Tuesday

October 21, 2014

October 21, 2014

Total # Posts: 4,201

**Differential Equations**

Before retirement: dy/dt = .07y+5000 separate and solve: 1/(.07y+5000)dy = dt (1/.07)*ln(.07y+5000) = t+c ln(.07y+5000) = .07t+c .07y+5000 = ce^(.07t) y = [c*e^(.07t)-5000]/.07 plug in y(0)=0 to find c. c=5000 so y = [5000e^(.07t)-5000]/.07 plug in t=30 to get y=511869.27 (...
*March 4, 2014*

**chemistry**

Calculate the mass of nickel(II) sulfate and the mass of water contained in 200. g of a 6.00% solution of nickel(II) sulfate
*March 4, 2014*

**SOCIAL STUDIES**

WHY DO I LOVE SOCIAL STUDIES???????
*March 4, 2014*

**Geometry**

thank you
*March 4, 2014*

**Geometry**

Which of the following is not a postulate used to prove the congruence of two triangles? a. ASA b. SSA c. SAS d. SSS I think its C?
*March 4, 2014*

**Biology**

Which earthworm organ serves excretory function by excreting metabolic waste?
*March 3, 2014*

**Chemistry**

How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol)
*March 2, 2014*

**history **

True or False Rutherford Hayes won a landslide victory in the election of 1876. I'm not sure if this statement is true or false because he lost the election originally but then won in the reelection process
*March 1, 2014*

**history **

Andrew Johnson’s plan for Reconstruction was based on A. his strong belief in Negro suffrage B. his belief that Indians were savages C. a strict adherence to the Constitution; hence, since the former Confederate states had left the Union, great changes had to be made ...
*March 1, 2014*

**Biology**

Conducting cells in xylem are: Sieve tube elements Tracheids Tracheids and vessel elements Vessel elements Tracheids and sieve tube elements please help with my homework thanks.
*February 27, 2014*

**Biology**

Organisms that assemble their own organic molecules from water and elements that they absorb from their environment are which of the following? Is this detritivore or decomposer? I am confused by these two. thanks
*February 27, 2014*

**AED **

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4 African American students, 3 Native American ...
*February 27, 2014*

**Chem 1150**

One tablespoon of peanut butter has a mass of 17g . It is combusted in a calorimeter whose heat capacity is 130kJ/∘C . The temperature of the calorimeter rises from 22.5∘C to 25.3∘C. Find the food caloric content of peanut butter.
*February 25, 2014*

**history (Declaration)**

How do you see the ideas in the Declaration compared to typical Medieval European?
*February 23, 2014*

**Help finding a good speech topic**

I am going to be giving an informative speech on a news article. The news article is suppose to be able to at least somewhat relate to college students and should also be about something new, interesting, or novel. Preferable something I could easily talk about for five ...
*February 19, 2014*

**Math**

If I picked a red checker from a bag of 9 black checkers and 6 red checkers, replacing it, and picking a red checker. What would the probability be of each set???
*February 18, 2014*

**Mathematics **

An rectangular area of 25 square meters, around an ancient historical site, is to be fenced to protect the artifacts. The sides with length x cost $ 34/ m and the other two sides cost $ 26 /m. a. Write an expression for the cost as a function of x. C(x) = b. The value of x for...
*February 17, 2014*

**the doctor**

That's what I had put at first but it marked it wrong. I don't understand.
*February 13, 2014*

**physics**

A)An object at rest has no forces acting on it. B)An object can be moving in one direction while the net force acting on it is in another direction. C)In order to move a massive crate sitting on the floor, the force you apply to the crate has to overcome the force of the crate...
*February 13, 2014*

**math**

Charice is painting the lines for her own basketball court. The free throw section will be a rectangle with a semi-circle on top. The length of the rectangle will be 2.25 metres greater than the width. Using 3.14 for mc004-1.jpg, the area of the court is 31.28 m2. Determine ...
*February 13, 2014*

**math**

A storage tank has a radius of x + 5 metres and a height of x metres. Determine the dimensions of the tank if the volume is 192ð m3? . Round your answers to two decimal places.
*February 13, 2014*

**math**

5/6 + 3/4 = 1/18 - 6c - 2/3 + 7c + 1/9 how do I get the answer?
*February 12, 2014*

**PHYSICS**

A 200g block slides back and forth on a frictionless surface between two springs, as shown. The left-hand spring has k = 130 N/m and its maximum compression is 16cm. The right-hand spring has k = 280 N/m. Find (a) the maximum compression of the right-hand spring and (b) the ...
*February 12, 2014*

**PHYSICS**

A roller coaster powered by a spring launcher follows a frictionless track as shown below. The roller coaster cart has a mass of 500 kg, and the spring launcher has a spring constant of 1500 N/m. d. What is the fastest speed the cart reaches anywhere on the track?
*February 12, 2014*

**physics**

A)Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.60 kg, the heavier box has a mass of 7.65 kg. Calculate the contact force between these boxes when a horizontal force of 4.83 N is applied to the light box. B)Calculate the contact ...
*February 12, 2014*

**PHYSICS**

A roller coaster powered by a spring launcher follows a frictionless track as shown below. The roller coaster cart has a mass of 500 kg, and the spring launcher has a spring constant of 1500 N/m. a. If the cart starts at a height h1 = 10m, how much must the spring be ...
*February 12, 2014*

**math**

The answer is no because pi doesn't have the exact value since it has many decimals, never ending.
*February 11, 2014*

**Algebra 1/ Pre**

Thank you sooo much!
*February 10, 2014*

**Algebra 1/ Pre **

Solve? 5x - 3(7x + 5) = 1
*February 10, 2014*

**Math**

Nevermind I got the answer
*February 10, 2014*

**Math**

We'll, this is the whole problem: Use substitution to solve for x and y: {5x - 3y =1 {7x - y = -5 The answer is suppose to be (-1,-2)
*February 10, 2014*

**Math**

How would you plug it into 5x - 3y = 1 Would it be: 5x - 3(-5 - 7x) = 1?
*February 10, 2014*

**Math**

Rearrange before substitution: 7x - y = -5 Would it be: -y= 5 - 7x?
*February 10, 2014*

**Math- urgent**

If slope= 4;(3,8) what would be the equation in point-slope form? Please show your work.
*February 5, 2014*

**physics**

Consider a swimmer who wants to swim directly across a river as shown in the figure below. If the speed of the current is 0.29 m/s and the swimmer's speed relative to the water is 0.64 m/s, how long will it take her to cross a river that is 14 m wide?
*February 4, 2014*

**Science **

What are Antibiotics?
*February 3, 2014*

**Fast Way to Multiply Numbers ending in 0?**

Is there any trick to quickly multiply numbers ending in 0 - like 280 x 20?
*February 1, 2014*

**Math Ratio**

If 8 pounds of hamburger feeds 5 people for 7 days, how much meat is required to feed 7 people for 8 days?
*January 31, 2014*

**Biology**

During the ______ pathway, a host cell infected with a virus lyses and releases new virus particles. During the _______ pathway, viral DNA replicates along with the cell, but new viruses are not immediately produced. Please help!
*January 30, 2014*

**Biology**

Viroids typically infect plant, while prions typically infect nervous system. Is this correct? thanks!
*January 30, 2014*

**physics**

Four charges −8 × 10^−9 C at (0 m, 0 m), −7 × 10^−9 C at (5 m, 1 m), −1 × 10^−9 C at (−2 m, −3 m), and 2 × 10^−9 C at (−2 m, 4 m), are arranged in the (x, y) plane as shown. Find the magnitude ...
*January 29, 2014*

**Chemistry **

From data below, calculate the total heat (in J) associated with the conversion of 0.265 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.)
*January 29, 2014*

**MATH MATH**

how can you tell if an equal share is more than one whole?
*January 24, 2014*

**American History**

The development of WA state was one of the effects of the fur trade. Explain what the positive and negative effects of WA's development were.
*January 22, 2014*

**science(answer please)**

Number 3 is b.
*January 22, 2014*

**Eng 2**

it's A)
*January 21, 2014*

**Physics**

Attempting to stop on a slippery road, a car initially moving at 80 km/h skids at 30° to its initial motion, stopping in 3.9 s. Determine the average acceleration in m/s2 in coordinates with the x-axis in the direction of the original motion and the y- axis toward the side...
*January 21, 2014*

**Math Ms.Sue Broken Down**

l -(-5)^2 l [( -5) - (-2)] + [(-5)^3 + (-2)] Ms.Sue i broke it down more! Hopefully that helps
*January 20, 2014*

**Math! Ms.Sue Please**

Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
*January 20, 2014*

**Algebra/Math**

Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
*January 20, 2014*

**Algebra/Math**

Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
*January 20, 2014*

**Business-Need help!**

1. Regarding Mexico's Porfirio Díaz, which statement is true? A. He enacted laws that favored wealthy elites. B. He overthrew the Mexican Revolution of 1910. C. He freed many peasant farmers from debt peonage. D. He reformed the hacienda system. 2. In the 1840s, the...
*January 15, 2014*

**Business Management**

In Korea, between 1750 and 1790, the slave population _______ as agricultural productivity increased. A. increased dramatically B. decreased slightly C. increased slightly D. decreased markedly I believe it would be increased dramatically
*January 15, 2014*

**Math help me quicckly**

An arc of length 30 meters is formed by a central angle A on a circle of radius 15. The measure of A in degrees (to two decimal places) is (Points : 5) 0.50 28.65 114.59 0.01
*January 14, 2014*

**TRIG,**

Can you solve and show me the work in these two equations? cos(3x)=-1 tan (theta)=-1
*January 12, 2014*

**SCIENCE HELP PLEASE**

Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
*January 8, 2014*

**Maths**

At 9.30 a.m., a car left town X for town Y at a speed of 60km/h for the whole journey. At 11 a.m., a lorry started from town Y and travelled towards town X. The speed of the lorry remained the same until it passed the car at 12.30 p.m. The lorry passed the car at midpoint ...
*December 30, 2013*

**Art**

Thank you! This was more of a personal question. I couldn't find the answer online. I recently drew a Rubik's cube and was unsure of what paint to use when proceeding to fill the blocks in.
*December 18, 2013*

**Art**

What type of paint out of the following three: 1.) Acrylic Paint 2.) Oil Paint or 3.) Watercolor; would you recommend gives the best glossy/shiny finish?
*December 18, 2013*

**English**

B?sees the mob as cruel and undiscriminating
*December 16, 2013*

**English **

In a typical Hawthorne world of moonbeams and shadows, the greatest pain for the Kinsman is not the tar and feathers, an extremely painful procedure, but making eye contact with the nephew to whom he had portrayed himself as a big shot. Most Americans have been taught to cheer...
*December 16, 2013*

**English (SCARLET LETTER)**

Awesome. thanks!!
*December 16, 2013*

**English (SCARLET LETTER)**

Arthur is Dimmesdale by the way. So you don't get confused. thanks!
*December 16, 2013*

**English (SCARLET LETTER)**

That overview you provided is the third scaffold. But if you have time, can you read the passage below?? The second scaffold scene is directly in the middle of the novel. Dimmesdale is wandering around town at night feeling guilty and tests out the scaffold. What would it be ...
*December 16, 2013*

**English (SCARLET LETTER)**

Or, is it D? confessing everything?? Because it looks like he wants to confess but something is holding him back.
*December 16, 2013*

**English (SCARLET LETTER)**

Yes, I checked here as well. But I just can't seem to get understand the second scaffold scene. I am debating between answer A and C.
*December 16, 2013*

**English (SCARLET LETTER)**

We are reading the story, THE SCARLET LETTER, in class and I am confused on this question. From my understanding, Dimmesdale gets on scaffold and imagine what would be to tell the truth about his sin but then all of the sudden Hester and Pearl walks by. But I don't think ...
*December 16, 2013*

**college chemistry**

If 100.0 mL of 0.0025 M Na2SO4 (aq)is saturated with CaSO4 how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?]
*December 12, 2013*

**Math help,plz :(**

Bob is making a scale drawing of his garage which is 10 yards long.If 1/2 inch represents yard, how many inches long should the drawing be?
*December 12, 2013*

**College Algebra**

The equation for the total revenue earned by a company for selling widgets is p=3q. The equation for the total cost of the company for producing widgets is p=q+4. Identify the break-even quantity.
*December 11, 2013*

**College Algebra**

Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. what is the slope and what does it represent? what is the y-intercept and what does it represent?
*December 11, 2013*

**College Algebra**

Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. Write an equation in slope-intercept form that expresses y in terms of x. slope= -2/5 what does it represent? y-intercept= 4 what does it represent?
*December 11, 2013*

**Science**

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*December 11, 2013*

**Science**

You are creating a carbon cycle poster. In which direction would you draw arrows to show the movement of carbon through the process of respiration?
*December 11, 2013*

**College Algebra**

50 gallon barrel plumb full of water springs a leak in the bottom and leaks at a constant rate of two gallons per minute. y=50-2x slope=-2 what does it represent? y-intercept=50 what does it represent? x-intercept=25 what does it represent?
*December 11, 2013*

**College Algebra**

The letters in the word probability are written on separate slips of paper. Find the probability of drawing two i's in a row without replacement.
*December 11, 2013*

**College Algebra**

The letters in the word probability are written on separate slips of paper. One slip of paper is drawn at random. Find P(b)
*December 11, 2013*

**College Algebra**

Find AC A= 2 3 0 4 1 6 C= 2 3 0 1 1 0
*December 11, 2013*

**College Algebra **

If CI=C, find I C= 2 3 0 1 1 0
*December 11, 2013*

**College Algebra**

Line m passes through (2,5) and (-3,-2). Find the slope of a line that is perpendicular to line m.
*December 11, 2013*

**College Algebra**

They didn't line up correctly. I reposted the correct way.
*December 11, 2013*

**College Algebra**

Find AC A= 2 3 0 C= 2 3 4 1 6 0 1 1 0
*December 11, 2013*

**Math- urgent**

Solve for x. 8x-(8+6x)=20 Please show your work.
*December 10, 2013*

**Math- urgent**

Solve for x. x+4 (x+3) =17 Please show your work.
*December 9, 2013*

**math **

an ice cube that is 8 cm on each side is melting at a rate of 4 cm^3 per min. how fast is the length of the side decreasing?
*December 9, 2013*

**math**

find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
*December 8, 2013*

**math**

how do you do it the way i showed above? because our teacher doesn't want us to use the formula
*December 8, 2013*

**math**

find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
*December 8, 2013*

**Young ScholarsAcademy**

Quention and suani went to ray house of food dinner . their bill was $64 to which they added a 15%tip. how much did they pay in total
*December 3, 2013*

**College Algebra**

A= [2 3 0] [4 1 6] 1. what is the additive inverse of A? 2. find 3A.
*December 3, 2013*

**College Algebra**

Line m passes through (2,5) and (-3,-2) Find the slope of a line that is perpendicular to line m.
*December 3, 2013*

**College Algebra**

Find the probability of drawing two i's in a row without replacement.
*December 3, 2013*

**chemistry**

convert 3.0m to yd
*December 1, 2013*

**Physical Science**

Magnetite
*November 26, 2013*

**Instructions**

The teacher gave us a mini essay that has 16 questions under each chapter (Chapters 1-4, 4 questions per chapter). Her instructions are as follows: "Below you will find short-essay-type questions from each of the Unit 2 chapters. Please select and respond to any ONE ...
*November 26, 2013*

**math(help)**

In order to do fractions, you need to find the common denominator [bottom number]. IF they don't match then you have to multiply both of the numbers to have the same number. For example questions 3 and 4 both have a common denominator, thus its easy to calculate. 3) (7/15...
*November 26, 2013*

**physics**

v = 50 m/s h = 100 m = x x = 1/2 at^2 t = (square root) x/(1/2) t = 4.51 s Vi = 50 m/s so you have to find the final speed if you want to find the angle of projection, vi = 0 m/s i think cannot be zero vf^2 = vi^2 + 2ad I'm sorry you're going to have to look up this. ...
*November 26, 2013*

**maths**

Are you trying to solve for y?
*November 26, 2013*

**Math**

To calculate the mean we add up all of the numbers and divide by the total number amount for e.g. you have 5 numbers here. Add them up and divide by 5 b) The standard deviation is that complicating equation. You can check this on google to get the exact formula and i think if ...
*November 26, 2013*

**poiseuille's law**

GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at) (A) = (P at ) (pie...
*November 26, 2013*

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