Saturday
October 10, 2015

# Posts by Abigail

Total # Posts: 199

Calculus
I'm sorry, I was having some problems posting the questions.... Again Let f(x)= mx-12 if x is less than -5 x^2 +5x - 7 if x is greater than -5 Show that f(x) has a removable discontinuity at x=−7 and determine what value for f(−7) would make f(x) continuous at ...
February 6, 2011

Calculus
A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a...
February 6, 2011

Calculus
A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of ...
February 6, 2011

Calculus
An electrical circuit switches instantaneously from a 2 volt battery to a 20 volt battery 3 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by your graph. For t &...
February 5, 2011

Calculus
Sorry... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 ¡Ü x ¡Ü 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) = k for which values of c and k? Fill in the following mathematical statements, ...
February 5, 2011

Calculus
Consider the function f(x)=8.5x−cos(x)+2 on the interval 0¡Üx¡Ü1 . The Intermediate Value Theorem guarantees that there is a value c such that f(c)=k for which values of c and k? Fill in the following mathematical statements, giving an interval with...
February 5, 2011

Chemistry
What is the equation for heat of CuCO3 and heat of Pb(NO3)2.
February 3, 2011

arithmetic
What is the area of the irregular shape of a cone if the radius is 7in and the height is 22in?
January 24, 2011

Algebra
@helper: Yes, thats it! I wasnt sure how to type it. I solved it while I was waiting, and thats the answer I got ,thanks so much!
January 6, 2011

Algebra
I really need help with this, please!
January 6, 2011

Algebra
I have an exponent properties test tomorrow, its our last one before the final, so its important, but anyways, there is one question on the review that is confusing me. Could you please help? Here it is : (2y2x7)(-xy)(9x-3y) I dont know if the exponents showed up, but the ...
January 6, 2011

math
NO. it should be 6.5ft = x 334.75 ft=33.2x 33.2ft 51.5ft 10.08ft=x x=10 (aprox)
November 9, 2010

english
I'm a 8th grade student and i need to write a Proffesional Business letter to My 7th grade english Teacher can you help?
October 22, 2010

english
How about The world of English Language.
October 22, 2010

awnser is 39.36 but i might be wron.
October 12, 2010

math
Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to and different from adding polynomial expressions? Provide a radical expression for your classmates to simplify. In your own words, explain the first ...
October 11, 2010

Complete to show how you can find the sum by making a ten, hundred or thousand. 9.8 +5= (8 +2) + ______
October 5, 2010

Science
A truck is going from 20 km/h to 59 km/h in .20 hours, has an acceleration of what?
September 14, 2010

English Literature
What are the external human problems? Thank you!
September 6, 2010

English
What is the object of preposition in this sentenc? Sheepishly, she told her father the story.
August 24, 2010

Physics
Figure 10-42 shows a uniform disk that can rotate around its center like a merry-go-round. The disk has a radius of 2.00 cm and a mass of 20.0 grams and is initially at rest. Starting at time t = 0, two forces are to be applied tangentially to the rim as indicated, so that at ...
July 28, 2010

Physics
Two vectors are given by a = 3.7i + 6.9j, and b = 1.9i + 4.7j. Find (b) a·b = (c) (a + b)·b = (d) the component of a in the direction of b = .
July 22, 2010

ECONOMICS
T OR F A rise in Canadian interest rates will boost the dollar's exchange value, reducing domestic price levels.
June 22, 2010

ECONOMICS
T OR F A payment made to a Canadian shareholder from an American corporation would be recorded as an invisible import.
June 22, 2010

ECONOMICS
T or F Interest payments on Canadian government debts to foreigners are a major reason for our negative current account.
June 22, 2010

calculus
A ball was tossed into the air. its height, in metres, is given by h(t)= - 4.9t^2 + 6t + 11, where t is time, in seconds. Write an expression that represents the average rate of change over the interval 2<t<2 + h.
June 15, 2010

calc
How long will it take for the population to reach 10 times its initial level? y=50(e)^(0.5t)
June 15, 2010

Calculus
Identify the coordinates of any local extrema of the function y=e^x - e^(2x).
June 15, 2010

Calculus
Determine the equation of the line perpendicular to the tangent line to the function f(x) = 1/2 (e^x)at the point on the curve where x=ln3.
June 15, 2010

Calculus
Solve: 20 = 10 (2^x)(ln2)
June 15, 2010

vectors
Find the distance between the parallel line and plane: l: r=[2,0,1] + t[1,4,1] pi: 2x - y + 2z = 4
June 6, 2010

Calculus
Write a scalar equation of each plane, given its parametric equations. x = 3 - 2s + 2t y = 1 + 3s + t z = 5 - s - 2t
June 5, 2010

VECTORS
Write a scalar equation of each plane, given its vector equation. [x,y,z] = [3,7,-5] + s[1,2,-1] + t[1,-2,3]
June 5, 2010

English
What is the point of view of the followng quote from the story Journey "you turn onto this road, which winds among the foothills and forests and goes through several small villages"
May 26, 2010

calculus
What conditions must be satisfied by vectors u and v for this to be true? |u + v| >|u - v|
May 24, 2010

CALCULUS
Under what conditions does |proj of a on b| = |proj of b on a| for two non zero vectors? Show why.
May 24, 2010

english
what are the indefinite pronouns
May 21, 2010

45 divided by three is 15!
May 19, 2010

Math--
The answer is (A)
May 19, 2010

chemistry
What is the chemical equation for: 1. Cyclohexane and Potassium Manganate VII 2. Cyclohexen and Potassium Manganate VII
May 18, 2010

blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green red blue yellow yellow green green ...
May 18, 2010

Modifies means describes
May 10, 2010

Well you can get a small candle, light it up,put wax on a plate, stick it on the plate,pour a little water on the plate about an inch,and then put the glass cup on it.it will suck up the water.it has to do with the water taking the oxygens place.
May 3, 2010

they use radars from the satelites
April 24, 2010

several,and fewer
April 21, 2010

Chemistry
How much would 3.45* 10^21 C12H22 O11 molecules weigh
April 18, 2010

puzzled unsure befuddled lots:)
April 15, 2010

English
fill in the blanks!
April 14, 2010

maybe rectangular prism
April 3, 2010

6th grade - English
ugly and beautiful
March 22, 2010

past perfect!
March 17, 2010

past perfect
March 17, 2010

Chemistry
What are the balanced equation for the following reactions: HCl and Sodium Hydrogen Carbonate HCl and Copper oxide HCl and Calcium carbonate HCl and Magnesium NaOH and Ammonium Chloride
March 9, 2010

Chemistry
What is the boiling point of heaxane?
February 28, 2010

Pre Algebra
Which product equals 3t-12? a. 4(t-3) b. (4-t)3 c. 3(t-4) d. (3-t)4
February 13, 2010

I am having trouble with getting focused on WANTING to do my schoolwork. I want good grades and I am just not motivated!!
January 10, 2010

I am having trouble with getting focused on WANTING to do my schoolwork. I want good grades and
January 10, 2010

Geometry
The midpoint of line segment AB is (1,2). The coordinates of A are (-3,6). Find the coordinates of B. I know how to figure out midpoint, but I'm having trouble figuring out how to do this problem. Any help would be appreciated. :)
September 23, 2009

1/3 converts too?
August 31, 2009

what is -7+(-3)=_______
April 23, 2009

Ms. Sue is right a foot does equal 12 inches
April 23, 2009

math
the area of the circle was measured to be 29/30 of it original area.find the percentage error made in measuring area.
April 14, 2009

SOCIOLOGY
what are task groups, self/awareness groups
March 4, 2009

Geography
this is good
January 30, 2009

English-Jane Eyre
I'm so sorry to trouble you with these typos! And thanks so much for the corrections! But in my computer, I don't have any upside down exclamatory marks. They are both apostrophes. I don't know why it shows that way. (weird!!) And when you said hyphens, doesn't...
January 20, 2009

English-Jane Eyre
This is a book review that I have wrote for Jane Eyre by Charlotte Bronte. Could you please check if I have any obvious mistakes and give me a comment for this? Or a grade out of 20? 1. Title: Jane Eyre 2. Author: Charlotte Bronte 3. Genre: Romance, Gothic, Bildungsroman 4. ...
January 20, 2009

sequnces
my teacher said to find out about a sequce and find the man it is named after . it is 1,1,2,3,5,8,13,21........ and i have got to find out the rest
October 12, 2008

math(sequences)
plese help me
September 9, 2008

math(sequences)
well my teacher said to find out what this sequece ment and who was the man who invented it .it goes like 1,1,2,3,5,8,13,21 ............... and i have got to find out the rest too the last number
September 9, 2008

trig
Give the phase shift in radians (along x) of f (x) = sin(x plus 4t+3/7)
April 17, 2008

trig
Give the phase shift in radians (along x) of f (x) = sin (x - 3pi/5
April 17, 2008

trig
Please answer b)only a) If a triangle has angles of 35 and 65 degrees, what is the measurment of the third angle? Is it a right triangle? b)Find all angles of a right triangle triangle RST given that r = 18 cm and s = 20 cm
April 16, 2008

trig
Find all angles of a right triangle triangle RST given that r = 18 cm and s = 20 cm
April 16, 2008

trig
Work out the following identities a) sin theta/cos theta b) tan theta cos theta
April 16, 2008

trig
If an angle is pie radians, what is the arc length in radians?
April 16, 2008

trig
If an angle is 1 radian, what is the arc length in radians?
April 16, 2008

chemistry
b) Would a precipitate form? The Ksp of AgCl(s) is 1.8 x 10-10. Also, please check if my answer to be is also correct or not When comparing the ion product to Ksp, I see that 0.001375 is greater than 1.8 x 10^-10, therefore a precipitate will form.
April 16, 2008

chemistry
Question:A solution of AgNO3 (45 mL/0.45 M) was mixed with solution of NaCl (85 mL/1.35 x 10-2 M) a) Calculate the ion product of the potential precipitate. My answer: mol AgNO3 = M x L = 0.45 M x 0.045 M = 0.02025 mol NaCl = M x L = 0.0135 M x 0.085 L = 0.0011475 (Ag^+) = ...
April 16, 2008

chemistry
Please judge my answer Question:A solution of AgNO3 (45 mL/0.45 M) was mixed with solution of NaCl (85 mL/1.35 x 10-2 M) a) Calculate the ion product of the potential precipitate. b) Would a precipitate form? The Ksp of AgCl(s) is 1.8 x 10-10. Answer: For a, doing the ion ...
April 15, 2008

chemistry
Please judge my answer, thank you Question: What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10-10? Answer: It is imperative to initially set up ionization. THen, it becomes important to write the Ka expression, after which setting up an ICE table becomes ...
April 15, 2008

chemistry
Please judge my answer: Question: 24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5. Answer: The equation for this...
April 15, 2008

chemistry
rats....:)
April 15, 2008

chemistry
Please let me know if my answer to the following question is correct. Question: What is the concentration of a weak base if its Kb = 1.4 x 10-11 and its pH = 8.75? Answer: Converting pH to H^+ concentration using the formula H^+ = 10^-ph, therefore 10^-8.75 gives an H^+ ...
April 15, 2008

chemistry
Please let me know if my answer is correct. Question: A weak base with a concentration of 1.3 mol/L has a percent ionization of 0.72%. What is the Kb of this weak base? Answer: Calling the weak base SHO, SHO --> S^+ plus HO^-. I know that the formula for Kb, therefore, will...
April 15, 2008

chemistry
Please let me know if my answer to the following question is correct. Question: 25 mL of standardized 0.45 mol/L NaOH is titrated with 21 mL of 0.35 mol/L acetic acid. Calculate the pH of the solution. Answer: Add 25 mL and 21 mL to get 46 mL. Add 0.45 mol/L and 0.35 mol/L to ...
April 15, 2008

ALGEBRA WITH PIZZAZZ
anybody have the riddle to why do elephants have ivory tusks.
April 6, 2008

science
Does the mass of tap water change when salt is added.
November 4, 2007

government
So in communism, it is the government that controls the economy whereas in democracy the people control it?
October 25, 2007

government
Do not they both mean that the government is solely in charge, not the people?
October 25, 2007

government
What is the difference between a totalitarian and a communist government? Thank you!
October 25, 2007

social studies-Ms. Sue
Thanks a million!
October 22, 2007

social studies-Ms. Sue
"Immigrants have frequently been accused of taking jobs from "real" Americans. Politicians who oppose immigrants often use this as a reason. The problem with this argument is that many immigrants work very hard for minimum (or lower) wage that doesn't ...
October 22, 2007

social studies
Is there a specific reason why these politicians like to use immigrants as a scapegoat?
October 22, 2007

social studies
According to Wikipedia, "the problems which are purportedly caused by immigrants equally exist amongst native-born populations as well, and that politicians often use immigration as a convenient scapegoat to distract the public from real social, political and economic ...
October 22, 2007

Calculus
How do you prove area of a circle? Integrate an incremental area dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians. Area= INT INT dTheta rdr dTheta Area= 2PI (1/2 R^2)= PI R^2
March 1, 2007

social studies
gender issues applied to learning and development Boys’ stereotypes in k-12 to Grade 2 . How these issues will affect boys’ learning and development? Girls’ stereotypes in K-12 TO Grade 2. – How these issues will affect girls’ learning and development...
December 6, 2006

science
tell me about the carbon cycle. what are the steps in it? http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/CarbonCycle.html
October 31, 2006

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