Monday
December 22, 2014

Posts by Jack


Total # Posts: 1,366

Chemistry
g=.00461 ?
May 28, 2012

Chemistry
What mass of chromium II chlroide (CrCl2) is dissolved in 150.0mL of solution to prepare .250M solution? Please Help
May 28, 2012

Health
Writeacher, I need you help to rephrase and answer a question on the use of children in advertising. 1) I need to rephrase this: “ Advertisers want to reach into the hearts and minds of the people who are watching the ads. Today’s washing powders don’t just ...
May 24, 2012

Art
Writeacher,could you please check if all these sentences are possible? 1) I’m sure he didn’t rob the bank. He can't have robbed the bank He couldn't have robbed the bank . (is this possible?) 2) I’m certain he stole the ring He must have stolen a ring. ...
May 24, 2012

Art
Could you please check these sentences, Writeacher? Thank you. 1) A job seeker should make a short list of the job's requirements and should keep it in his mind during the interview. In this way he can bring in examples to demonstrate that he is the right person for the ...
May 24, 2012

Art
I left out these sentences. I hope you can have a look at them,too. Can you tell me if the modals are possible, Writeacher? 1) I’m sure he didn’t rob the bank. He can't have robbed the bank He couldn't have robbed the bank . (is this possible?) 2) I’m ...
May 23, 2012

Foreign languages
I urgenlty need you to check these sentences, please.Thank you. 1) A job seeker should make a short list of the job's requirements and should keep it in his mind during the interview. In this way he can bring in examples to demonstrate that he is the right person for the ...
May 23, 2012

Art
Could you please help me express the following evaluations? Thank you. 1) You wrote exactly what I included on the photocopy without varying (hardly/almost) anything. The only word you changed is not an English word. 2) You also failed to include information on the reading ...
May 23, 2012

Art
Can you please have a look at these sentences, please? 1) This information about the Augustan Age was not asked for in your test. You weren't supposed to introduce the Augustan Age. You should have focused on both Walpole's and Pitt's policy, the rise of a new ...
May 23, 2012

Foreign languages
Could you please check these sentences? Thank you,Writeacher. 1) In the first part if the novel she writes letters to her parents asking them for advice. However, she resists all her master's advances protecting virtue. 2) As a reward, he proposes marriage to her and she ...
May 23, 2012

math
ral sal tal val each have 1.85 in quarters and dimes.No two have the same number of coins together how many quarters do they have
May 16, 2012

Pre-calc
simplify cot(x+π)
May 15, 2012

Pre-calc
how many solutions are there to csc^2x=25 (0≤x<2π)
May 15, 2012

Pre-calc
Focus of the ellipse 9x^2+2y^2=36
May 15, 2012

Pre-calc
I am given the graph of y=f(x) and I am asked to sketch the graph of y=-2f(-x). How do I move and/or rotate the given graph?
May 15, 2012

history
please help me please.......
May 14, 2012

history
describe the difference between the poor and wealthy citizens of rome.
May 14, 2012

history
PLease help
May 14, 2012

history
describe the difference between the poor and wealthy citizens of Rome.
May 14, 2012

geometry
Two cones are similar. The larger cone, R, has a volume of 1331 cubic feet and the smaller cone, S, has a volume of 64 cubic feet. Find the scale factor of Cone R to Cone S.
May 10, 2012

Math
insert parentheses to make equation true. 5 / 3 + 3 x 5 = 4 1/6
May 9, 2012

Probability Math
Through a mix up on the production line, 5 defective light bulbs were shipped out with 32 good ones. If 4 are selected at random, what is the probability that at least 3 of them are defective?
May 2, 2012

Calculus
The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 360 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 9 dollar increase in rent. Similarly, one ...
April 26, 2012

Math
what is g(f(x))? and f(g(x))? if f(x)=(1)/(sqaure root3x) and g(x)=x^2-5 Thanks!
April 23, 2012

Chemistry
How much volume(mL)of 2.50 M NaOH(aq)must be added to 25.0 mL of water to produce a 1.50 M NaOH solution? Thanks!
April 23, 2012

math
meg has 20 pet stickers to go on a page 1/4of them are dog stickers 1/2of them are cat stickers the rest are rabbit stickers how many rabbit stickers does she have?
April 22, 2012

College Algebra
ln(8x+3)=ln11
April 20, 2012

science
An aluminum bar is 2m long at a temperature of 20 degrees C What will be the length of the bar at a temperature of 100 degrees C
April 19, 2012

physics
FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest___m smallest___m
April 16, 2012

math
3 sqrt-64x^3
April 15, 2012

American Government One Question Please Help!
LeXi<3 i know you
April 15, 2012

@elena
i noticed you helped a lot of people with their questions with physics ? can you hep me out please ? In putting, the force with which a golfer strikes a ball is planned so that the ball will stop within some small distance of the cup, say 2.00m long or short, in case the putt ...
April 15, 2012

h.s. physics
In putting, the force with which a golfer strikes a ball is planned so that the ball will stop within some small distance of the cup, say 2.00m long or short, in case the putt is missed. Accomplishing this from an uphill lie (that is, putting the ball downhill, ) is more ...
April 15, 2012

h.s physics
a baseball pitcher throws a baseball with a speed of 38m/s. estimate the average acceleration of the ball during the throwing motion,. in throwing the baseball, the pitcher accelerates the ball through a displacement of about 3.5 m from behind the body to hthe point where it ...
April 15, 2012

h.s. physics
a baseball pitcher throws a baseball with a speed of 38m/s. estimate the average acceleration of the ball during the throwing motion,. in throwing the baseball, the pitcher accelerates the ball through a displacement of about 3.5 m from behind the body to hthe point where it ...
April 15, 2012

English 7 Help! - please read
I think it just means she had a close relationship with the tree house. Like parents often have a soft spot or close relationship with their children. I don't know what story you're talking about, but basically I'm guessing the Tree house was like a get away spot ...
April 15, 2012

math
What is the square root of pi?
April 13, 2012

english
Hi I have to compare Mending Wall by Robert Frost to modern day time. I was thinking about comparing it to a song or movie, but I'm not sure of any. Do you have any ideas?
April 11, 2012

math plz help
how would you determine the number of diagonals in a regular 41-gon ?
April 8, 2012

Probability
Service time, T, at an auto center has a Weibull distribution with parameters θ=3.7 and β=1.35. What is the probability that at least 8 of the next 10 customers will have to wait more than 4.69 hours? What is the expected number of customers that will have to wait ...
April 8, 2012

Math
Hmmm well I certainly didn't want them to write a complex essay for me, just some a little help and some ideas. It's whatever though.
April 3, 2012

Math
I asked a question earlier: Identify and discuss 4 key actions taken by the U.S. Government between 1790 to 1820 that established long term policy in the U.S. Please help me answer this, thank you so much. and I got this response:Please note that we don't do students' ...
April 3, 2012

social
What were 3 groups that were in motion around the U.S. in the 19th century. Why did they change locations and how did this impact their lives?
April 3, 2012

government
B.
April 2, 2012

ACT
Any practice online for ACT, PSAE or sample questions.Please To much stress.
April 2, 2012

geometry
A sandpit in the shape of a rectangular prism has length 7 feet, width 5 feet, and height 1.75 feet. It is filled to the brim with sand. Joe puts this sand into a second sandpit having the same shape but a larger base. He needs 17.5 cubic feet of sand to fill the extra space ...
April 2, 2012

history (urgent)
Identify and discuss 4 key actions taken by the U.S. Government between 1790 to 1820 that established long term policy in the U.S. Please help me answer this, thank you so much.
April 2, 2012

math
what is the volume of a triangle prism with a base area of 24ft*2 and a height of 18ft
March 30, 2012

physics
A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the water to the top of ...
March 28, 2012

spanish
yo me
March 25, 2012

spanish
Yo ______ lavo ______ manos y ______ cara. ______ cepillo ______ dientes y ______ cepillo ______ pelo. Yo ______ pongo ______ ropa.
March 25, 2012

chemistry
draw amino acid.
March 24, 2012

History
Explain what does Robert.e.Lee says to his son in letter.
March 22, 2012

History
Explain what does Robert.e.Lee says to his son in letter.
March 22, 2012

statistics
Consider a random sample of 37 students, and consider the number who graduate in six years. . Find the probability that 20 students in the sample graduate in six years
March 20, 2012

physics
A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ? (b) repeat if the object is lowered insteadof lifted
March 19, 2012

critical thinking test AU
1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer: 4 CORRECT an average ...
March 12, 2012

math
Please help
March 5, 2012

math
1- writing to explain- why might you need to measure a perimeter with a measuring tape instead of a ruler? 2- how are a ruler, a yardstick, and a measuring tape the same? how are they different? i don't 1 answer and i try 2 answer please check is it right or not 2) a ruler...
March 5, 2012

math
2- A ruler a yardstick and a measuring tape are the same because they can measuring items. A rule a yardstick and measuring tape different because they can't measuring the same length. i don't know 1 answer please help me and i want to know number 2 is right or not
March 5, 2012

math
i don't this answer please help
March 5, 2012

math
please help
March 5, 2012

math
1-writing to explain- why might you need to measure a perimeter with a measuring tape instead of a ruler? 2-how are a ruler, a yardstick , and a measuring tape the same? how are they different?
March 5, 2012

3 grade english
thank you very much
March 5, 2012

math
my uncle said 85 meter come in answer
March 4, 2012

math
A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park my answer is 110 meters
March 4, 2012

Maths- Trigonometry
4. A,B and C are points on a horizontal plane. A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120 degrees. The bearing of B from A is 075 degrees. From A the angle of elevation of the top T of a vertical towel at C is 42 degrees. Find a. the ...
March 3, 2012

english
Ms. Sue help me last night and then i write again something then nobody help me
March 2, 2012

english
i just wanted to know how did you do # 9 because in the word their no SM word is only wr,kn,st,mb,and gn their no word like SM so please check again and i make (#9 GNASH) i just want to which i did it right or not rest of all correct yes or no
March 2, 2012

english
i don't #5
March 2, 2012

english
1-write wrote written 2-knight knob knit 3-listen wrestler whistle 4-thump comp plumber 5-gnaw 6-wreath 7-doorknob 8-plumber 9-knash 10-thimble 11-whistle 12-starled 13-crumb 14-wrinkle 15-knock
March 2, 2012

english
consonant patterns wr,kn,st,mb,gn directions read each word and idenify the consonant pattern with the silent letter. on the lines,write two more words that have the same silent consonant pattern. underline the consonant pattern in each word you write. 1- write _______ ...
March 2, 2012

math
a rectangle has a length of 5 yards and a width of 3 yards. what is its perimeter? explain your answer.
March 2, 2012

history
could you please give me any information about houses in hot dry countries
March 1, 2012

Math
What is the function rule for 0,31 1,27 2,23 3,19
February 27, 2012

math
I have no idea
February 26, 2012

physics
If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.7 ?
February 25, 2012

maths
10 pencils in each packet 46 pencils how many packets are needed
February 25, 2012

ASHFORD
Identify two distinct fallacies you see committed in the media.
February 23, 2012

Algebra 2
2^(3x+1)=2^)2/x) I don't know what to do here to get both of the xs
February 18, 2012

chem
Balance the equation and answer in terms of moles. Chlorine gas can be produced commercially by passing an electric current through a con-centrated solution of sodium chloride (brine). The unbalanced equation is NaCl(aq) + H2O(`) ! NaOH(aq) + Cl2(g) + H2(g) . If the brine ...
February 15, 2012

Math
Addition But When it's [ (x)^2 ] ^1/2 you can put a negative value under the square in this case besides that you change the powers ex : (-8)^2/3 that means [ (-8)^2 ] ^1/3 and you can write it as [ (-8)^1/3 ] ^2 * for (^1/3) you can put a negative value the answer in both...
February 15, 2012

Math
+ h^20 Explanation : [(x)^a]^b = (x)^(a)(b) = (x)^ab But Be Careful when it's like [ (x)^(1/2) ] ^2 where (^1/2) is the square root and you can't put a negative value under a square root
February 15, 2012

Calculus
any constant 1 , 0 , 2 , pi , square root its derivative = 0 so dy/dx x^2+y^2= sqrt(5) 2 x x' + 2 y y' = 0 [x' = 1] 2x + 2yy'=0 ] /2 x + yy' = 0 y' = - x/y
February 15, 2012

Calculus
1) you find y' (dy/dx) (f'(x)) 2) replace each x by a which equal to one f(x) = (x+1)^1/2 f'(x) = 1/2 (x+1)^-1/2 (1) f'(x) = 1 / 2(x+1) f'(0) = 1/ 2(0+1) = 1/2 = 0.5
February 14, 2012

algebra
i think you mean x^2 - 7x - 8 = (x-8)(x+1)
February 12, 2012

Calculus (Antiderivatives)
((x-2)(x+2) / (x-2) ] / (x-2) int x+2 = 1/2 x^2 + 2x + c
February 10, 2012

Calculus
f'(x) = 6x - 5 / 2 sqrt(3x^2-5x+7) f'(2) = 12 - 5 / 2 sqrt ( 12-10+7) = 7 / 2 sqrt (9) = 7/ 2*3 = 7/6 = 1.16666
February 10, 2012

math
The plane is at least 500 miles closer to chicago than to denver
February 10, 2012

Mathematics
It's still really confusing. >o< My type of problems: **8x(squared)/35y(squared)/x(squared)+4x+3/x(squared)-1 **4a(squared)/ab/a(squared)-5a+6/a(squared)-2a **1+1/a / 1-1/a
February 9, 2012

Mathematics
Can someone explain to me how to solve complex fractions as if I didn't know anything about Algebra? I really need the help, thanks. :) It's not like this is the question of my homework, I just don't understand how to solve complex fractions from the start . . .
February 9, 2012

Calculus
Find dy/dx for f(x)= (1+x)^(1/x)
February 8, 2012

Calculus
Find dy/dx for (e^xy)+ x^2 +y^2=10
February 8, 2012

Calculus
Find the inflection points of f(x)=(x^2-6x-5)e^x
February 8, 2012

Calculus
Integrate from e^2 to e of tthis funtion: 1/(x)ln(x) dx
February 8, 2012

Calculus
Find integral of (x^3-6x-20)/(x+5) dx
February 8, 2012

Calculus
Find the relative extrema of f(x)= x/ln(x)
February 8, 2012

Calculus
The rate at which iPads are sold is R(t)=1000000x2.8^t where the units of R(t) are millions/year and represents time in years such that the year 2010 (Jan 1 2010 through Dec 31 2010) corresponds to t=0. How many iPads will be sold in the three year period Jan 1, 2012 through ...
February 8, 2012

math
it takes a skier 30 seconds to ski down the 1st mountain to the second mountain that is 40 feet above ground. it takes the skier 6 seconds per foot to slide down. how many feet above ground is the 1st mountain?
February 5, 2012

statistics
.096
February 4, 2012

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