Thursday
April 24, 2014

Posts by Abigail


Total # Posts: 175

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.

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

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

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.

Calculus
Solve: 20 = 10 (2^x)(ln2)

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

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

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]

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"

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

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

english
what are the indefinite pronouns

Math 6th grade
45 divided by three is 15!

Math--
The answer is (A)

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

6th Grade Math
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 r...

6th grade
Modifies means describes

6th grade
4.5

6th grade science
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.

6th grade science
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.

6th Grade Science
they use radars from the satelites

6th Grade Grammar
several,and fewer

Chemistry
How much would 3.45* 10^21 C12H22 O11 molecules weigh

6th grade
puzzled unsure befuddled lots:)

English
fill in the blanks!

6th Grade Math
maybe rectangular prism

6th grade - English
ugly and beautiful

6th Grade Grammar
a!

6th Grade Grammar
past perfect!

6th Grade Grammar
past perfect

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

Chemistry
What is the boiling point of heaxane?

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

6th grade science
I am having trouble with getting focused on WANTING to do my schoolwork. I want good grades and I am just not motivated!!

6th grade science
I am having trouble with getting focused on WANTING to do my schoolwork. I want good grades and

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. :)

7th grade
1/3 converts too?

5th grade math
what is -7+(-3)=_______

5th grade math
Ms. Sue is right a foot does equal 12 inches

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

SOCIOLOGY
what are task groups, self/awareness groups

Geography
this is good

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...

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. Da...

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

math(sequences)
plese help me

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

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

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

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

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

trig
Work out the following identities a) sin theta/cos theta b) tan theta cos theta

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

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

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.

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^+) = mol...

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 prod...

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 n...

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...

chemistry
rats....:)

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^+ concen...

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...

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 ...

ALGEBRA WITH PIZZAZZ
anybody have the riddle to why do elephants have ivory tusks.

science
Does the mass of tap water change when salt is added.

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

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

government
What is the difference between a totalitarian and a communist government? Thank you!

social studies-Ms. Sue
Thanks a million!

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 attrac...

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

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 pro...

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

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?...

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

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