Monday
February 8, 2016

# Posts by janet

Total # Posts: 397

Chemistry
What is Mass % of an aqueous NaOH solution in which molality of NaOH is 16.7m? Density of the solution is 1.4339g/ml
January 13, 2013

Chemistry
Solutions are made that contain 0.1 moles of each of the following compounds below in 100g of H20. Choose the compound whose solution will have the lowest freezing point? NaBr CO2 KClO3 MgCl2 MgSO4
January 13, 2013

Chemistry
Which of the following solutions would have the highest osmotic pressure? 0.15 M KCl 0.2 M C6H12O6 0.2 M C12H22O11 0.2 M CH3COOH 0.15 M CaCl2
January 13, 2013

Intergrated Algerbra
A caterpillar and snail are 300 ft apart. They meet face to face in 5 hours. What were their speeds?
November 29, 2012

Physics
a net force of 3.50 N acts on a 2.75 kg object. what is the acceleration of the object?
November 29, 2012

science
How many grams of citric acid is needed to titrate 20ml NaOH 0.05M their mole ratio is 1:3 respectively
November 28, 2012

algebra
Completely factor the following expressions. 1. 256z^2-4-192z^2+3 2. 2a^2c^3-14bc^3+32c^3d^2 3. 35g^2+6g-9 4. 3j^3-51j^2+210j
November 28, 2012

algebra
Completely factor the following expression.1.) 5c^2-24cd-5d^2
November 28, 2012

algebra
Completely factor the following expression.1.) 5c^2-24cd-5d^2
November 28, 2012

algebra
Completely factor the following expression. 1.4x^2-8x-12+6x
November 28, 2012

Chemistry
What is the general trend in the acidity of Period 3 oxides moving across the Periodic table from left to right? (Be sure to refer to the term acidity.)
November 27, 2012

math
2x squared plus 6 x plus 3 is equal to 0.....
November 26, 2012

Medical coding
What icd-9 procedure code is used for a hemilaminectomy medial facetectomy and foraminotomy?
November 18, 2012

Algebra 1
Christopher orders a 3 topping pizza for \$15.25 and a 5 topping pizza for \$17.75. Write and solve a system of linear equations to find the price of a plain pizza( no toppings) and the cost of each topping.
November 14, 2012

Algerbra 1
You have a coupon for \$50 off your camera purchase of \$100 or more at Zeke's Camera World. Write a function relating a camera's purchase price, y, to the retail price, x. Give the domain of this function.
November 14, 2012

alegbra 1
Solve the following systems of linear equations using algebraic method. 1)3y=11-2x 3x=y-11 2)8x-6y=14 12x-9y=18
October 31, 2012

alegbra 1
Solve the following system of linear equation using any algebraic method. 2x+5y=3 X-3y=7
October 31, 2012

alegbra 1
Solve the following system of linear equation using any algebraic method. 2x+5y=3 X-3y=7
October 31, 2012

alegbra 1
Solve the following system of linear equation using any algebraic method. 2x+5y=3 X-3y=7
October 31, 2012

alegbra 1
Solve the following systems of linear equations using any algebraic method.If possible,check your solution. 1)2x+5y=3 X-3y=7 2) 3y=11-2x 3x=y-11 3)8x-6y=14 12x-9y=18
October 30, 2012

Math
Some chickens, cows, and sheep are in a field. Their number of legs is 12 more than twice their number of heads. How many 4 legged animals are in the field?
October 25, 2012

algebra 1
Natalie performs a chemistry experiment where she records the tenperture of an ongoing reaction.The solution is 93.5 C after 3 minutes;90 C after 5 minutes,84.8 C after 9 minutes; 70.2 C after 18 minute; 54.4 C after 30 minutes;42.5 C after 37 minutes; and 24.9 C after 48 ...
October 24, 2012

algebra 1
1. Solve the linear system using substitution. 4x-y=5 4x+4y=-4
October 23, 2012

AP US History
well ms.sue the fact that she can't answer the question doesn't mean she doesn't have the potential to be in an AP class.
September 26, 2012

Math
Shoe me the steps to solvethe problem 12 divided by 1/4 to the second power
September 17, 2012

chemistry
what is the formula to determine the mass of propane that must be combusted in order to produce 188.23kJ of energy?
August 11, 2012

math
Try drawing a venn diagram and placing the numbers you have inside the circles for individual subjets.Then see how the numbers compare to the total number of students.
August 11, 2012

english
The answer is D because a slant rhyme is a "rhyme in which either the vowels or the consonants of stressed syllables are identical". Firm and Room have the final 'M' sound in common.
August 11, 2012

science
the experiment could be repeated with the same mice
August 6, 2012

hEALTH
B. If you write down what you consume and look at the package (or go online for resteurant food or fruits and vegetables) to see how many calories it has then you can keep a detailed record. The reason C doesn't work is that every one's body, metabolism,diet, and ...
August 1, 2012

math
What is the surface area of a rectangular prism measuring 3 1/2 ft.by 2 3/8 ft. by 8 feet ?
July 20, 2012

math
Thank you so much!
July 20, 2012

math
What is the surface area of a rectangular prism measuring 3 1/2 ft.by 2 3/8 ft. by 8 feet ?
July 20, 2012

math
Find the volume in cubic feet of the right rectangular prism measuring 3 1/2 by 8 feet by 2 3/8 feet
July 20, 2012

algebra 1
Label each statement true or false if false correct the underlined portion.If -4<-2t+6<10,then this is the underlined 2>t+6>-5. If this is underlined |y+8|+2=6,then this not underlined y+8=_+4. Translate and solve. the absolute value of three times a number,n,is ...
July 13, 2012

stat
Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)
July 7, 2012

prealgbra
brandon needs \$480 to buy a tv and stereo system for his room.He received \$60 in cash for birthday presents. he plans to save \$30 per week from his parttime job.to find how many weeks w it take to have \$480, solve 60+30w=480
June 28, 2012

algebra
Christine went shopping and brought each of her eight nephews a gift , either a video costing 14.95 or a cd costing 16.88. she spent 133.41 on the gifts. How many videos and how many cds
June 4, 2012

Chemistry
Does ph differ with changes in concentration?
April 20, 2012

Chemistry
What is the pH of a 0.0353M solution of NH4F and a 0.0000666M solution of NH4F?
April 20, 2012

Math Probability dice roll
two fair dice are rolled, find the A)odds of getting a 9 B) the odds against getting a 12
April 16, 2012

trig
171km
March 11, 2012

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
March 11, 2012

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
March 11, 2012

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
March 11, 2012

language arts
that is actually true, but why is it so popular? could it be because of the brand name, or advertisement?
February 27, 2012

language arts
i'm doing a project on choosing some "status symbols" popular in society today. one status symbol i did was the restaurant called cheesecake factory, how do i explain how it is popular/important today?
February 27, 2012

comparing group means
what appropriate null and alternative hypothesis would i use in this problem a teacher gives students a holding review session. did attending the session make a differnts in the final points in the class,give example of the appropriate statisical procedure
February 18, 2012

math
One number is 25% of another. The larger number is 12 more than the smaller. What are the numbers?
February 16, 2012

Algebra
The Hansons are considering two possible vacation destinations. A trip out west will cost \$1075 in total airfare plus an average of %450 per day in expenses. A trip south will cost \$1500 in total airefare plus an average of \$365 per day in expenses. How many days should they ...
February 15, 2012

English Home Language
Can You Please Give Me Points as To How to add persuasive points to my speech " Women Should Rule The Way" I Already said they more Patient and better communcaters
February 10, 2012

A class consist of half as many boys as girls, if there are 14 boys how many girls are there
November 17, 2011

chemistry
the number of grams of KCI per 100g of water that would produce a saturated soluion at 50 degrees C is?
November 15, 2011

Geometry
need to find x x+153=130+2x+23
September 29, 2011

geometry
suppose m is b/t L and N. LM=4x+8, MN=9x-4, LN=82. what is x?
September 25, 2011

history
what was The Significance of Noah Webster thinking and writing
August 31, 2011

math
what is the least possible number you can weite with a 1 in the thousands place?
August 25, 2011

Chemistry
When oxygen expands from the liquid to gaseous state how much more volume does it occupy?
July 30, 2011

think build live success
I am currently enrolled in uma and Im trying to figure out my instructor because there is lack of commmunication on her part
July 24, 2011

College Math
Given the following sets select the statement that is NOT true. A=(l,a,t,e,r) B= (l,a,t,e) C=(t,a,l,e) D=(e,a,t)E=(t,e,a) E=D E=B D=A C=A D=B
July 15, 2011

statistics
Make up 20 hypothetical scores. Determine their mean, median, mode, and standard deviation.
June 24, 2011

maths
Please can you help me with this question? Choose the option which is a false statement: A arctan(tan2/3pi))=-1/3pi B arccos(cos(3/4pi))=3/4pi C sin(arcsin(-1/2pi))=-1/2pi D arcsin(1/2squareroot3)=1/3pi E arcsin(sin(3/4pi))=1/4pi F arccos (1/2squareroot2)=1/4pi
May 26, 2011

science
if a plane drops a bomb, does the bomb fall straight down, or behind or forward?
May 18, 2011

chemistry
A 14.0g of N2 occupies what volume atSTP
May 16, 2011

Calculus
THe demand funtion is modeled by D(q) = 56e^-0.000012q, where q is quantity and D(q) is price. What price will yield the maximum revenue? Prove this is a maximum using as qppropriate derivative test.
May 11, 2011

Calculus
Evaluate integral, don't use calculator. I'll use the S as the sign for integral S 4 sin (theta)d(theta) from pi/2 to pi I know the answer is 4 because I enter it in on my calculator, but don't know the steps to get to the answer. Please help.
May 9, 2011

Calculus
Yeah. Thanks for showing me the steps
May 9, 2011

Calculus
The area bounded between the line y=x+4 and the quadratic function y=(x^2)-2x. Hint: Draw the region and find the intersection of the two graphs. Add and subtract areas until the appropriate area is found. I found the intersection points as (-1,3) and (4,8). I'm not sure ...
May 9, 2011

Calculus
Thanks.
May 9, 2011

Calculus
Find the limit. lim x-->1 (x^3)-1/((5x^2)+2x-7) Please show steps.
May 9, 2011

calculus
Quadratic function written in standard form where a, b, and c are constants such that a is not zero. f(x)= ax^2+bx+c Using calculus find the vertex of the parabola formed by this quadratic function. Determine under what conditions this vertex is a maximum or minumum (using ...
May 8, 2011

math
Suppose a state lottery prize of \$2 million is to be paid in 20 payments of \$100,000 each at the end of each of the next 20 years. If money is worth 9%, compounded annually, what is the present value of the prize?
May 1, 2011

Algebra
Use the five steps for problem solving to answer the following question. Show all work. Andrew is having an irrigation system installed in his yard. Company A charges \$1250 plus \$15 per sprinkler head. Company B charges \$1200 plus \$17 per sprinkler head. How many sprinkler ...
April 28, 2011

Carry on with the problem.. To find maximum profit, not revenue, would I take the derivative of the profit function, which I have as Profit=125*(12L+29L^2-1.1^3)-7000L. If I take the derivative of this(which I'm not sure I did right) my L=16.78 or .79. If I plug it back ...
April 21, 2011

1. So this is the answer I got 12L+29L^2-1.1L^3=0 L(12+29L-1.1L^2)=0 L=0, 26.77, -0.41 The minimum number of laborers would be 0. The maximum number of laborers would be 26.77. THe range would then be (0,26.77) because when I substitute a number >26.77 into the above ...
April 21, 2011

I really need help, this is my second post. Information to solve problems Q=12L+29L^2-1.1L^3 Q= # of cars produced/year L=# of laborers used per year for production Each car sells for \$125. \$7000 per laborer per year is cost for labor and other consumable materials. Questions...
April 21, 2011

Calculus
Information to solve problems Q=12L+29L^2-1.1L^3 Q= # of cars produced/year L=# of laborers used per year for production Each car sells for \$125. \$7000 per laborer per year is cost for labor and other consumable materials. I attempted some parts of these questions and some ...
April 21, 2011

Calculus
Find any absolute max/min and local max/min for the function f(x)=x^3-4x+5 on the interval [0,5). Made sure to prove that these points are max/min values. This is what I did so far. f'(x)=3x^2-4=0 3x^2=4 x= 2/sqrt3 The -2/sqrt3 is outside of interval so can't use. x=2/...
April 18, 2011

Calculus
The position in meters of a particle is given by f(t)= 14t-3t^2, where t is measured in seconds. a) Evaluate f'(2) and interpret the results. This is how I solved this. f'(t)=14-6t= 2(7-3t) f'(2)=2(7-3(2))= 2 This means the velocity of the particle is 2 m/s when t=...
April 18, 2011

accounting
(TCO 8) Partial balance sheets for ABC Company and additional information are provided below. ABC Company, Partial Balance Sheets, As of December 31 2009 2008 Equipment \$100,000 \$75,000 Accumulated depreciation (25,000) (20,000) Common stock, \$5 par 180,000 100,000 Paid in ...
April 18, 2011

Calculus
Bosnian, Thanks for your help. I just want to make sure I understand. The local min and max are the same f(2/sqrt3) = 1.92 Are there any absolute maximum or minimum? Thanks again.
April 17, 2011

Calculus
Find any absolute maximum and minimum and local maximum and minimum for the function f(x)=x^3-4x+5 on the interval [0,5). Make sure to prove that these points are max/min values. THis is what I did. f'(x)=3x^2-4=0 x= +/- 2/sqrt3 -2/sqrt3 is outside of interval so just use ...
April 17, 2011

Calculus
Use Newton's Method to approximate the root of the function f(x)=e^x-5x when the intial point chosene is x1=1.5. Do two iterations. This is what I did, but not working. f'(x)=e^x-5 x2=1.5 - (e^1.5-(5(1.5))/e^1.5 -(5)) =1.5-(4.4817-7.5/4.4817-5)=1.5-5.8234= -4.3234 x3=-...
April 17, 2011

Calculus
let f(x)=x^3(e^-x) Answer using calculus, use graphing calculator only to check work. a) Find the local and global extrema of f. b) Find the intervals where f is increasing/decreasing. c) Find the inflection points of f. d) Find the intervals where f is concave up/down. e) ...
April 17, 2011

calculus
The length of a rectangle is decreasing at the rate of 2 cm/sec, while the width w is increasing at the rate of 3 cm/sec. At what rate are the lengths of the diagonals changing at the instant that l=15 cm and w= 8 cm? Are the diagonals increasing or decreasing in length at ...
April 16, 2011

math
i am a relflex angle. all the digits in my angle measure are even. all of my digits are different. all three of my digits are factors of 8. my tens digit is greater than my one digit. what is my measure?
April 4, 2011

chemistry
24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O (l) + O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?
March 23, 2011

chem
24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O(l)+ O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?
March 23, 2011

Calculus
Sorry I don't understand how to get the second derivative, I gsolved the first derivative already
March 20, 2011

Calculus
I need help with finding first and second derivative--simplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?
March 20, 2011

calculus
Did I do this problem right? Find the first and second derative-simplify your answer. y=xtanx y'= (x)(sec^2 x)+(tanx)(1) y'= xsec^2 x + tanx y"= (x)(2secx)(secxtanx)+sec^2 x + sec^2 x y"=2xsec^2 x tanx + 2 sec^2 x
March 18, 2011

calculus
I plug in the numbers into the formula that I used, but I don't get the same answer. Here's what I did, maybe you can tell me what I did wrong. (likely a dumb algebra mistake) f"(x) = lim-->0 f'(x+h)-f'(x)/h =(1/4(x+h)+1)^2 - (1/4x+1)^2/h =(1/16x^2+32xh...
March 16, 2011

calculus
To solve the first step I used the equation f'(x)=lim h-->0 f(x+h)-f(x)/h Can I use this same formula to solve for the second derivative?
March 16, 2011

calculus
Find the first and second derivative - simplify your answer. y=x/4x+1 I solved the first derivative and got 1/(4x+1)^2 Not sure if I did the first derivative right and not sure how to do the second derivative.
March 16, 2011

Maths
A television set is on sale for \$780 cash, or 25% deposit and \$85 per month for 8 months. How much can be saved by paying cash? How much is charged in interest? Calculate the annual rate of simple interest charged? Working out please:)
March 16, 2011

calculus
I solved this problem, can someone check it to make sure I did it right. There are two parts to this intrepation and estimate of the value. Let C(t) be the total value of the US currency (coins and banknotes) in circulation at time, t. The table gives values of this function ...
March 16, 2011

english
Hi I need help and I appreciated it. am kind of confused and dont what to write. I have to do journal where I see, read, explore, observe about Intersecionality. How can I start writing about this? Thanks
March 14, 2011

Physics
Steel is very stiff, and the Young's modulus for steel is unusually large, 2.0×1011 N/m2. A cube of steel 25 cm on a side supports a load of 85 kg that has the same horizontal cross section as the steel cube. What is the magnitude of the "normal" force that...
February 25, 2011

History
how did the rest of the US feel about war with mexico?
February 18, 2011

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