Thursday
September 18, 2014

Posts by liz


Total # Posts: 1,155

American Government
Legislation whose tangible benefits are targeted solely at a particular legislator's
November 7, 2013

Calculus-Aproximate Areas
Estimate the area under the graph of f(x)=sin(pix) from x=0 to x=1 using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve a a) left endpoint: b) right endpoint:
November 4, 2013

Calculus-Aproximate Areas
I tried that, and it was incorrect
November 4, 2013

Calculus-Aproximate Areas
Estimate the area under the graph of f(x)=sin(pix) from x=0 to x=1 using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve at a) left endpoint: b) right endpoint:
November 4, 2013

Calculus-Approximate areas
Estimate the area under the graph of f(x)= x^2 + 3 x from x=1 to x=10 using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve at a) left endpoints: b) right endpoints:
November 4, 2013

Calculus-Newton Method Approximation
Use Newton's method to approximate the positive value of x which satisfies x=2.3cosx Let x0=1 be the initial approximation. Find the next two approximations, x_1 and x2, to four decimal places each.
November 1, 2013

Calculus-Applied Optimization Problem
The manager of a large apartment complex knows from experience that 100 units will be occupied if the rent is 425 dollars per month. A market survey suggests that, on average, one additional unit will remain vacant for each 9 dollar increase in rent. Similarly, one additional ...
October 31, 2013

Math
How do I work out:if life expectancy of male is 78.9 and female is 83.6. Life expectancy is % lower than female. What is formula please
October 30, 2013

Physics
A research balloon of total mass 225 kg is descending vertically with a downward acceleration of 1.4 m/s2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 3.6 m/s2, presuming that the upward lift of the balloon does not change.
October 24, 2013

calculus
relative maxima and relative minima 2x^2+ 4000/x +10
October 13, 2013

cinquain poem
thanks for your help and advice
October 8, 2013

cinquain poem
For social studies we had to make our own 4 topic of cinquain poems. I asked some people and not many knew this type of poem, but one person said it all seem good except for the last lines. Do you think I did the format corret? Thanks for your help 1.Homesteaders Brave, ...
October 8, 2013

Math
-10 + 6g = 110
October 2, 2013

math
I have fewer ones than tens. the value of my tens is 20 what two numbers can I be
September 10, 2013

Physics
In a vacuum, two particles have charges of q1 and q2, where q1 = +3.8C. They are separated by a distance of 0.37 m, and particle 1 experiences an attractive force of 4.7 N. What is the value of q2, with its sign? Two spherical objects are separated by a distance of 1.45 ×...
August 26, 2013

cerritos
political culture refers to
July 23, 2013

Calculus 2
A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not enter your answer in ...
June 22, 2013

Calculus 2
Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about x = 4. y = 3 x^4 y = 0 x = 2
June 21, 2013

Franklin High
4x - y = 2, 9x - 2y = 8 find solution by substitution method
June 12, 2013

Calculus help!
Does the limit of xy/(x^2 + y^2) exist as (x,y)--->(0,0)? Why or why not??
June 1, 2013

Calculus help!
Three forces with magnitudes 75 pound, 100 lb, and 125 pound act on an object at angles of 30 degrees, -45 degrees, and 120 degrees respectively. Find the direction and magnitude of the resultant vector.
May 14, 2013

Calculus
Describe the surface and give traces: x = y^2 - 4z^2
May 14, 2013

Calculus-PLZ help!
Given u=3i-2j+k,v=2i-4j-3k, w=-i+2j+2k, 1 Find a unit vector normal to the plane containing v and w. 2 Find the volume of the parallelepiped formed by u, v, and w. 3 Are any of these vectors parallel? Orthogonal? Why or why not?
May 13, 2013

Find the center (h,k) and radius
Find the center (h,k) and radius r of the circle and then use these to (a) graph the circle and (b) find the intercepts, if any. 3x^2+36x+3y^2=0
May 13, 2013

Calculus
Describe the following surface and give traces if available. x^(2)-4z^(2)=4
May 10, 2013

Statistics
You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test.
May 7, 2013

math
245 = .25x not sure how to do this since I have only learned with ratios
May 1, 2013

Chemistry II
Arrange the following 0.10M solutions in order of increasing pH: a. Nacl b. NH4CL C. HCL D. NaCH3CO2 e. KOH
April 30, 2013

College chemistry
The pH of blood is 7.4 and that of saliva is 6.4. what is the difference in pH between these two solutions? How much more Hydronium ion (H3O+) is in the saliva than in the blood. I need a detailed answer with the formulas if you can. I have a hard time with chemestry
April 30, 2013

Chemistry
Thank you :) this helped a lot!
April 30, 2013

Chemistry
Can you explain it better we JUST started this section and im having a hard time with knowing what to put where when it comes to the solutions. what is the acid and what is the base
April 30, 2013

Chemistry
The pK3 of formic acid is 3.75 A)what is the pH of a buffer in which formic acid and sodium formate have equimolar concentration? B)what is the pH of a solution in which the sodium formate is 10M and the formic acid is 1M?
April 30, 2013

statistics
What is the probability that 10 of 100 apples will be < 130 g? mean=173 std deviation=34?
April 23, 2013

Science
For an Indian Youth Environment camp essay why should someone be chosen to go?
April 18, 2013

chemistry
calculate the yield of CO2 if 30.g of C2H6 reacts with 14.0g of O2. Show work
April 18, 2013

Calculus
Find the arc length of the curve described by the parametric equation over the given interval: x=t^(2) + 1 y=2t - 3 0<t<1
April 16, 2013

Calculus help!
On what intervals of t is the curve described by the given parametric equation concave up? Concave down? x=t^2; y=t^(3) + 3t I am a bit confused on how to solve this...any help/explanations are welcome!! (& greatly appreciated!)
April 16, 2013

Calculus
Find the arc length of the curve described by the parametric equation over the given interval: x=t^(2) + 1 y=2t - 3 --> 0<t<1
April 16, 2013

Calculus
Convert the polar equation to rectangular coordinates: r = 2-cos theta ...and find all points of vertical and horizontal tangency.
April 16, 2013

Calculus
Find the arc length of the curve described by the parametric equation over the given interval: x=t^(2) + 1 y=2t - 3 ...0 < t < 1
April 16, 2013

Calculus
On what intervals of t is the curve described by the given parametric equation concave up? Concave down? x=t^2; y=t^(3) + 3t I am a bit confused on how to solve this...any help/explanations are welcome!! (& greatly appreciated!)
April 15, 2013

Calculus
Convert the curve to an equation in rectangular coordinates: x=(t+2); y=-2sqrt(t)
April 15, 2013

Parametric Equations
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4
April 14, 2013

calculus
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4
April 14, 2013

Calculus
Convert to a rectangular equation by eliminating the parameter: x=sin(theta) y=(cos theta)^2
April 13, 2013

Statistics
The Boeing 757-200 ER airliner carries 200 passengers and has doors with a height of 72 inches. Heights of men are normally distributed with a mean of 69 inches and a standard deviation of 2.8 inches. b) assume that half of the 200 passengers are men, what doorway height ...
April 8, 2013

Math- Ms Sue can you help
so the volleyball team had a standard deviation 2.39 and a mean of 68.2 ( I messed up when giving you the numbers, there should have been a comma between 69 &70 not a period-giving 10 numbers) The dance team I got 3.05 standard deviation and a mean of 63 So the should the ...
March 31, 2013

Math-
I didn't do the standard deviation for each one because I didn't know how, can you help?, if not do you have something ( a link to forward me to) so I can review standard deviations. I do appreciate your help.
March 31, 2013

Math- Ms Sue can you help
Here is the height, in inches, of 10 randomly selected members of the girls' dance team and 10 randomly selected of the girls' volleyball team Based on the interquartile ranges of the two sets of data, which is a reasonable conclusion concerning heights of the players ...
March 31, 2013

math- Reiny can you help
can you help with the above question
March 31, 2013

math- please help
Here is the height, in inches, of 10 randomly selected members of the girls' dance team and 10 randomly selected of the girls' volleyball team Based on the interquartile ranges of the two sets of data, which is a reasonable conclusion concerning heights of the players...
March 31, 2013

math
Here is the height, in inches, of 10 randomly selected members of the girls' dance team and 10 randomly selected of the girls' volleyball team Based on the interquartile ranges of the two sets of data, which is a reasonable conclusion concerning heights of the players ...
March 30, 2013

7th grade math
A restaurant donates 2 cans of soup to charity for every 9 bowls of soup it sells. The number of cans of soup donated by the restaurant is proportional to the total number of bowls of soup sold. Which equation represents the relationship between b, the number of bowls of soup ...
March 29, 2013

Public Speaking
For communication to take place, there has to be: A. transmission of the message. B. medium. C. sharing of meaning. D. absence of noise. is it A is incorrect cause that's wat i had i think is B Which is NOT a benefit of studying public speaking? A. Creates good first ...
March 28, 2013

Public Speaking
Which is NOT a benefit of studying public speaking? A. Creates good first impression on others B. Communicates competence C. Proves our expertise D. Develops our ability to communicate ideas and message clearly and with impact correct ans: c
March 28, 2013

Calculus
does the sum 3/(2^(n)-1) converge or diverge? n=1--->infinity
March 26, 2013

Calculus
Is the series 2/ln(n) convergent or divergent? n=3 to n=infinity
March 26, 2013

Calculus
Is the series 1/(n(n+1)) convergent? n=2 to n=infinity
March 25, 2013

math
Find the base of a triangle whose area is 60in squared and whose height is 6 inches I did 1/2 bh=A 60=3b so b=60/3 b=20 then check so A=1/2bh A=1/2(20)6 A=1/2(120) A=60in squared is this correct?
March 17, 2013

world history
Any ideas to build a hippodrome for a school project
March 16, 2013

Physics...PLZ!! =)
A conducting rod whose length is 25 cm is placed on a U-shaped metal wire that has a resistance R of 8 Ù. The wire and the rod are in the plane of the paper. A constant magnetic field of strength 0.4 T is applied perpendicular and into the paper. An applied force moves ...
March 12, 2013

Physics
A 200-loop coil of cross sectional area 8.5 lies in the plane of the paper. Directed out of the plane of the paper is a magnetic field of 0.06 T. The field out of the paper decreases to 0.02 T in 12 milliseconds. (a) What is the magnitude of the change in magnetic flux ...
March 12, 2013

Physics
A 50-cm wire placed in an East-West direction is moved horizontally to the North with a speed of 2 m/s. The Horizontal and Vertical components of the earth's magnetic field at that location are 25 ìT and 50ìT respectively. What is the emf between the ends of ...
March 12, 2013

chemistry
If 5.30mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of 0.1000 M HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram?
March 3, 2013

math
You must be doing the same worksheet we are doing right now. :) Why can't I do first grade math?
February 28, 2013

Math
Ha ha ha Steve!! That's about as far as I got too! It was supposed to end up $400. No idea how though.
February 27, 2013

Math
Mr Shea saved $2500 in April. His monthly salary is two times the amount he saved in April. In May, he saved a certain amount of money. He spent $4200 more than the amount he saved. How much did he save in May? Please explain in easy to understand equations. I am ...
February 27, 2013

Math
Mr Shea saved $2500 in April. His monthly salary is two times the amount he saved in April. In May, he saved a certain amount of money. He spent $4200 more than the amount he saved. How much did he save in May? Please explain in easy to understand equations. I am ...
February 27, 2013

Physics--PLZ HELP!
Thanks! I did and originally got E)north magnetic pole but....now I'm second guessing myself that it is D)South magnetic pole..????!?!?!?
February 26, 2013

Physics--PLZ HELP!
When the switch is closed in a circuit, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is ---- -- -- -- -- -- -- A) a magnetic dipole. B) not contributing to the wire's deflection. C) a ...
February 26, 2013

Calculus
find the limit as x approaches 0 (arcsin x)/x
February 20, 2013

calculus
Use the shell method to find the volume of the solid formed by rotating the region bounded by y=x^3, y=0, x=0, and x=2 about the line x=3.
February 4, 2013

Calculus
Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis
February 4, 2013

Physics
A parallel-plate capacitor is charged by a battery and then the battery is removed and a dielectric of constant K is used to fill the gap between the plates. Inserting the dielectric changes the energy stored by a factor of A)2. B)1/K. C)1 (no change). D)K. E)K-1.
February 3, 2013

physics - conceptual
Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry? A)9Q B)Q/3 C)Q D)3Q E)Q/9
February 3, 2013

Physics -conceptual
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. Which capacitor has the greatest voltage?
February 3, 2013

math
how tall would a statue of a 5 foot 6 inch woman be if the scale for the statue is 1 foot 8 inches
February 3, 2013

calculus
Use the shell method to find the volume of the solid formed by rotating the region bounded by y=x^3, y=0, x=0, and x=2 about the line x=3.
January 30, 2013

calculus
Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis.
January 30, 2013

Algebra
The price of a printer was reduced from 400 to 280. What was the percentage decrease?
January 30, 2013

calculus
Find the area of region bounded by the curves y=sin(pi/2*x)and y=x^2-2x.
January 30, 2013

Calculus
Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis.
January 30, 2013

Math
Can u give me the answers to # 5-12 and 2,4
January 29, 2013

Consumer Math
Can you please check my answers:) 1. John Gray bought a basic car for $8,250.00, with options that cost $324.00. There's a 6% sales tax in his state and a combined $50.00 license and registration fee. What was John's total cost? A. $9,138.44 B. $10,000.00 C. $9,141.44 ...
January 28, 2013

Math
Can you please check my answers:) 1. John Gray bought a basic car for $8,250.00, with options that cost $324.00. There's a 6% sales tax in his state and a combined $50.00 license and registration fee. What was John's total cost? A. $9,138.44 B. $10,000.00 C. $9,141.44 ...
January 28, 2013

Math
2x-3y=6 I did +3y 2x=6+3y 1/2 to both sides(2x=3y/2+6) x=3/2y+6 or does the 1/2 go under the hole equation 0f3/2y+6 making the answer x=3/2y+3 Thanks
January 21, 2013

algebra
A total of $15,000 is invested into two accounts. One of the accounts earns 12% per year and the other earns 10% per year. If the total interest earned in the first year is $1600, how much is invested in each account? 1.) Define the variable(s) and what they stand for. 2.) Set...
January 18, 2013

math
in rhombus abcd the measure in inches of ab is 5x+7 and dc is 2x+25 find the number of inches in the length of dc
January 11, 2013

algebra
Factor the polynomial expression. If necessary, use the caret (^) to enter exponents. For example, write x2 as x^2.2x2 + 13x + 15
January 9, 2013

Math
I want to open a savings account that earns 1.6% simple interest yearly. I want to earn exactly $288 in interest after 3 years. How much money should I deposit?
January 8, 2013

Math
A maker of a cubic number blocks packs a rectangular box so that there are 8 blocks along one edge, 10 blocks along the second edge, and 4 blocks along the third edge. How many blocks will be shipped in this box
January 6, 2013

calc arc length
Find the length of the arc along f(x) = integral from 0 to x^3 sqrt(cos t) dt on the set of x [0, pi/3].
December 19, 2012

Math
x^2-4x-32 / x^2-20x-96 how do you simplify this?
November 29, 2012

structure and function of the human body
What is the importance of ATP? explain where carbohydrate metabolism occurs in the cell, what additonal ingredient is needed and what waste product is produced in this process?
November 27, 2012

physics
A ball is thrown horizontally from the top of a building 17.6 m high. The ball strikes the ground at a point 67.7 m from the base of the building. The acceleration of gravity is 9.8 m/s^2 1. Find the time the ball is in motion. Answer in units of s. 2. Find the initial ...
November 19, 2012

physics
A ball is thrown horizontally from the top of a building 17.6 m high. The ball strikes the ground at a point 67.7 m from the base of the building. The acceleration of gravity is 9.8 m/s^2 Find the time the ball is in motion. Answer in units of s
November 19, 2012

Chemistry
N2(g)+3H2(g) -> 2NH3(g)+ 22000 cal Consider the reaction is at equilibrium. Explain how the equilibrium is shifted when a. more N is added b. more H is added c. ammonia is removed
November 12, 2012

Chemistry
What is the pH of a solution prepared by mixing 10 mL of 0.10 M NH3 and 5.0 mL of 0.24 M NH4+. Assume Ka(NH4+) = 5.56 x 10^-10
November 11, 2012

Precalc/Trig
evaluate the expression assuming that cos(x)=1/7, sin(y)=1/3, sin(u)=2/5 and cos(v)=1/3. what is cos(u+v)? sin(x-y)? and tan(u-v)?
November 10, 2012

Math
I got 28.3
November 8, 2012

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