April 20, 2014

Homework Help: 12th Grade

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12th grade
prove that normal to plane containing 3 points whose position vectors are a vector,b vector,c vectorlies in direction addition of cross product of vectors b and c and cross product of vectors c and a and cross product of vectors a and b
Tuesday, September 22, 2009 at 9:54am

3rd grade
grade 1 215 grade 2 186 grade 3 259 how many more were sold bt grade 3 than by grade 2? 73 answer why aren't any of the tens regrouped to subtract the ones?
Monday, September 14, 2009 at 4:11pm

12th grade LAW
You're right. With traffic laws, we can drive our cars safely. We can be safe in our homes, knowing that the law is on our side and police are close by. Mandatory education laws assure that every child goes to school. I'm sure you can think of additional examples.
Thursday, September 10, 2009 at 10:30pm

12th grade A.P. Economics​ter
Monday, August 17, 2009 at 12:30pm

12th grade
This act made it illegal to require a literacy test in order to vote.​ts_Act
Wednesday, July 15, 2009 at 5:14pm

12th grade Social Science
Can anyone help me with these questions? How was the culture of the Baby Boom so different from that of previous generations? Why are members of Generation X frustrated with Baby Boomers? What are some of the important impacts of Generation Y on the economy? What are the main ...
Monday, July 6, 2009 at 2:17pm

12th grade- Social Science
Men who are more socially isolated are more likely to abuse their wives than are men who are socially integrated. Can you not do this topic because I just need an example of another topic in the format above.
Friday, July 3, 2009 at 1:20pm

12th grade- Social Science
I need help in making a hypothesis statement for a certain topic, I chose at school. Can anyone give me an example of one? Here is the format, my teacher wants: (The - represents the boxes, he put for each) TOPIC: - - OVERVIEW OF TOPIC: A brief description about your topic...
Friday, July 3, 2009 at 1:08pm

12th grade
Jacob's answer explains it better, but there is an equation you can use. Tt = 1/T1 + 1/T2 where Tt is total time, T1 is the first person's time, and T2 is the second person's time (this can be carried out as far as needed, such as by adding a 1/T3 term, and a 1/T4 ...
Friday, May 1, 2009 at 1:30am

12th grade
Okay I am doing a report on Thurgood Marshall. I am to a part where I am writing a little about his presidential nominations. Please help me on this! What exactly is a second court of appeals judge's job? What about a Supreme Court Justice? I am trying to say maybe a ...
Wednesday, April 29, 2009 at 9:28pm

12th grade
how to fid g(4), g'(4) and g''(4) when graph of the function f shown above consist of six line segments. Let g be the function given by g(x))=___ f(t) dt. The ___ is form like f with an x variable at the right top corner and a 0 in the right low corner.
Thursday, April 23, 2009 at 12:48am

12th grade
it takes bill 4 hours to paint a house. it takes john 7 hours to paint the same house. how long does it take to paint the house if they painted it together.
Thursday, April 9, 2009 at 9:18am

12th grade chemistry
Dang it! I did not know what the :[149.096 g/mole] meant until I looked back again. Apparently they gave your the total mass of the compound! I went through and did all that work for nothing! Anyways your answer should not be off by much, but if you it to be as accurate as the...
Monday, March 30, 2009 at 6:40pm

12th grade chemistry
First add up the molarity of your compound 3N= 42.0201 12H = 12.09528 P= 30.97376 4O = 63.99600 Add those number up and you should get 149.08 (I rounded). (8.55mole) * (149.09g/1mole) = ??
Monday, March 30, 2009 at 6:38pm

12th grade
Map of Wazir Akbar Khan district of Kabul – create a map with three-dimensional aspects that includes (but not limited to) Amir’s home, Ali’s quarters, Ghargha Lake, the cemetery (pomegranate tree), bazaar, Cinema Zainab, Kabul River, bus station, kite maker&#...
Monday, February 23, 2009 at 10:49am

12th grade
By defintion a *confederacy* is a form of government in which political power rests with the smaller unit divisions and the overarching power of a central legal authority is deemphasized. The *federal* constitution divided legal authority between the states and the national ...
Thursday, February 5, 2009 at 11:23pm

12th grade Chemistry
M = mols/L of solution. mols Fe(NO3)3 = M x L, then M = mols/total L (11 mL or 0.011 in this case). OR another way, is dilution, 0.002 x 5/11 = ?? 0.003 x 3/11 = ??
Sunday, January 11, 2009 at 8:11pm

12th grade
I think you misstated the problem. Is it really "A particle starts at x=0 and moves along the x-axis with velocity v(t)= 2t+1 for time t GREATER than or equal to 0. Where is the particle at t=4?" ? If so, position is the integral of velocity from t=0 to t = 4. That ...
Wednesday, January 7, 2009 at 1:43am

12th grade
barbara, you originally asked for position at time 4 for a function that has a certain velocity function before time zero. One cant calculate postition for time 4 unless there is some indication of what it was doing between time zero and time 4.
Tuesday, January 6, 2009 at 9:46pm

12th grade
The problem asks for postion at time 4, which is outside the time given for the velocity expression, if you typed it correcty. One needs the velocity function for time zero to somewhat beyond 4 to calculate postion.
Tuesday, January 6, 2009 at 9:42pm

12th grade (Law)
Monday, December 15, 2008 at 9:25pm

12th grade Math-statistics
The folowing calculator link might help:
Saturday, December 13, 2008 at 11:11am

12th grade Math-statistics
The annual sales, in millions, for 28 toy department stores is listed. A)Calculate the mean and standard deviation of the data. Answer to the nearest tenth. B) Calculate the percent of sales to the nearest whole number, that are: i)within one SD of the mean ii)within two SD of...
Friday, December 12, 2008 at 11:22pm

12th grade calculus
Let x be the number on the tour Profit = Revenue - Cost x[200 - 2(x-50)] - 6000 - 32x 50 > x > 80 For maximum profit, dP/dx = 200 - 4x + 100 -32 = 0 4x = 268 x = 67
Tuesday, November 18, 2008 at 11:44pm

12th grade chemistry
A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL sample required 31.0 mL of a 0.0185mol/L solution of potassium dichromate. Calculate the percentage of iron in the wire.
Monday, November 10, 2008 at 4:45pm

12th grade calculus
show that the solution has exactly one solution in the interval x+ln(x+1)=0, 0<and equal to x <and equal to 3
Thursday, November 6, 2008 at 8:15pm

12th grade calculus
find points on the curve x^2+xy+y^2=7 (a) where the tangen is parallel to the x-axis adn (b) wehre the tangent is parallel to athe y-axis. (in this case, dy/dx is not defined, but dx/dy is. what value does dx/dy have at these point?)
Sunday, October 19, 2008 at 8:13pm

12th grade calculus
Take the differential... 2xdx+ y dx + x dy -2ydy=0 solve for dy/dx Then use that as m in y=mx + b Puttingin the x,y point, solve for b. then, for the normal, take the negative reciprocal of m, and again, solve for the line y=-1/m x + b
Sunday, October 19, 2008 at 7:58pm

Absolutely education is a government issue. Since we have free public education through 12th grade, the government must fund it and exercise some control over it. Education is funded by federal, state, and local governments. However, with money tight, schools don't receive...
Sunday, October 19, 2008 at 7:06pm

social studies (5th grade)
Jiskha Homework Help THURSDAY October 16, 2008 SCHOOL SUBJECTS - Art - Business - Computers - Download - English - Foreign Languages - Health - Home Economics - Instrumental - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten...
Thursday, October 16, 2008 at 6:16pm

12th grade Math?
Look for the first root by trial and error. Using the "q/p theorem", I see that one solution is +1/3. So, (x - 1/3) is one factor. Divide that into 3x^3-4x^2+4x-1 to get a quadratic factor, (3x^2 -3x +3) = 3 (x^2 -x +1). The term in parentheses can be factored by the...
Monday, October 13, 2008 at 2:34am

12th grade Physics
I will be happy to critique your thinking on this. acceleartion=(finalveloicty-initialveloc​ity)/time keep directon in those velocities. average velocity=(finalvelocity+initialvelocity)​/2 distance=average velocity * time.
Tuesday, October 7, 2008 at 7:00pm

12th grade Physics
A bird accelerates from 5 m/s,north to 25 m/s,north in 4s. A) What is the bird's acceleration vector? B) How far and in what direction does the bird travel in this interval? C) What is the bird's average velocity?
Tuesday, October 7, 2008 at 6:58pm

12th grade
Hey I have an exam tomorrow and I cant understand this things.. Help me please .. 1: Derivative using the limit concept 2: Determine a Derivative using the theorems. 3:Evaluate velocity at the beginning and at the end 4: Using implicit derivation and find the normal and the ...
Tuesday, October 7, 2008 at 12:28am

12th grade Physics
first stone: .44=1/2 g t^2 second stone: .44=v(t-1)+1/2 g (t-1)^1 use equation 1) TO solve for t, then put it in equation 2) and solve for v.
Wednesday, October 1, 2008 at 8:38pm

12th grade Physics
A stone is dropped in water from a bridge 44 cm above the water. Another stone is thrown straight down 1.0 s after the first one dropped. Both strike the water at the same time. What was the initial speed of the second stone?
Wednesday, October 1, 2008 at 8:32pm

12th grade
I am stuck on my thesis statement. I am to write a paper about my strengths and weaknesses as a writer. Topic: writer Point:strenghts and weaknesses examples so far The following are my strengths and weaknesses as a writer. I will discuss my strenghts and weaknesses as a writer.
Tuesday, September 30, 2008 at 7:52pm

12th grade
However, the departure from this view became evident with the ratification of the Sixteenth Amendment to the United States Constitution (income tax) as well as the Seventeenth Amendment to the United States Constitution (direct election of federal Senators). -Wikipedia
Sunday, September 21, 2008 at 8:40pm

12th grade
First of all, please do not use capital letters. They are much more difficult to read and in computer language, are considered "shouting" or, in other words, rude. Many volunteers will not even read your post, if it is in capital letters.
Monday, August 25, 2008 at 11:28pm

so 1/4 in fourth and 1/4 in fifth grade 1 = 2/5 * 400 = 2 * 80 = 160 grade 2 = 2/8 * 400 = 2 * 50 = 100 grade 3 = 1/10 *400 = 1 * 40 = 40 grade 4 = 1/8 * 400 = 1 * 50 = 100 grade 5 = 1/8 * 400 = 1 * 50 = 100 grade 2 is 2/8 which is 1/4 by the way, sme as grades 4 and 5
Monday, March 24, 2014 at 3:23pm

there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal amount)
Monday, March 24, 2014 at 3:14pm

Math - PreCalc (12th Grade)
or, to see the foci plotted,​i+of+%28y-2%29^2%2F9+-+%28x-2%29^2%2F16+​%3D+1
Monday, March 24, 2014 at 11:18am

Math - PreCalc (12th Grade)
First of all , I am sure you meant: s(t) = 2t^2 + 3t s(2) = 2(4) + 3(2) = 14 s(4) = 2(16) + 3(4) = 44 total distance = 44-14 = 30 m total time = 4-2 seconds = 2 seconds average velocity = total distance / total time = 30 m/2 seconds = 15 m/s
Friday, March 21, 2014 at 12:43pm

Math - PreCalc (12th Grade)
very similar to​5410253
Friday, March 21, 2014 at 11:47am

Math - PreCalc (12th Grade)
Use you "sense" of numbers to see what happens to the fractions as n gets larger. (I think your last term should read 15/(3n^2) or else it becomes large as n gets large) e.g. look at 5/n suppose n = 100,000, then 5/n = .00005 , which is close to zero suppose n = 1,...
Friday, March 21, 2014 at 11:46am

Math - PreCalc (12th Grade)
Which statement is true for any linear system of two equations in two variables? A) The system is independent if the slopes of the two lines are equal. B) The system is inconsistent if the y-intercepts of the two lines are equal. C) The system is independent if the graphs of ...
Thursday, March 20, 2014 at 12:24pm

Math - PreCalc (12th Grade)
Which combination of limit properties is required to evaluate this limit? lim x->((24/x)-2x+2)^3 A) sum, difference, product, root B) sum, difference, product, power C) sum, difference, quotient, power D) sum, difference, quotient, root E) A limit does not exist.
Thursday, March 20, 2014 at 12:24pm

Math - PreCalc (12th Grade)
it asks for the first natural number ... the natural numbers are 1,2,3,... So, start trying them: n=1: (2n-1) = 1 1 <= 4*1-1 1 <= 3? yes n=2: (2n-1) = 3 1+3 <= 4*2-1 4 <= 7? yes n=3: (2n-1) = 5 1+3+5 <= 4*3-1 9 <= 11? yes n=4: (2n-1) = 7 1+3+5+7 <= 4*4-1 ...
Wednesday, March 19, 2014 at 12:16pm

Math - PreCalc (12th Grade)
ok. so we have x + y + z = 15000 x = y + z + 3000 3x + 2y + 2z = 30000 Nope. That wasn't it. So, if #1 costs 3000 more than either #2 or #3, we have x + y + z = 15000 x = y + 3000 x = z + 3000 3x + 2y + 2z = 30000 No joy there, either. So, what about the choices? A: 3*9 + ...
Wednesday, March 19, 2014 at 11:20am

Suzan has a 69 as her grade in a class. If she does a quiz worth 9% of her grade what will her grade be?
Friday, March 7, 2014 at 11:13am

12th Grade Vocabulary Antonyms Practice
I don't know if there's any magic website for this, but if you have a list of words, think of at least one antonym for each one, and then look them up at to see if your antonyms are correct. Keep in mind that there are often more than one antonym for ...
Saturday, February 1, 2014 at 3:34pm

Chelle's solution gives the 12th term, but does not show the sum of all 12 terms, which was what was asked.
Friday, January 3, 2014 at 5:40pm

5th grade math
In the fourth grade class at Baker Elementary, 9 students are left-handed. The fifth grade has 7 left-handed students and the sixth grade has 6. The number of students in the fourth grade is 3 times the number of left-handed students in the class. The sixth grade has 3 more ...
Sunday, December 1, 2013 at 8:35pm

12th Calculus
help me!
Tuesday, November 19, 2013 at 2:15pm

12th grade MATH
Not even close. Not only is the algebra wrong, but x is not the answer to the question. (8+2x)(12+2x)=96+96 96+40x+4x^2 = 96+96 4x^2+40x-96 = 0 x^2+10x-24 = 0 (x-2)(x+12) = 0 x = 2 or -12 Naturally, -12 is not a possibility, so x=2 The frame is 2" wide, making the ...
Tuesday, October 8, 2013 at 12:16am

my book is racial and ethnic groups 12th ed. i have the pdf file but not sure where to look
Thursday, July 4, 2013 at 7:43pm

Quantitative Methods
What will be the 12th and 77th terms in the series 10, 12, 14, 16, ?
Friday, June 14, 2013 at 10:35am

Leila, Larry, and Cindy are running for 12th grade class offices. They will be named to the positions of president, vice-president, and secretary according to the number of votes each receives. The person with the most votes will be president, the person with the second-...
Thursday, May 9, 2013 at 3:01pm

12th grade goverment
It probably differed from one colony to another, but most likely the voters were men who owned property. They were considered to have stakes in the colonial government ... financial stakes.​l/spring07/elections.cfm
Tuesday, May 7, 2013 at 10:18am

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of the scores, a “B” grade to the...
Sunday, March 24, 2013 at 5:22pm

write 3.85 x 10 to the negative 12th in scientific notation
Tuesday, March 5, 2013 at 4:42pm

They might draw out 3 white, 2 black, 3 blue, and 3 red. After that, the 12th sock must be the same color as one of the others.
Monday, February 11, 2013 at 4:59am

12th science
How will you prepare potassium per magnate.
Saturday, February 9, 2013 at 8:12pm

12th grade physics ap question. A baseball with a mass of 120 g is hit 21.8 m into the air. The ball is caught by the third baseman 2.5 m above the ground. What potential energy did the ball develop at its highest point? How much potential energy did it still have when it was ...
Wednesday, October 24, 2012 at 7:38pm

A coffee dealer mixed 12 pounds of one grade coffee with 10 pounds of another grade of coffee to obtain a blend worth $54. He then made a second blend worth $61 by mixing 8 pounds of the first grade with 15 pounds of the second grade. Find the price per pound of each grade.
Sunday, October 21, 2012 at 12:23pm

12th science (mathbio) biology
Two plants biological information
Thursday, October 18, 2012 at 4:14am

Math (12th)
Tuesday, October 9, 2012 at 8:19pm

Math (12th)
Thursday, September 27, 2012 at 8:01pm

Math (12th)
Thursday, September 27, 2012 at 8:00pm

Math (12th)
7 and 12?
Thursday, September 27, 2012 at 7:23pm

Math (12th)
Thank you. I tried that and got 3 :)
Thursday, September 27, 2012 at 7:20pm

Math (12th)
The next one is + 2. What do you think the next two terms are?
Thursday, September 27, 2012 at 7:20pm

Math (12th)
Have you tried subtracting?
Thursday, September 27, 2012 at 7:18pm

Math (12th)
What are the next three terms of the geometric sequence 32, -16, 8, …?
Thursday, September 27, 2012 at 7:12pm

Math (12th)
What are the next three terms of the arithmetic sequence -18, -13, -8, -3,…?
Thursday, September 27, 2012 at 7:11pm

Math (12th)
What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...
Thursday, September 27, 2012 at 7:11pm

12th Grade world history
With regards to the mining and agriculture industry, in the nineteenth century, which of the following statements is false? A. Large companies tried to be paternalistic to keep workers from rebelling B. Specialization became more common C. Private investment grew D. Reliance ...
Saturday, August 25, 2012 at 1:42am

No, I'm in 11th going to 12th too. yeah most people use my posts for help haha
Tuesday, May 22, 2012 at 2:00pm

English, novel, ivanhoe
How is the late 12th century depicted by Sir Walter Scott, and do you find his interpretation realistic or purely fictitious? On what do you base your conclusions?
Sunday, May 13, 2012 at 9:50am

calculate the 16th term of an arithmatic progression he its fifth term is 6 and its 12th is 41.
Monday, April 9, 2012 at 1:46pm

Physics (12th Grade)
Internal energy may be expressed as U = ν•R•T/(γ-1), and U = ν• (i/2) •R•T, where ν is the amount of substance, i is the degrees of freedom (i1 =3, i2 =5), γ =Cp/Cv -adiabatic index. From p• V = ν•R•T, if V1...
Monday, April 9, 2012 at 10:25am

Physics(12th grade)
P V = n R T assume V constant P = (nR/V) T dP = (nR/V) dT dP/P = (nR/V) dT/P = dT/T but dP/P = .005 so .005 = 1/T T = 200
Monday, April 9, 2012 at 1:21am

Physics (12th Grade)
If it is heated at constant pressure, the volume must increase heat in = change in internal energy + work out dQ = dU + dW P V = n R T constant pressure P dV = n R dT = work out Change in internal energy = n Cv dT = n(5/2)R dT for diatomic gas total heat required = n R dT + (5...
Monday, April 9, 2012 at 1:12am

Physics (12th Grade)
isothermal bulk modulus of elasticity K(T) = P adiabatic bulk modulus of elasticity K(a) = γP, where P is the pressure, γ is ratio of specific heats – adiabatic exponent ( is the ratio of the heat capacity at constant pressure (C(p)/) to heat capacity at ...
Sunday, April 8, 2012 at 1:32pm

in an AP, if the 5th and 12th terms are 30 and 65 respectively. what is the sum of first 20terms
Thursday, March 1, 2012 at 11:43pm

in an AP, if the 5th and 12th terms are 30 and 65 respectively. what is the sum of first 20terms
Thursday, March 1, 2012 at 1:28pm

12th bio.
male ke sperm ka stracther
Tuesday, February 21, 2012 at 6:10pm

12th gustion papar 21 feb 2012
Monday, February 20, 2012 at 9:49pm

12th Physics
static = 0.37 kinetic = 0.32
Wednesday, February 15, 2012 at 11:33pm

The 3rd and 12th terms of an arithmetic progression are 12 and -24 respectively. What is the 50th term?
Monday, February 6, 2012 at 11:07am

This is the license that a teacher has to teach art in all grades through 12th.
Thursday, January 19, 2012 at 4:30pm

Hardwork I done already! :)
I know i'm a really good writer tho. When I fill out the college application in gr 12th I'm going to submit in my art and writing portfilio.
Friday, December 30, 2011 at 10:40pm

he 12th term in a geometric sequence is 49 and the 14th therm is 2401, find the 15th term
Sunday, December 18, 2011 at 2:26pm

Summer Session
Oh oook. It's just like John Hopkins like when students apply to John Hopkins University they say like they applied to the John Hopkins Talent Search but it's more different. This summer program is gor grade 11th or 12th graders. I'm taking it at my Junior year and...
Saturday, December 10, 2011 at 3:40pm

Measures of Central Tendency,variability, and postion 12th Grade math class. organize the data 78,67,95,85,84,86,82,75,85,94,91,57,78,7​7,88,90,91,86,84,82,75,58,73,75. Then do 4 columns of Grades,Deviations,Squares,and Z-Scores
Wednesday, November 30, 2011 at 12:21pm

paid before February 12th the social cost $2.00. If you paid at the door the social cost $5.00. Altogether, 110 students attended the social collecting a total of $454. How many students paid before February 12th and how many paid at the door?
Sunday, November 27, 2011 at 3:11pm

6,11,16,21,....Algebraic expression______ 12th term- 30th term- Plz help me plzzz
Tuesday, November 22, 2011 at 9:51pm

6,11,16,21,....Algebraic expression______ 12th term- 30th term-
Tuesday, November 22, 2011 at 8:53pm

Class 12th Application of Derivatives
Find a point on the parabola y = (x-4)^2, where the tangent is parallel to the chord joining (4,0) and (5,1). Solve this question using Lagrange's theorem. Answer is (9/2,1/4)
Wednesday, July 6, 2011 at 1:22pm

12th physics
for what angle of incidence the lateral shift produced by parallel sided glass plate is (i) zero (ii) maximum
Saturday, June 11, 2011 at 11:52am

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