Saturday
October 22, 2016

# Posts by erica

Total # Posts: 602

English
I have to write a 700 word essay on what my name means ????????????? And I need help!!!!
September 19, 2011

Science
What is the pressure at the bottom of a tube of mercury that is 0.2 m deep? An elephant with a mass of 1000 kg stands on a circus platform that weighs 50 kg. The area of the bottom of the platform is 1.25 m². How much pressure is exerted on the floor beneath the platform...
September 15, 2011

SCIENCE
When the following are placed in water, for which of them will the buoyant force be more than as its weight? A) an ice cube B) a piece of frozen glycerin C) a gold ring D) a piece of aluminum foil 2. Sometimes when I get in my swimming pool I take a plastic cup filled with ...
September 15, 2011

SCIENCE
When the following are placed in water, for which of them will the buoyant force be more than as its weight? A) an ice cube B) a piece of frozen glycerin C) a gold ring D) a piece of aluminum foil 2. Sometimes when I get in my swimming pool I take a plastic cup filled with ...
September 15, 2011

Science
thanks so much
September 11, 2011

Science
A satellite orbiting at an elevation of 3200 km does what a) Stays beyond the earth's gravity, which is why it stays up there. B) in an elliptical orbit, since its speed is less than the escape velocity. C) Falling toward earth with an acceleration equal to g. D) Falling ...
September 11, 2011

Algebra
5(2n + 4) - 3(4n - 6) = 2(20 - n) I solved this equation and this is what I got. 10n + 20 - 12n + 18 = 40 - 2n -2n + 38 = 40 -2n 38 ≠ 40 What does this mean? Thank you!
August 31, 2011

Chemistry
A mixture of gases at 760.0 torr contains 35.0% nitrogen, 22.0% oxygen , and 43.0% carbon dioxide by volume. What is the pressure of the carbon dioxide gas in torr?
August 19, 2011

Greek
The Greek base HELI- means?
July 19, 2011

anatomy and physiology 1
which membrance surround and protect the vital organs in the chest cavity?
July 15, 2011

anatomy and physiology 1
July 15, 2011

anatomy and physiology 1
describle two vision disorders that cause abnormal eyeballshape.
July 15, 2011

algebra II
Simplify: a^4-b^4/a-b
July 3, 2011

algebra II
Simplify: (3c^2)(-6cd)^-2
July 3, 2011

physics
Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP!! i have tried so many different ways and can't seem to get the answer
June 2, 2011

physics
Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.
June 2, 2011

calculus
3. A deposit of ___(i)___is made into an account paying an interest rate of 5% compounded annually. How many annual payments of ___(iii)___can be made from this account? a) (i)\$100,000 (ii)\$10,000 b) (i)\$200,000 (ii)\$20,000 c) (i) 10x (ii) x d) (i) 10x (ii) x at r% compounded ...
June 1, 2011

global history
the wealth that enabled the Italian city-states to lead in the development of Renaissance arts was derived mainly from? a)the quantities of gold and silver brought back to Italian explorers b)concentration of riches in the hands of the king and his court c)their participation ...
May 31, 2011

physical science
you are standing on a street corner, and you hear a fire truck approaching. does the pitch of the siren stay constant, increase, or decrease as it approaches you? does the pitch of the siren stay constant, increase, or decrease as it moves away?
May 23, 2011

stats
A company with a large fleet of cars found that the emissions systems of 18 out of the 65 randomly selected cars they tested failed to meet pollution control guidelines. Is this strong evidence that more than 20% of the fleet might be out of compliance? Test the appropriate ...
May 11, 2011

Calc
To what limit does the sequence Sn = (3+n) /3^n converge as n approaches infinity?
May 3, 2011

Calc
How do you know what shape the graph in the xy-plane represented by x=3sin(t) and y=2cos(t) is?
May 3, 2011

calc
The rate that an object cools is directly proportional to the difference between its temperature ( in Kelvins) at that time and the surrounding temperature (in Kelvins). If an object is initially at 35K, and the surrounding temperature remains constant at 10K, it takes 5 ...
April 25, 2011

Calc
A particle moves along a path described by x=cos³t and y=sin³t. The distance that the particle travels along the path from t=0 to t=π/2 is... Thank you!
April 25, 2011

calc
If f(x)= (3x)^(3x), then f'(x) = ? Thank you!
April 25, 2011

Calc
What is the volume of the solid generated by rotating about the y-axis the region enclosed by y=sinx and the x-axis, from x=0 to x=π? Thank you for your help!!
April 25, 2011

calc
If a particle moves in the xy-plane so that at time t>0 its position vector is (e^(t²), e^(-t³)), then its velocity vector at time t=3 is...? Thanks so much!
April 25, 2011

Calc
Find the integral from 1 to 0 of arcsin(x)dx Thank you!
April 25, 2011

Calc
Use differentials to approximate the change in the volume of a cube when the side is decreased from 8 to 7.99 cm. (in cm^3) Thank you so much!!
April 25, 2011

Calc
Use differentials to approximate the change in the volume of a cube when the side is decreased from 8 to 7.99 cm. (in cm^3) Thank you so much!!
April 25, 2011

Calc
What is the limit as x approaches infinity of 4xsin(1/x)? Can you also show me how you get the answer? Thank you so much!!
April 25, 2011

goverment
For the first eleven years of its existence, the United States was a _____.
April 12, 2011

macroeconomics
a description of a specific macroeconomic phenomenon or event and how it has impacted you
March 30, 2011

hcs 341
How can an organization forecast future staffing needs in order to maintain consistent staffing levels?
March 18, 2011

social studies
Christopher Columbus' treatment of Native Americans can BEST be described as friendly, peaceful but not friendly, violent& hostile,or fair?
March 11, 2011

Chemistry
What is the percentage of potassium chloride to oxygen?
March 7, 2011

Chemistry
What is the percentage of potassium chloride to oxygen?
March 7, 2011

Calc
I have to find the integral of 1/(sq. rt. of (4x-x²)) dx. I know I have to complete the square of the denominator, but im confused on how that process works when im only given 4x-x². Could you demonstrate how to complete the square for that equation? Thank you so much!
February 22, 2011

Calc
The line y = mx+b with b≥2 is tangent to the graph f(x) = -2(x-2)² + 2 at a point in the first quadrant. What are all possible values of b?
February 22, 2011

Calc
If dy/dt = 2y/(t(t+2)) for t>0 and y = 1 when t = 1, then when t = 2, y = ?
February 22, 2011

Calc
A rectangle is to be inscribed in a semicircle of radius 8, with one side lying on the diameter of the circle. What is the maximum possible area of the rectangle?
February 22, 2011

calc
If dy/dx = xy - y^2 and y(1) = 3, then y (2) = ?
February 22, 2011

Calc
If n is a positive integer, find the limit as n approaches +∞ of 1/n(sin (π/n) + sin (2π)/n + ... + sin (nπ)/n)
February 21, 2011

Calc
Let f(x) = x^3 - 7x^2 + 25x - 39 and let g be the inverse function of f. What is the value of g'(0)?
February 21, 2011

Calc
If the substitution u=x^2 + 1 is made, then the integral from 0 to 2 of [(x^3)/(x^2 + 1)]dx = ? Thank you for your help!
February 21, 2011

chemistry
at 327 degrees C, the equilibrium concentrations are [CH3OH]=0.15M, [CO]=0.24M, and [H2]=1.1M for the reaction: CH3OH(g)<-->CO(g)+2H2(g) Calculate Kp at this temperature
February 16, 2011

Calc
Find the indefinite integral. Integral of [1/(4+3x²)]dx Thank you so much for your help!
February 16, 2011

Calc
Find the indefinite integral. Integral of (2x)/(x-4)dx Thank you so much!
February 16, 2011

Calc
Find the indefinite integral. Integral of (x+1)/(√(x²+2x-4))dx Thank you for your help!
February 16, 2011

Calc
What is the antiderivative of dy/dx = x/(x^2 + 1)?
February 15, 2011

Calc
The base of a solid is a circle of radius a, and its vertical cross sections are equilateral triangles. The volume of the solid is 10 cubic meters. Find the radius of the circle.
February 10, 2011

human resource management
Which of the following would not be an informative or positive message? a. Summary b. Claim adjustment C. Transmittal d. Direct request
February 8, 2011

HUMAN RESOURCE MANAGEMENT
When writing informative and positive messages, you should include reader benefits when:
February 8, 2011

human resource management
Informative and positive messages are not necessarily short: Instead , the length of a message depends on all the following EXCEPT:
February 8, 2011

math
Look at a multiplication table.
February 7, 2011

problem solving
Try to first multiply it. You should get your answer correct that way. :-)
February 7, 2011

Writing
February 7, 2011

Measurments
What don't you understand the inches or the millimeters?
February 7, 2011

Math
go to google and type in ixl then click on the website. click on first grade. try this site, and let me know if this helps. :-)
February 7, 2011

Math
February 7, 2011

Math
Okay is it 1 or i?
February 7, 2011

Math
Your question is not a question. What are you asking help for? 52 and what number?
February 7, 2011

Is predator-prey the most important ecological relationship? Thanks everyone!
February 7, 2011

YESS!!! you are a life saver! ;-)
February 7, 2011

On one of my tests they are asking me if Symboin pandora has a symbotic reletionshio with the Norway Lobster. In my lesson the answer is yes but with the NORWEIGAN lobster. Is this a typo or are the two lobsters the same lobster but with different names? I am soooo.... ...
February 7, 2011

Calc
Set up and evaluate the definite integral for the area of the surface generated by revolving the curve about the y-axis. y = cube rt. (x) + 2 Thank you so much!!
February 7, 2011

Calc
Set up and evaluate the definite integral for the area of the surface generated by revolving the curve about the x-axis. y = (x³/6) + (1/2x), 1≤ x ≤ 2
February 7, 2011

Calc
Find the arc length of the graph of the function over the indicated interval. y = (x⁵/10) - (1/(6x³)) , [1,20] Thank you so much!!
February 6, 2011

Calc
What is the area bounded by the graphs of y = 4x - x² and y = x? Thank you!!
February 2, 2011

Calc
What is the area of the region located between the graphs of y = -x² + x + 4 and y = 2? Thank you so much!
February 2, 2011

Calc
How do you integrate sin²x?
February 2, 2011

Calc
Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the x-axis. y = sin x, y = 0, x = 0 I just need help setting up the formula. So far I got V= the integral from 0 to pi of [(sin²x) - 0²]dx. Is that correct? ...
February 1, 2011

physics
I do not know
January 24, 2011

Calc
The slope of a curve at each point (x,y) is given by 4x - 1. Which of the following is an equation for this curve if it passes through the point (-2,3)? A) y=4x²-x-15 B) y=x²-4x-9 C) y=2x²-x-7 D) y=2x²-x E) y=2x²-x+7
January 23, 2011

Calc
Given function f defined by f(x) = ( 1- x)³. What are all values of c, in the closed interval [0,3], that satisfy the conditions of the Mean Value Theorem?
January 23, 2011

Calc
A rectangular box, with a square base and open at the top is to be constructed. If the volume of the box needs to be 108 cubic feet, what is the minimum surface area?
January 23, 2011

Calc
Various values for the derivative, f'(x), of a differentiable function f are shown below. x=1, f'(x) = 8 x=2, f'(x) = 4 x=3, f'(x) = 0 x=4, f'(x) = -4 x=5, f'(x) = -8 x=6, f'(x) = -12 If f'(x) always decreases, then which of the following ...
January 21, 2011

Calc
y = x^2 y = 6 - x Find the area of the region by integrating (a) with respect to x and (b) with respect to y.
January 18, 2011

Calc
y = x^2 y = 6 - x Find the area of the region by integrating (a) with respect to x and (b) with respect to y.
January 18, 2011

Calc
If y = (cos²x)/(1 + sin x), then dy/dx = ?
January 18, 2011

Calc
If y = (sec x)/(tanx), then dy/dx = ?
January 18, 2011

Calc
Limit as x approaches +∞ of x sin (1/x)
January 18, 2011

Calc
Find the limit as x approaches 0 of (sin x)/(x + tan x)
January 18, 2011

Calc
Find the limit as h approaches 0 of sin²(3x+3h) - sin²(3x) / h
January 18, 2011

Calc
Find the limit as x approaches π of (cos x +1)/(x-π)
January 18, 2011

health, safety, and nutrition for the young child
a child who moved from throwing a ball using only an elbow movement to throwing a ball using her elbow, wrist, and shoulder is showing signs of _____ development. (a)intertask (b)spatial (c)joint-plate (d)intratask
January 17, 2011

Anatomy and Physiology
Urine passes from the bladder to the outside of the body through a tube called the .Urethra Muscles are attached to bones by structures called .Tendons Communication, integration, and control are the primary functions of two body systems called and . Nervous and Endocrine The ...
January 12, 2011

Anatomy and Physiology
Movement of bones in the skeletal system is made easier because of the existence of connections between bones called. JOINT Organs arranged in such a way that together they can perform a more complex function than can any one organ alone are called. SYSTEMS The pituitary, ...
January 12, 2011

Physics (Help!)
Ok thanks. Can 1/2K also be written as K/2?
January 9, 2011

Physics (Help!)
Can you please explain it a little more. I still don't understand it.
January 9, 2011

Physics (Help!)
You throw a glove straight upward to celebrate a victory. Its initial kinetic energy is K and it reaches a maximum height H. What is the kinetic energy of the glove when it is at the height H/2?
January 9, 2011

Science-Physics
That helped a lot. Thank you so much.
January 9, 2011

Science-Physics
You push a 67 kg box across a floor where the coefficient of kinetic friction is uk = .55. The force you exert is horizontal. (a) How much power is needed to push the box at a speed of .50 m/s? (b) How much work do you do if you push the box for 35 s? *please list the steps to...
January 9, 2011

1. solve sqrt (11-x) = sqrt(x-7) choices are 6,7,8 or9 I think according to my calcs the answer is (9) The range of f(x) = sqrt(3x-6) - 2 answers would be y<= (-2) y>= (-2) y> (-2) y<=(2) I think the answer is y <= -2, correct I don't get this one at all: ...
January 8, 2011

Calc
A body of an unknown temperature was placed in a room that was held at 30°F. After 10 minutes, the body's temperature was 0°F, and 20 minutes after the body was placed in the room the body's temperature was 15°F. Estimate the body's initial temperature...
January 6, 2011

Calc
The number of bacteria in a culture is increasing according to the law of exponential growth. There are 125 bacteria in the culture after 2 hours and 350 bacteria after 4 hours. a) Find the initial population. b) Write an exponential growth model for the bacteria population. ...
January 6, 2011

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