Thursday
December 18, 2014

Posts by sarah


Total # Posts: 4,457

Math- urgent
Harry buys American cheese at the deli. He buys 1/4 pound at the cost of x dollars per pound. If he pays $12.25 for 2.5 pounds of cheese, what is the cost per pound? Please show your work.
April 27, 2014

Math- urgent
Thank you!
April 27, 2014

Math- urgent
Z/2-6=4 What does z equal? Please show your work.
April 27, 2014

Physics
A glass window pane has an area of 3.50 m2 and a thickness of 0.600 cm. If the temperature difference between its surfaces is 23.0°C, what is the rate of energy transfer by conduction through the window?
April 22, 2014

health
Which symptoms are more common in depressed children and adolescents than in adults with depression? A. Fears of separation B. Reluctance to meet people C. General aches and pains D. All of the above
April 19, 2014

health
I think its with b or c?
April 19, 2014

health
What is major depressive disorder? A. A disorder that is enabling and helps a person function normally B. A disorder characterized by symptoms that interferes with a person’s ability to work, sleep, study, eat, and enjoy once-pleasurable activities C. A disorder ...
April 19, 2014

budgiting
Which one of the following statements best describes a budget "blind spot"? A. Too little money was set aside to cover an expense. B. This is an expense the person overlooked or did not account for when setting up the budget. C. This is an item that requires periodic...
April 18, 2014

Health
The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above
April 17, 2014

Health
________ is the most frequently reported bacterial sexually transmitted disease in the United States. A. Chlamydia B. Syphilis C. Herpes D. Gonorrhea
April 17, 2014

Math- urgent
How can -2.65 be written as the ratio of two integers?
April 16, 2014

Chemistry
For the balanced redox reaction 2 Al(s) + 3 Br2(g) → Al2Br6(s), determine the number of electrons transferred in the overall reaction.
April 14, 2014

DrBob222
Just for my understanding if you don't mind could you explain how you were able to get 5e? I was able to derive everything else except that portion.
April 14, 2014

Math
Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
April 13, 2014

Algebra
Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
April 12, 2014

Chemistry
That's brilliant help :) thank you so much
April 12, 2014

Chemistry
im just stuck on how to do the last part. 5.00 = 4.74 + lot (15/x) Solve for x = millimoles acetic acid and convert that to grams in 500 mL solution ? thank you very much
April 12, 2014

Chemistry
Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium ...
April 12, 2014

Calculus
When one-sided limits are not equal to each other at a point, what can be said about the continuity of the function at that point? I know that when one-sided are not equal to each other then the limit does not exist at that point. but i do not know what can be said about the ...
April 11, 2014

Calculus
Use the alternate definition, lim x->a f(x)-f(a)/x-a, to determine the instantaneous rate of change of f(x)= 1/x at the point (1,1/5) a)1/5 b)-1/5 c)1/25 d)-1/25
April 11, 2014

University
yes, it will be treated the same :)
April 10, 2014

University- Canada
Getting a degree from a university or college is pretty much the same and they both are good. Now, some Canadian colleges give out diplomas (for certain courses)and diplomas are not as high as degrees. This is mainly because diplomas can be earned in under 4 years which the ...
April 10, 2014

Calculus
Would you be able to help me with a couple of questions? thanks in advanced! 1. I am given the graph f(x)=x^2-2x. I have to draw a line tangent to the point (0,0). Then, I have to estimate the slope at that point. how would I go about answering this question? would I first ...
April 10, 2014

Calculus
Thanks Steve! For 2a, I meant 5/2+x, then i got 5/2+1 and then 5/3
April 10, 2014

Calculus
I was wondering if you would be able to check if my answers are correct: 1. An oil tank is being drained for cleaning. After t minutes there are v litres of oil left in the tank, where v(t)=40(20-t)^2, 0<=t<=20. Determine the rate of change at the time t=10. For this ...
April 10, 2014

Calculus
I am stuck on both of these questions. Would you please tell me if my reasoning is correct? 1. An object is dropped off a building. When comparing the average velocity of the object over equal time intervals, explain the difference between early time intervals and later time ...
April 10, 2014

Calculus
which of the following is not a type of break in the graph? a) holes b) horizontal asymptotes c) jumps d) vertical asymptotes I know for sure that a is not the answer and i doubt that c is the answer. I think the answer would be b. 2. Describe what can be inferred about the ...
April 9, 2014

Calculus
I am re-posting this question because i wrote the incorrect function last time. An oil tank is being drained for cleaning. After t minutes there are v litres of oil left in the tank, where v(t)=35(25-t)^2, 0<=t<=25 a) determine the average rate of change of volume during...
April 9, 2014

health service management
Do you feel that benchmarking decreases creativity? Explain your answer.
April 9, 2014

Calculus
I have a couple of questions and i wanted to know if my answers are correct. Thanks in advanced! 1. Determine the values of x for which the function f(x)=x+2/x-2 is discontinuous Would the answers be x=2 because the function would be undefined? 2. An oil tank is being drained ...
April 9, 2014

statistics
Since, in general, the longer a car is owned the more miles it travels one can say there is ______ between age of a car and milege. a positive association, no association, a negative association, a scattered association
April 2, 2014

Physics
A 2115 kg car moving east at 10.61 m/s col- lides with a 3169 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 32.4◦ north of east and at a speed of 5.03 m/s. What was the speed of the 3169 kg car before the collision?
April 1, 2014

Physics
sorry, my diagram is not showing properly .. it is a pulley with mass one hanging from the left side and mass two hanging from the right side
April 1, 2014

Physics
For the system of two crates and a pulley in the figure below, what fraction of the total kinetic energy resides in the pulley? (Assume m1 = 14 kg, m2 = 10 kg and mpulley = 5 kg.) (( o )) | | | | [m1] | [m2]
April 1, 2014

Math- urgent
The second of two numbers is five more than the twice first. The sum of the numbers is 44. Find the numbers. Show all work.
April 1, 2014

Physics
A 3000N force stretches a wire by 2.0mm. A second wire of the same material is twice as long and has twice the diameter. How much force is needed to stretch it by 1.0 mm?
March 31, 2014

Physics
A 0.559 kg particle has a speed of 2.7 m/s at point A and kinetic energy of 8.4 J at point B. What is its kinetic energy at A?
March 31, 2014

Biology (fetal pig)
What substance passes through the glottis? [Is it Air??] What substances passes through the esophagus? [I don't know if this is food] please help. thanks
March 28, 2014

physics
what is the final temperature when 3 pound of water at 100 degree fahrenheit is added to 500 lb at 40 degree fahrenheit
March 26, 2014

history
Which of the following is true of the Industrial Workers of the World (I.W.W.)? A. It was founded in Russia. B. It made business leaders create new methods to deal with labor issues. C. It had very little influence over the labor movement. D. It was devoted to organizing ...
March 25, 2014

Maths
A population of 3.5 million bacteria increases by 48800 How many bacteria are there now?
March 23, 2014

AED
I need help in trying to figure out why teachers in the Northern states are being paid more then those in the South? And also why more money is being spent on student's education in the North. Thank you!
March 17, 2014

World Geography
Imagine you are an elected official with the responsibility of drafting legislation designed to protect our environment. What items will you include in your bill? Who will be responsible for the bill's implementation? Its enforcement? Your response should be 200 words in ...
March 6, 2014

Math
Given l || m, m<9 = 9x + 5, and m<5 = x+ 37, find the value of x
March 6, 2014

Math
Find the measure of the sides of an equilateral (triangle)PQR if PQ = 5x - 7 and PR = 2x + 5
March 6, 2014

Math
Given m<10 = 5x + 2, and m<6 = 3x + 28, find the value of x so that l || m
March 6, 2014

physics
A string going over a massless frictionless pulley connects two blocks of masses 4.4 kg and 11 kg. As shown on the picture below, the 4.4 kg block lies on a 23◦ incline; the coefficient of kinetic friction between the block and the incline is μ = 0.29. The 11 kg ...
March 6, 2014

physics
A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at points circle a and ...
March 4, 2014

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

science
I don't know either
January 16, 2014

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