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Homework Help: 12th Grade

12th grade
would you expect an H2Se molecule to have a shape similar to that of water? Give a reason for your answer?
Wednesday, February 17, 2010 by pv

12th grade
Tuesday, February 16, 2010 by Anonymous

12th grade economics
how might opportunity cost help to explain tha pattern of international trade?
Sunday, January 24, 2010 by muz

12th grade
i need information about the virginia plan but it has to be more on a college levle
Saturday, January 23, 2010 by Maegan

12th grade
which of the following contributed most to the fish population dying during the 1970's
Wednesday, January 20, 2010 by science

12th grade English
I need to write a one page response essay to the quote "you can no more win a war than you can an earthquake"..........please help! Not good at writing. Thank you
Tuesday, November 17, 2009 by Anonymous

12th grade
How do I teach Paradox to my fellow classmates? what activities can I do to involve them while I;m teaching?
Thursday, November 12, 2009 by Kahmaria

12th grade Economics
Describe the automotive Industry- How does the company answer the basic economic questions?
Tuesday, November 10, 2009 by Aubrey

12th grade Trig
sec theta = 2, sin theta is less than 0. I'm not sure what to do? Please explain. Thank you.
Monday, November 9, 2009 by Loyda

12th grade Politics
United States is the only sizable industrialized country that does not have a socialist party as a major source of power. Why is this??? Can someone please give me some points or reasons??? Thank you!!
Wednesday, November 4, 2009 by Anonymous

12th grade Physics
Determine the x and y components if a dog walks to the park that is 24m, 30 degrees northwest. Please help i don't know how to go about solving this problem
Wednesday, November 4, 2009 by Allison

12th grade Advanced Functions
A generator produces electrical power, P, in watts, according to the function: P(R)= 120/ (0.4 + R)^2 where R is the resistance, in ohms. Determine the intervals on which the power is increasing.
Sunday, October 25, 2009 by Anonymous

12th grade Physics
how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?
Saturday, October 24, 2009 by Jane

12th grade
Need help on the book of beowulf- what it the evil between the two religions christian and pegeon.
Monday, October 12, 2009 by Eric

12th grade government
How does the new class differ from more traditional elites in its political attitudes?
Sunday, October 11, 2009 by Anonymous

12th grade english
i cant figure out how to put cordon in a sentence if the definition is *a cord or braid worn as a decoration* please help!
Wednesday, September 30, 2009 by thumper09

11th grade u.s. history
Im doing a project on the 12th amendment but im having a hard time finding the questions ive been working this for like well dis will be my 5th day working on it im not good at finding stuff on the internet anyway i have to find out why was the 12th amendment necessary,what ...
Monday, September 28, 2009 by A

12th grade
Does knowledge acquired in highschool liberate or hinder students? Please help explain the question and your opinion.
Saturday, September 26, 2009 by eng

12th grade
According to the social contract theory, the contract is
Wednesday, September 16, 2009 by Monica

12th grade
is there any sites that can you can suggest for an essay that I'm doing on how young people who believe in their words and ideas can change our world?
Wednesday, September 9, 2009 by michelle

12th grade A.P. Economics
Compare the mixed economies of various nations along a continuum between centrally planned and free market systems.
Saturday, September 5, 2009 by Ami

12th grade expository writing
Can somebody help me with writing?
Thursday, August 20, 2009 by unclandy

12th grade history
Which groups of people were not afforded all the rights stated in the bill of rights?
Thursday, August 13, 2009 by jesseka

12th grade AP Economics
Why might an economist look at the hundreds of cars moving along an assembly line an say, “ There is an example of scarcity”?
Thursday, August 6, 2009 by Anonymous

12th grade
the voting right act of 1965 specially removed from voting in the U.S.
Wednesday, July 15, 2009 by Anonymous

12th grade
which does suzuki in "hidden lessons" explore more thoroughly, the causes of children's negative or positive attitudes toward nature or the effects of these attitudes?
Tuesday, July 14, 2009 by Anonymous

12th grade English
How does Saki in "The image of the lost soul" use descriptions of places to reach desired effect in story? Can anyone tell me how? an example form the text would be helpful
Thursday, July 2, 2009 by Derek

12th grade AP Economics
Making a list of what you would consider the most important trade-offs of spending more money on air-travel safety. Can someone please help me!!!
Wednesday, July 1, 2009 by Anonymous

12th grade
How much current flows in a 12 watt rad?io connected to a 120-Volt circuit
Monday, June 29, 2009 by anonymous

12th grade
Penn Foster Examination #93051 Cooking Appliances I've gotten 16 out of 25 completed but I'll just post the whole exam to make sure I have THOSE right. Thanks for your help guys!
Saturday, May 23, 2009 by Daniel

12th grade- Trigonometry
Find the exact value of each expression Cos^-1(0) Tan^-1 sqrt(3)/3 Sin^-1(1) Since the expressions are capitalized, I'm not sure if I have to do anything different. Any help is appreciated.
Thursday, May 14, 2009 by Kate

12th grade chemistry
Calculate the number of grams in the following :[149.096 g/mole] 8.55 moles of (NH4)3PO4 IT WOULD BE NICE IF I CAN GET STEP BY STEPS TO GET ANSWER !!!
Monday, March 30, 2009 by Janice

12th grade
Ode on a Grecian urn What does "all breathing human passion far above" mean in line 28?
Tuesday, March 3, 2009 by Anonymous

12th grade
what mass of copper may be produced when excess CuSO4 is reacted with 100g of aluminum metal?
Monday, February 23, 2009 by carson

12th grade
whick is a positive connotaion of the word inactive? a)lazy B)passive C)relaxed d)slacked
Friday, February 20, 2009 by kayla

12th grade
Write the chemical equation for Sulfiric Acid and potassisum sulfate the product is potassium sulfate and water.
Monday, February 16, 2009 by Liz

12th grade
List 3 problems of Decentralized power that existed under the Articles of Confederation. For each problem, identify one solution that the Constitution provided to address the problem.
Thursday, February 5, 2009 by K

12th grade bio
The transition of the lips where the outer skinner and inner mucous membrane meet is called the _________ I looked it up and from what I read I believe it is the gingivae. Would that be correct. Thank you
Thursday, February 5, 2009 by ali

12th grade
A particle starts at x=0 and moves along the x-axis with velocity v(t)=2t+1 for time t is less than or equal to 0. Where is the particle at t=4?
Tuesday, January 6, 2009 by Barbara

12th grade history
Why did the Roman Catholic reform leaders believe that the fundamental aspect of improving the Church was to enhance the performance of the clergy?
Wednesday, December 17, 2008 by Julie

12th grade (Law)
Could you tell me some information about NATO? I have to do a project for my law course and need to know how it impacts the world.
Monday, December 15, 2008 by Ashley

12th grade chemistry!!
Where on the periodic table would you find elements that ionize to form cations and anions?????
Sunday, December 7, 2008 by courtney

12th grade calculus
a marathoner ran the 26.2-mi New York City marathon in 2.2h. show that at least twice, the marthoner was running at exactly 11 mph
Thursday, November 6, 2008 by ee

12th grade calculus
Let f(x)=[x^3-9x] [] --- absolute value a. does f'(x) exist? b. does f'(3) exist? c. does f'(-3) exist? d. determine all extrema of f.
Tuesday, November 4, 2008 by dt

12th grade calculus
find the lines that are tangent and normal to th ecurve at the point given 1. 2xy+piesiny=2pie (1, pie/2) 2. x^2cos^2y-siny=0 (0, pie)
Sunday, October 19, 2008 by elley

12th grade calculus
find the derivative of y with respect to the appropriate variable. y=sin^-1ã2t ã =radical
Sunday, October 19, 2008 by dt

12th grade calculus
find the lines that are (a) tangent and (b) normal to the curve at the given point x^2 + xy - y^2 = 1
Sunday, October 19, 2008 by dt

12th grade
How is the structure of the female and the male reproductive system suitable for their functions? Please reply soon!!! Thanks.
Thursday, October 16, 2008 by Crystal

12th grade
I'm having trouble ordered triple in algebra 2 w/ trigonometry, could someone please hellllllllllllllllllp me!
Monday, October 13, 2008 by She'koyea

12th grade Math?
How would you factor 3x^3-4x^2+4x-1? P.S. Factor theorem does not work here.
Sunday, October 12, 2008 by BioBabe

12th grade Physics
In an experiment, a car taveling at 88m/s,west slams into a wall and comes to a halt in 0.75 seconds. What is the car's acceleration vector?
Tuesday, October 7, 2008 by Jane

12th grade
Think of a business in your local area. Describe its operation in terms of factor markets and product markets.
Sunday, September 21, 2008 by Esmeralda

12th grade
In statistic: How to construct a duble steam display for the minutes it took the mailperson to deliver mail as listed: 80 68 56 64 69 70 64 70 62 73 69 82 62 58 63 65 67 54 71 61 67 75 70 66 62 73 59 58 78
Saturday, September 20, 2008 by russ

12th grade math!!!
what is the prime power factorizatopn of 554 706 758 514 844 830 788 677
Wednesday, September 17, 2008 by chris

12th grade Science
A bud covers the bloom but when it erupts it holds up the flower from underneath find the name it’s divided into together and alone? -thanks-
Wednesday, September 10, 2008 by Nancy

12th grade
Which one of the following items is an example of a symbol in "Bernice Bobs Her Hair
Wednesday, September 10, 2008 by kita

12th grade
Given that x is an inetger, state the relation representing each equation by making a table of values. y=3x+5 and -4<x<4
Wednesday, September 3, 2008 by Liz

12th grade
Why is it difficult to recognize the worth and dignity of all individuals at all times?
Wednesday, September 3, 2008 by chris

12th grade
determine the number of ways arranging the letters in the word handle if there are no restrictions?
Thursday, August 28, 2008 by Linda

12th grade government/economics
If no candiate for the presidency wins a simple majority of the total number of electoral votes, what body has the power to choose the president?
Sunday, August 24, 2008 by Cristina

12th grade government/economics
The Constitution specifies a three-fourths marjority for just one process. what?
Sunday, August 24, 2008 by Cristina

10th grade math
1.548937075 x 10 to the 12th. round the number to 3 significat figures. I thought I would respost this because the other one was getting confusing
Tuesday, August 19, 2008 by Rebekah

The students at Millerville High School were surveyed about their favorites type of music. The results are in the table. to the nearest whole percent, what percent of the students who chose country as their favorite are in 9th grade? a.63%,b.39%,c.24%,d.20% Favorite type of ...
Friday, May 20, 2016 by marilyn

12th Grade
Someone help me!! square root = sqrt (5x^2-5x-10)sqrt(x+7) + (2x+6)sqrt(x+2) >= x^3+13x^2-6x-28
Tuesday, May 10, 2016 by Athenal

12th Grade
Someone help me!! square root = sqrt (5x^2-5x-10)sqrt(x+7) + (2x+6)sqrt(x+2) >= x^3+13x^2-6x-28
Tuesday, May 10, 2016 by Athenal

Math - PreCalc (12th Grade)
The function f(x) = 6x + 5 is defined over the interval [-1, 4]. If the interval is divided into n equal parts, what is the value of the right end point of the first rectangle?
Friday, March 21, 2014 by Shawna

Math - PreCalc (12th Grade)
How many 4-digit numbers are possible if the hundreds digit is 8 and if repetition of digits is allowed? A) 100 B) 1,000 C) 9,000 D) 900 E) 1,800
Friday, March 21, 2014 by Shawna

Math - PreCalc (12th Grade)
The function f(x) = x2 − 5 is defined over the interval [0, 5]. If the interval is divided into n equal parts, what is the area of the kth rectangle from the right? A) [(2+k(5/n))^2+5](5/n) B) [(k(3/n))^2−5](5/n) C) [(k(5/n))^2+5](5/n) D) [(k(3/n))^2+3](5/n) E) [(k...
Friday, March 21, 2014 by Shawna

Math - PreCalc (12th Grade)
The function f(x) = 2x + 1 is defined over the interval [2, 5]. If the interval is divided into n equal parts, what is the value of the function at the right endpoint of the kth rectangle? A) 2+3k/n B) 4+3k/n C) 4+6k/n D) 5+6k/n E) 5+3k/n
Friday, March 21, 2014 by Shawna

Math - PreCalc (12th Grade)
If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1? A) (k(5k − 3)/2)+ 5k + 1 B) (k(5k − 3)/2)+ 5k − 4 C) (k(5k − 3)/2)+ 5k + 2 D) (k(5k − 3)/2)+ 5k − 3 E) (...
Thursday, March 20, 2014 by Shawna

Math - PreCalc (12th Grade)
What value must be defined for f(4) to remove the discontinuity of this function at x=4? f(x)=(x^2−16)/(x−4) A) 0 B) 4 C) -4 D) 8 E) -8 f(4)=(4^2−16)/(4−4) f(4)=0/0 you can't divide by zero. I don't understand the question.
Thursday, March 20, 2014 by Shawna

Math - PreCalc (12th Grade)
If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? A) Sn = n(n − 1)/3 B) Sn = n(2n − 1)/3 C) Sn = n(n + 1)/3 D) Sn = n(n + 1)(2n + 1)/3
Thursday, March 20, 2014 by Shawna

Math - PreCalc (12th Grade)
What does this function show at x = 5? f(x)=x^2−25/x−5 A) removable discontinuity B) jump discontinuity C) infinite discontinuity D) continuity E) none of the above
Wednesday, March 19, 2014 by Shawna

Geometry/Algebra 1/12th grade
Find the value of x. Round u'r answer to the nearest hundredth, if necessary. Area of triangle=108m^2 A=1/2 bh b=(x+6)m h=xm So, 108m^2=1/2 ((x+6)m)(xm) 108m^2=1/2 m^2+x^2+6???? If so then what? Sub m^2 from the left side?? Then what? :/
Friday, August 30, 2013 by Help now please

Adv Chem 12th grade
4. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. • RbF • CuO • (NH4)2C2O4 (Note: C2O4– is called oxalate.)
Wednesday, December 19, 2012 by Taylor

The volleyball court -if it id 80 ft long and 50 ft wide, how would you find the dimensions of the court? Explain please! Remember that I am a 6th grader. Please don't give me a 10-12th grade answer.
Monday, September 24, 2012 by D

12th grade math
a block of mass 77kg is placed at the top of a frictionless plane that is inclined 46degrees to the horizontal. The height of the plane is 23 meters. find the speed of the block at the bottom of the plane. Show the steps please, -thanks
Monday, June 11, 2012 by frusterated

Write a program that asks the user to input a grade that he or she received on an exam. The grade is an integer from 0 to 100 inclusive. The program should convert the numeric grade into the equivalent letter grade. Do the conversion by using a function Letter_Grade () that ...
Friday, May 18, 2012 by jermaine

Physics(12th grade)
When the temperature of a gas in a vessel is increased by 1C then the pressure is increased by 0.5%. what will be its initial temperature?
Monday, April 9, 2012 by Tulika

Physics (12th Grade)
In a certain process 500 cal of heat is given to a system and the system does 100J of work. What will be the increase in internal energy of the system?
Monday, April 9, 2012 by Tulika

Physics (12th Grade)
The isothermal bulk modulus of elasticity of a gas is 1.5 * 100000 N/m^2. What will be its adiabatic bulk modulus of elasticity? Given the ratio of Cp/Cv=1.4
Monday, April 9, 2012 by Tools

Physics (12th Grade)
The isothermal bulk modulus of elasticity of a gas is 1.5 * 100000 N/m^2. What will be its adiabatic bulk modulus of elasticity?
Sunday, April 8, 2012 by Tools(plz help its really urgent)

On a map of downtown, 12th street is perpendicular to Avenue J. The equation y=-4x+3 represents 12th street. What is the equation representing Avenue J if it passes through the point (8,16)?
Thursday, January 5, 2012 by jackson

12th grade physics
A person pulls a wagon through thick grass with a force of 800 N. The angle that the handle makes with the ground is 35. How much force moves the wagon forward?
Monday, September 26, 2011 by Kayin

Physics 12th grade
A farm tractor is pulling 2 pieces of equipment east, with each piece of equipment 25 north and south of the x axis. If it takes 50,000 N of force on each chain to keep the equipment moving, then what is the total force of the tractor in the x direction?
Monday, September 26, 2011 by George

Calculus 12th grade.
1. A body is moving along a straight line with a velocity which varies according to the equation v=9t^2+2t, where v is in feet per second and t is in seconds. Find the expression for the distance as a function of time. A. 3t^3+t^2+C B. 3t^3+2t^2+C C. 18t+C D. 20t+C My answer ...
Saturday, March 5, 2011 by anon

12th grade Trigonometry
Solve this trigonometric equation.give all positive values of the angle between 0deg and 360deg that will satisfy. Give any approximate value to the nearest minute only. 3 sin theta - 4 cos theta = 2
Friday, March 4, 2011 by anon

12th grade, Advance Algebra
How to press the value of log, to evaluate log, to find the unknown log using EL-531WH, advance D.A.L
Sunday, February 27, 2011 by Eunthin

12th grade chemistry
If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)
Thursday, January 27, 2011 by Matt

Physics 12th Grade
An archer puts a 0.34 kg arrow to the bowstring. An average force of 220 N is exerted to draw the string back 1.3 m. Assume that air resistance is negligible. If the arrow is shot straight up, how high does it rise? I am confused at how to find the distance that it will rise.
Wednesday, January 5, 2011 by Sarah

12th grade
one type of probability used everyday is: a)experienced probability b)scientific probability c)frequency of occurence d)none of the above
Wednesday, December 15, 2010 by david

12th Grade Calculus
Find d^2y/dx^2 by implicit differentiation. x^(1/3) + y^(1/3) = 4 I know that first you must find the 1st derivative & for y prime I got 1/3x^(-2/3) + 1/3y^(-2/3) dy/dx = 0 Then for dy/dx I got dy/dx = [-1/3x^(-2/3)] / [1/3y^(-2/3)] I think that from here I would use the ...
Tuesday, December 14, 2010 by Liz

12th grade
Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 40 kg boy weigh on the moon? (Round answer to nearest tenth.)
Thursday, December 9, 2010 by Jenna

12th grade
on the "aster flower." What time of year might be symbolized by the aster flower and the other images of plant life found in the poem? How do these images contribute to the overall mood of the poem?
Monday, November 8, 2010 by LoLo

12th grade PYSICS
A 45.7-kg boy on a swing moves in a circular arc of radius 3.80 m.At the lowest position, the child's speed reaches 2.78 m/s. Determine the magnitude of the tension in each of the two vertical support chains. i used mv^2/r, but i keep getting the answer wrong. the answer is ...
Sunday, November 7, 2010 by Samii

12th grade
Solve & plot a graph for the following: F(X)=cos(X)-cos to second power X for the interval negative pi greater than or equal to X less than or equal to positive pi
Saturday, November 6, 2010 by Alex

12th grade
Wheat is falling from a chute onto a level floor at a rate of 8pi ft3/min to form a conical pile. If the height of the pile is always equal to the radius of its base, at what rate is the radius increasing when the pile is 8 ft deep?
Saturday, November 6, 2010 by Nazish

12th grade
You're riding on a train that's moving at 50 km/h, and you roll a ball down the aisle at 2 km/h in the same direction as the train is moving. If a person standing on the ground near the train track could see the ball, how fast would it appear to be moving?
Tuesday, November 2, 2010 by Anonymous

12th grade (physics)
a car with bad shock absorbers bounces up and down with a period of 0.731s after hitting a bump. The car has a mass of 1850kg and is supported by four springs of equal force constant k. Determine a value for k. Answer in units of N/m. if you can, could you explain how to get ...
Thursday, October 28, 2010 by April

12th grade
A cubic box of volume 4.0 multiplied by 10-2 m3 is filled with air at atmospheric pressure at 20°C. The box is closed and heated to 160°C. What is the net force on each side of the box?
Wednesday, October 20, 2010 by Bodi

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