962) (2001,4117) (2004...
*Sunday, December 7, 2014 at 6:23pm*

**English**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Sunday, December 7, 2014 at 6:22pm*

**calc**

If D is the solid region in the first octant bounded above by the paraboloid z = 1 − x2 − y2 and below by the xy-plane, the volume of D is: so i set this up integrating over dz dr dtheta and got pi/2 but the answer i spi/8
*Sunday, December 7, 2014 at 3:51pm*

**Calc I**

if f(t)=sqrt(4t+1) find f''(2) I got the first derivative to be: 1/2(4t-1)^-1/2 * 4t^3 and i'm trying to figure out if i need the product rule again to find the second derivative -1t^3(4t-1)^-3/2 * 4t^3 The answer if -4/27 and I'm not sure how to get that if I...
*Sunday, December 7, 2014 at 3:41pm*

**Psychology**

Hello, I am in need of help with a psychology question. Here is the information that was provided: Psychologists use field observations, laboratory experiments, and other methods to gather data relevant to their research questions. When sufficient data have been collected, the...
*Sunday, December 7, 2014 at 2:45pm*

**Chemestry**

To fnd the empirical formula i have to convert the percent in g first, or a take the date in percent?
*Sunday, December 7, 2014 at 11:43am*

**social studies**

1. which of the following staments would describe a reason why the confederation government was unable to help georgia solve its problems with the indians? it was too busy fighting foreign wars. the president would veto any action it took. it was a week system of government in...
*Sunday, December 7, 2014 at 11:15am*

**physics**

Define Newton's first law .
*Sunday, December 7, 2014 at 8:40am*

**physics**

Newton first law provides the measure of ???
*Sunday, December 7, 2014 at 8:37am*

**problem solving**

a nine digit number is formed using each of the digit 1,2,3,...,9 exactly once. for n= 1,2,3,...,9,n divides the first n digits of the number. find the number.
*Sunday, December 7, 2014 at 2:28am*

**Psychology**

Hello, I am in need of help with a psychology question. Here is the information that was provided: Psychologists use field observations, laboratory experiments, and other methods to gather data relevant to their research questions. When sufficient data have been collected, the...
*Sunday, December 7, 2014 at 12:35am*

**Language Arts Help!**

Read the folowing sentences from the novel. From which point of view are the sentences written? It was past dawn when he woke, his feeling of contentment stll in him. He was no longer his own problem by Merchent Lyte's. Tomorrow at this time what would he be calling him? &...
*Saturday, December 6, 2014 at 10:02pm*

**chemistry**

What mass of carbon dioxide will be produced when 0.250 mol of propane(C3H8) reacts with 25.0 g of oxygen? Write a balanced equation first.
*Saturday, December 6, 2014 at 9:43pm*

**Math help **

each time old faithful in Yellowstone national park erupts, rangers can estimate the height of the geyser by comparing it to the height of a tree. first the Rangers locate a tree of the same height . the shadow of the tree is 93 feet at the same time that the shadow of a 6ft ...
*Saturday, December 6, 2014 at 5:19pm*

**programming urgent**

so i have two arrays . I need to figure outh how to multiply each value of the first array by each value in the second array. how doy ou do thtisT? thanks
*Saturday, December 6, 2014 at 5:14pm*

**Physics**

Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 400 N, is applied at an angle α = 32° to the forward dashed line. The second force, F2 = 536 N, is applied at an angle β = 10° to the forward dashed line. (a...
*Saturday, December 6, 2014 at 4:06pm*

**Math**

10x+5y=500 What is the slope? Do I have to change it to slope intercept form first? Or is there a way to find slope with keeping that equation
*Saturday, December 6, 2014 at 1:37pm*

**Physics**

A student uses a 2.00-m-long steel string with a diameter of 0.90 mm for a standing wave experiment. The tension on the string is tweaked so that the second harmonic of this string vibrates at 22.0Hz . (ρsteel=7.8⋅103 kg/m3) If you wanted to increase the first ...
*Saturday, December 6, 2014 at 12:46pm*

**math**

Lindsay's estimated tax payment for the first quarter. She is self-employed and she expects to earn $78,080 this year. Her estimated income tax rate is 24%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare tax is 2.9% of all ...
*Saturday, December 6, 2014 at 10:46am*

**Math**

Q. As a project,the fifth grade students at Scott Elementary School collected newspaper to recycle. During the first week, they collected 212 pounds of newspapers. For each of the next four weeks,they doubled the previous week's amount of the newspaper collected. What was ...
*Friday, December 5, 2014 at 9:22pm*

**English help please**

1. Which of the following passages from the text identifies a key event in the plot? A. "... I'll buy your unexpired time. I think between us we could make some fine things- you and I." The boy flushed. To think the great Paul Revere wanted him... B. His feet ...
*Friday, December 5, 2014 at 7:38pm*

**Math please check**

I know the answer to the first one is "e" and the answer to the second one is "a "but I have no idea why please explain how to do these two problems. I am very confused with this new method. Thank you! The “Cobb-Douglas” productivity function for ...
*Friday, December 5, 2014 at 3:19pm*

**Calculous (Finding Zeros!)**

y = (x^2+2x-5) (x^3+3x^2-40x) Find the zeros ( 5 total zeros ) x = x = x = x = x = So would it be easier for me to distribute first then factor the whole mess out to find the x-intercepts that are the zeroes?. Or. factor (x^2+2x-5) and (x^3+3x^2-40x) and find the zeroes?
*Friday, December 5, 2014 at 2:09pm*

**Calculus Please Help**

Can you please explain these two questions to me? Suppose the population size of a predator is given by P (x) = 0.006x2 + 0.005x, where x represents the population of its prey. If the population of the prey is 10,000 at the first of January and is reduced to 6,000 by May 1 of ...
*Friday, December 5, 2014 at 12:41pm*

**Catering**

6. At a party, it's sometimes permissible for serving personnel to A. smoke, provided they don't do so in view of the guests. B. become part of the party if they know some of the guests. C. take home any leftovers that remain. D. sample the buffet items before the ...
*Friday, December 5, 2014 at 12:27pm*

**programming**

Hi, please help me with this question. Write a program to assign passengers seats on a train journey that travels from Paris to London. Assume the train consists of (78 seats distributed amongst different classes) with the following specifications: 3 classes, 13 rows and 6 ...
*Friday, December 5, 2014 at 10:57am*

**business finance**

Your client is 40 years old, and she wants to begin saving for retirement, with the first payment to come one year from now. She can save RM5,000 per year, and you advise her to invest it in the stock market, which you expect to provide an average return of 9 percent in the ...
*Friday, December 5, 2014 at 4:24am*

**Quantitative Business Analysis**

John runs a florist shop in a small Arkansas town and had to borrow $170,000 to start up the shop. He was able to borrow some from the state business development office at 4% but the rest he had to borrow from a "friend" who charged him 8%. The first year John paid $...
*Friday, December 5, 2014 at 3:23am*

**Quantitative Business Analysis**

John runs a florist shop in a small arkansas town and had to borrow $170,000 to start up the shop. He was able to borrow some from the state business development office at 4% but the rest he had to borrow from a friend who charged him 8%. The first year John paid $9800 in ...
*Friday, December 5, 2014 at 3:18am*

**Math**

John runs a florist shop in a small arkansas town and had to borrow $170,000 to start up the shop. He was able to borrow some from the state business development office at 4% but the rest he had to borrow from a friend who charged him 8%. The first year John paid $9800 in ...
*Friday, December 5, 2014 at 3:00am*

**Calculus question please explain**

I know the answer to the first one is "e" and the answer to the second one is "a "but I have no idea why please explain how to do these two problems. I am very confused with this method. Thank you! The “Cobb-Douglas” productivity function for a ...
*Friday, December 5, 2014 at 1:36am*

**Algebra **

(-5a^2 / b^3)^-1. For a = -4. B= 2 I know you plug in the numbers for a and b but don't know what to do after this is my first time trying a problem like this .
*Thursday, December 4, 2014 at 11:10pm*

**algebra 1**

A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide? My teacher explained how to set up the problem: 3x+5y=84 x+y=200 what I dont get is why ...
*Thursday, December 4, 2014 at 10:46pm*

**Math**

A taxi charges $1.00 for the first mile and $.20 for an additional 1/6 of a mile. How far can you travel for $5.00.
*Thursday, December 4, 2014 at 8:07pm*

**Child Development **

1) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. ￼B. time sampling. C. event sampling. D. checklist. 2) One way a teacher can help a child stand up for her rights is A. making other ...
*Thursday, December 4, 2014 at 7:57pm*

**s.s**

Before the battle of Trenton, why did many patriot leader leaders want to make their enemy attack first rather than attacking first... A) their actions could then be justified B) Their supplies would last longer C) They could make a quicker retreat. is it A
*Thursday, December 4, 2014 at 5:35pm*

** S.S 6th grade american revolution**

As a result of the first Continental Congress.. A) Colonists agreed to obey most of Britain's rule B) the declaration of right was created. C) king George agreed to go along with most of the colonist demand I think it letter b
*Thursday, December 4, 2014 at 3:58pm*

**social studies help as soon as possible**

3. which of the following does not describe part of the intolerable acts? boston's port was closed there was a tax on molasses there were limited town meetings colonists had to quarter british i think this choice c soldiers in their homes. 4. which of the following was not...
*Thursday, December 4, 2014 at 2:00pm*

**Math**

My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can someone help me with ...
*Thursday, December 4, 2014 at 1:06pm*

**social studies**

1. which of the colonies was not a response of the colonies to the tea act?. a tea ships were sent back to britian in protest b the tea was confiscated and sold later c crates of tea were dumped into the water d colonists made a profit because of the monopoly by britian i ...
*Thursday, December 4, 2014 at 12:44pm*

**accounts**

Diane Gobin is the founder and manager of Gobin's World. Diane has approached the local bank for a loan to expand her business. As part of the loan application, Diane was asked to prepare Financial Statements for the business. She prepared the following balance sheet and ...
*Thursday, December 4, 2014 at 7:54am*

**Improving Writing- REVISED VERSION**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Thursday, December 4, 2014 at 4:14am*

**math**

Find the area of the region in the first quadrant that is below the parametric curve? the parametric curves are x = t^3 + 6t y = 4t - t^2 any help would be greatly appreciated. Thanks!
*Wednesday, December 3, 2014 at 10:15pm*

**Math **

The square root of h is greater than 10/3 and less than 24/5. How many integer values of h satisfy this condition? I think the first step would be to square each fraction so 100/9 and 576/25 and then see which whole numbers are between. Am I on the right track?
*Wednesday, December 3, 2014 at 10:09pm*

**Finance**

A manufacturing company is thinking of launching a new product. The company expects to sell $950,000 of the new product in the first year and $1,500,000 each year thereafter. Direct costs including labor and materials will be 45% of sales. Indirect incremental costs are ...
*Wednesday, December 3, 2014 at 7:06pm*

**Pre-Calc/Trig...**

The nth term of a geometric sequence is given by an = 1/4(4)^n-1. Write the first five terms of this sequence.
*Wednesday, December 3, 2014 at 12:10pm*

**English**

Which of the following sentences uses the word skeptically correctly? a.)The teacher was trusted by her students, and as a result, they learned their lessons skeptically. b.)I was confident I’d gotten every question right and handed in my test skeptically. c.)Seeing the ...
*Wednesday, December 3, 2014 at 11:52am*

**Improving writing **

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Wednesday, December 3, 2014 at 8:26am*

**ENGLISH**

Love is a surgeon Love can cut into your flesh like a scalpel Love can operate upon your heart Love can circumcise you Perhaps you don't believe it But i know. Love operates Upon your skin, your hair, your gait For Love there is no remedy Except the surgeon's scalpel...
*Wednesday, December 3, 2014 at 4:48am*

**math**

help: Two travelers start simultaneously in two cities A and B, and go to meet each other. The part of A walk 1 km on the first day , the second day 2 km , 3 km on the third day , and so on. The part of B walk 20 miles the first day, the second day 18 km , 16 km on the third ...
*Tuesday, December 2, 2014 at 9:57pm*

**calculus 2**

Find all points of intersection of the given curves. (Assume 0 ≤ θ ≤ 2π. Order your answers from smallest to largest θ. If an intersection occurs at the pole, enter POLE in the first answer blank.) r = 1 − cos θ, r = 1 + sin θ
*Tuesday, December 2, 2014 at 8:32pm*

**Chemistry**

For which of these elements would the first ionization energy of the atom be higher than that of the diatomic molecule? helium oxygen carbon lithium Please explain why and thanks
*Tuesday, December 2, 2014 at 6:22pm*

**precal Arithmetic progression**

The fifth term of an arithmetic series is 12 and the eighth term is 3. Find the sum of the first 6 terms and also of the first 11 terms. T5=a+4d=12 T8=a+7d=3 -3d=9 d=-3
*Tuesday, December 2, 2014 at 1:18pm*

**English**

“Well that’s sculpture, making a ’74 Toyota look like a ’63 Corvette, only I didn’t think of it that way... I was doing good work, and I was making good money. A. to prepare the reader for a change in topic. B. to show Ramirez’s pride in ...
*Tuesday, December 2, 2014 at 10:56am*

**language arts**

When Louise Meyer was five years old, her mother took her to a science museum. That day, young Louise encountered her first snakes, and she's been fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to ...
*Tuesday, December 2, 2014 at 12:23am*

**language arts **

Avalanches happen in a series of stages. First, while the temperature is cold and there is a heavy snowfall, the snow will stick to the ground. Suppose that what happens next is that the air temperature changes after the snow has fallen. Then, a layer of the snow may weaken. ...
*Monday, December 1, 2014 at 10:53pm*

**American History**

1. Reagan embraced the idea that through tax incentives the private sector would shift its resources from tax shelters to productive investment. This theory is referred to as A. supply-and-demand economics. B. neofederalism. C. deficit economics. D. supply-side economics. 2. ...
*Monday, December 1, 2014 at 10:11pm*

**Chemistry**

An electron is excited from the n=1 ground state to the n=3 state in a hydrogen atom. Which of the following statements are true? Correct the false statements to make them true. A. It takes more energy to ionize (completely remove) the electron from n=3 than from the ground ...
*Monday, December 1, 2014 at 10:00pm*

**Language Arts**

Suppose this selection is an excerpt from a biography. Which of the following changes would make it fiction rather than nonfiction? A. Transforming it into a first-person account by Louise B. Transforming it into a dialogue between Louise and a snake C. Transfroming it into a ...
*Monday, December 1, 2014 at 9:11pm*

**mathematics**

In an ap d sum of d 1st ten terms is 50 nd d fifth term is 3times the 2nd term.find the first nd d sum of d 1st 20 terms
*Monday, December 1, 2014 at 8:53pm*

**Language Arts**

When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools...
*Monday, December 1, 2014 at 8:51pm*

**Language Arts**

When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools...
*Monday, December 1, 2014 at 8:37pm*

**government**

What is the tripartite view of political parties? Has this model become outdated? If so, why? i got the first part the second part id
*Monday, December 1, 2014 at 8:15pm*

**math**

Q. As a project,the fifth grade students at Scott Elementary School collected newspapers to recycle. During the first week,they collected 212 pounds of newspapers. For each of the next four weeks,they doubled the previous week's amount of newspaper collected. What 6th was ...
*Monday, December 1, 2014 at 7:18pm*

**Language Arts**

Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snowsticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanch happens when the gravity of snow ...
*Monday, December 1, 2014 at 6:15pm*

**Language Arts**

Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snowsticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanch happens when the gravity of snow ...
*Monday, December 1, 2014 at 5:58pm*

**Language Arts**

Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snowsticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanch happens when the gravity of snow ...
*Monday, December 1, 2014 at 5:54pm*

**Language Arts**

Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snowsticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanch happens when the gravity of snow ...
*Monday, December 1, 2014 at 5:46pm*

**Science IPS**

A mass of 10 g of sodium nitrate is dissolved in 10cm3 of water at 80 degrees (c). As the solution is cooled, at what temperature will a precipitate first appear?
*Monday, December 1, 2014 at 5:22pm*

**Math**

What is the first step in solving the equation? 3/4 divided by 2/3 Is the answer multiply
*Monday, December 1, 2014 at 5:22pm*

**english **

Whenever Richard Cory went down town, We people on the pavement looked at him: He was a gentleman from sole to crown, Clean favored, and imperially slim. And he was always quietly arrayed, 5 And he was always human when he talked; But still he fluttered pulses when he said, &...
*Monday, December 1, 2014 at 11:48am*

**english**

The night has a thousand eyes, And the day but one; Yet the light of the bright world dies With the dying sun. The mind has a thousand eyes, 5 And the heart but one: Yet the light of a whole life dies When love is done. The Rhyme Scheme of the first 4 lines of this poem is: (...
*Monday, December 1, 2014 at 11:33am*

**corrections**

The 1910 case of weems v. United states was unique in what respect? a. it was the first time the Supreme court invalidated an excessive penalty. b. it was the only time the supreme court held that no penalty is excessive if evenly applied. c. it was the first time the supreme ...
*Monday, December 1, 2014 at 10:42am*

**Policing**

The due process model of criminal justice asserts all of the following except: a. the gov. job is to maximize freedom and opportunities for all citizens which included protecting people from undue gov. influence b. all suspects are innocent until proven guilty c. the due ...
*Monday, December 1, 2014 at 9:34am*

**Maths**

The nth term of a series is 2^n-1 +5n. Find the sum of the first n terms. (Hint: This is an expression in terms of n).
*Monday, December 1, 2014 at 6:49am*

**Maths**

The first term of an AP is 12 and that of a GP is 6. The common difference and the common ratio are equal, so as are the sum of the fist 3 terms. Find the possible values of the common difference?
*Monday, December 1, 2014 at 6:07am*

**band essay-Ms. Sue**

Who wouldn’t want the chance to go to Puerto Rico? I have been excited for this band trip opportunity since it was introduced last winter. A once in a lifetime opportunity to share my love of music and explore another culture is an eyeopening experience! I believe I am a ...
*Monday, December 1, 2014 at 12:08am*

**English (Reunion by John Cheever)**

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does Charlie accept ...
*Sunday, November 30, 2014 at 10:33pm*

**Chemistry**

Bromine has two naturally occurring isotopes, the first of which is 79Br with a mass of 78.904 amu and an abundance of 50.54%. Calculate the mass of the other isotope.
*Sunday, November 30, 2014 at 8:12pm*

**English (Urgent)**

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does Charlie accept ...
*Sunday, November 30, 2014 at 8:07pm*

**@Vanessa: Re: Comm/215**

I deleted your original questions and answers. Here are my responses. Comm/215 - Ms. Sue, Sunday, November 30, 2014 at 4:45pm I've checked the first 10 and they are all right. Is # 11 a comma splice? If I have time, I'll come back and check more of your answers. Comm/...
*Sunday, November 30, 2014 at 7:49pm*

**English**

1. I heard the news at first hand. 2. I heard the news at second hand. 1-1. I heard the news directly. 2-2. I heard the news indirectly. --------------- Are they interchangeable? What is the meaning of 'hand' in the sentences?
*Sunday, November 30, 2014 at 7:37pm*

**Math Stats**

The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. 52, 30, 44, 35, 47, 37, 56, 26, 35, 35, 52, 52 __________________________________________________________________________ Construct a 95% confidence interval for...
*Sunday, November 30, 2014 at 7:26pm*

**CALC 1**

Suppose that h is a function with h'(x) = xe^x. Find all intervals where the function h is concave up. Now, I understand that concavity is determined by the second derivative, so what my question here is, is it just taking the first derivative and then taking it again? Is ...
*Sunday, November 30, 2014 at 1:57pm*

**physics PLEASE HELP **

An air column open at one end only is increased in length. The air column first resonates with a given turning fork when the length of the air column reaches 20 cm. The next two consecutive lengths that will resonate with the same tuning fork will measure.
*Saturday, November 29, 2014 at 4:22pm*

**Maths**

Hi everyone. I've been struggling with the following maths question for a while and I'm not sure where I went wrong. 2(3x/5 - 1) = 10 and I need to solve for x I first tried turning everything into fractions over 5 but that gave me the answer of 10/3 which I know is ...
*Saturday, November 29, 2014 at 12:23am*

**Alg !**

What is the sum of the first 4 terms of the arithmetic sequence in which the 6th term is 8 and the 10th term is 13?
*Friday, November 28, 2014 at 11:25am*

**history 911**

1. Which accurately describes the action taken by colonists in response to Parliament’s passage of the Intolerable Acts? A. They held the First Continental Congress. *** B. They formed an emergency government and elected a president. C. They created a continental army led...
*Thursday, November 27, 2014 at 11:42pm*

**algebra**

A goldsmith has two gold alloys. The first alloy is 30% gold; the second alloy is 80% gold. How many grams of each should be mixed to produce 10 grams of an alloy that is 40% gold? amount of 30% gold ___ g amount of 80% gold ___ g
*Thursday, November 27, 2014 at 7:29pm*

**math**

The 3rd term of a geometric progression is nine times the first term.if the second term is one-twenty fourth the 5th term.find the 4th term. solution ar^2=9a r=sqr of 9 r=3.pls help me on how to get the first term(a)
*Thursday, November 27, 2014 at 2:17pm*

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