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August 27, 2014

Posts by carol


Total # Posts: 605

Stats
Can you tell me what ∑xy means? Like is in the sum of all x times y or what?
July 10, 2011

Economics
2. Lucy quits a $50,000 job to open her waffle business. She makes $225,000 in revenue from her first year of waffle sales. She pulls $50,000 out of an account that returns 3% interest per year and invests the entire amount in her business. She also borrows $50,000 at 10% ...
July 9, 2011

Economics
The lost interest from the savings she used to start her business. -- is this an implicit or explicit cost? Is this a fixed or variable cost?
July 9, 2011

chemistry
a 30.0 ml solution of potassium nitrate was diluted to 125 ml and 25 ml of this solution were then diluted to 150 ml. the concentration of the final solution is 0.00307 M. Calculate the concentration of the original solution.
July 7, 2011

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
July 6, 2011

geometry
determine the length of the sides and the measures of the angels for the congruent quadrilaterals ABCD and A'B'C'D' there are 2 diagrams but don't know how to show it to you
June 28, 2011

Physics
1. A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a second ball that is at rest and has a mass of 0.1kg. After the collision, the velocity of 0.1kg ball is 0.26m/s. What is the new velocity of the first ball. Please indicate which equation you use, what ...
June 26, 2011

SCI/275 (Risk Assessment)
I don't know this math, but the instruction of the assignment says that we are to make a "projection chart" based on the information of record. How do I multiply/divide, etc., in order to find the "future" numbers?
June 19, 2011

SCI/275 (Risk Assessment)
There is a direction in this assignment where the projection of WNV in Genericville is 50 cases. It also mentions that in 2006, there were 4,269 cases, of WNV including 177 fatalities. It follows with the proposal that the Malathion would reduce the mosquito population by 90% ...
June 19, 2011

Financial Accounting
, how much manufacturing overhead was allocated to production? Archangel Manufacturing has just finished the year 2012. They created a predetermined manufacturing overhead allocation rate at the beginning of the year based on a percentage of direct labor costs. Below are ...
June 15, 2011

Math
In a geometric series, t1=12 and S3=372. What is the greatest possible value for t5? Justify your answer.
May 30, 2011

whole number
When stacking bags of dog food, the heaviest items should be placed at the bottom. Starting at the bottom, in what order should bags of dog food weighing 25 pounds, 20 pounds, 30 pounds, and 28 pounds be stacked?
May 30, 2011

computer science
in visual logic You will need to design an application that it will prompt a user for their hourly pay rate, their hours worked, and whether they are single, married, divorced, or widowed. It will then calculate their gross and net pay. If they work more than 40 hours, ...
May 22, 2011

computer science
it has to be in visual logic.. can u help me just with the input??
May 22, 2011

computer science
Your goal is to solve the following programming lab activity. Write a program that prompts & accepts a number between 1 and 12. After getting the input, display the number with the appropriate month. (example: This is the 1st month…January, This is the 2nd month…...
May 22, 2011

childhood education
what does reseach show about the child;s relationship with the primary parental figure when the child has additional attachments to other people
May 13, 2011

College Stats
Is .09 less than .05?
May 8, 2011

Alg. 2
determine if equation represent ellipse or hyperbolas. Example 4x^2 = 5y^2 + 6
May 6, 2011

math
In solving the equation (x + 4)(x – 7) = -18, Eric stated that the solution would be x + 4 = -18 => x = -22 or (x – 7) = -18 => x = -11 However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please ...
May 4, 2011

math
Solve using the substitution method. Sh 3x + 24y = 24, 27x – 15y = -15 .
May 4, 2011

math
h(t) = -9.8t^2-10t + 250
May 4, 2011

math
Express in terms of i.-(-496)
May 4, 2011

math
(4a^3 - 7a^2) - (8a^3 + 1a^2) Subtract = 4a^3 - 7a^2-8a^3 - 1a^3 = 4a^3 - 8a^3 - 7a^2 - 1a^2 = (4-8)a^3 - (-7 - 1)a^2 = -4a^3 - 8a^2 Is this correct?
May 4, 2011

math
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest ...
May 3, 2011

math
Subtract. (4a3 – 7a2) – (8a3 + 1a2)
May 3, 2011

math
Solve by factoring: 9t2 + 3t= 0 p2 + p + 4 = 0
May 3, 2011

math
Navigation. The current in a typical Mississippi River shipping route flows at a rate of 4 mph. In order for a barge to travel 24 mi upriver and then return in a total of 5 hr, approximately how fast must the barge be able to travel in still water?Solve by factoring: 9t2 + 3t= 0
May 3, 2011

math
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.2x + 2y = 202x – 2y = 4
May 2, 2011

math
Use polynomial long division to divide -4x3 + 24x2 – 24x + 4 by x2 – 5x + 1
May 2, 2011

math
Multiply 3x + 3 by -4x2 + 4x – 2 (Points : 20)
May 2, 2011

math
Joe has a collection of nickels and dimes that is worth $8.55. If the number of dimes was tripled and the number of nickels was decreased by 2, the value of the coins would be $23.45. How many nickels and dimes does he have?
May 2, 2011

math
Given the quadratic function f(x) = x2 – 18x + 81, find a value of x such that f(x) = 16.
May 2, 2011

math
Use polynomial long division to divide -4x^3 + 24x^2 – 24x + 4 by x^2 – 5x + 1
May 2, 2011

math
use the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this 3x + 24y = 24s,27x – 15y = -15 .
May 2, 2011

math
. Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions. 8x2 + 2x + 4 = 0 Two different irrational ...
May 2, 2011

math
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.8x2 + 2x + 4 = 0
May 2, 2011

math
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest ...
May 2, 2011

math
10a^2 + 25a - 15 factor out the GCF.
May 1, 2011

math
Completely factor the expression 36x3 – 96x2y + 64xy2
May 1, 2011

math
Completely factor the expression 20x2 – 45y2
May 1, 2011

algebra
A 10-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 2 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and vertical distances spanned...
May 1, 2011

math
Completely factor the following expression: 16y2 – 25z2
May 1, 2011

education
Thank you Ms.Sue!
April 28, 2011

education
can someone please give an example question that can be used to interview a librarian about the issues/trends in children's literature.
April 28, 2011

math
81x^2 - 126xy + 49y^2 factoc into a product of bionomials
April 28, 2011

algebra
The area of a rectangular athletic field is represented by the expression 9y^2 - 25z^2 square meters. Write an algebraic expression to represent one possible set of dimensions (in the sense “length times width”) of the athletic field. Include correct units with your ...
April 28, 2011

Math
Naomi studied each of the letters below with a flat mirror. abcdefghijklmnopqrstuvwxyz she then constructed this chart characteristic 1 charac 2 char 1&2 bcdehiox hiox what letters go in the second column
April 26, 2011

Trigonometry
If sin A=3/5 and cosB = 24/25 and angle A and angle B are both in quandrant 1. What is sthe exact value of cos (A-B)?
April 25, 2011

calculus
verify the following identity cos(x+y) + cos(x-y)=2cosxcosy
April 22, 2011

english- macbeth
hey.. did you take a test in act 2 .... if yes .. could you plz give me the questions if you can.
March 29, 2011

english- macbeth
thanks alot, that really helped :)
March 29, 2011

english- macbeth
well i have a couple of questions about the tragedy of macbeth that i have no clue how to answer so if you could lend me some help i'll appriciate it. it's act 2: Q1) Though Macbeth encounters no actual opposition until long after Duncan is murdered, Shakespeare must ...
March 29, 2011

history
How and why did the American economy soar from 1950 to 1970?
February 21, 2011

history
How did the Vietnam War, and the domestic opposition to it, come to dominate American politics in the 1960s?
February 21, 2011

history
is it the island of sicily
February 17, 2011

history
the island that became Rome northwestern frontier?
February 17, 2011

English
I need a consonance for the poem miniver cheevy by E. A. Robinson.
February 16, 2011

physics-ASAP
a crate on a frictionaless plank inclined at angle theta with respect to the horizontal. Which of the follwing relationships is true? (assume that the x-axis is parallel to the surface of the incline) a)Fy = Fg b)Fx=0 c)Fy=Fx d)none of the above *my answer would be c but i ...
February 13, 2011

chemistry
Suppose that a compound Z had a partition coefficient of 8 in ether-water. If 10g of z was dissolved in 100mL of water, and if the water solution was extracted with two 100 mL portions of ether, answer the following questions a) what is the total amount of z contained in 200mL...
February 13, 2011

grammar
extravagantly & high very & solitary
February 10, 2011

grammar
extravagantly & high very & solitary
February 10, 2011

grammar
underline the adverb and circle the word or phrase it tells more about. These furs brought extravagantly high prices. Theirs was a very solitary existence.
February 10, 2011

algebra
8% of(n+2)equals 12. What is n?
January 26, 2011

science
A _____ of heat is a place from which the heat comes.
January 25, 2011

biology
I am posting this question in Biology instead of Algebra even though it is a question from my Algebra class. Thanks. A male bee has only one parent(a mother) and a female bee has two parents (a mother and a father).Assuming all ancestors are distinct, how many great, great, ...
January 23, 2011

algebra
Find an integer M such that M x 2 to the third power x 3 to the 7th power = 6 to the 7th power.
January 23, 2011

math===pls. help==
For numbers less than 40, list each pair of numbers that has a greatest common factor (GCF) of 12.
January 21, 2011

English
Hey... Can you please give me some questions on William Shakespeare sonnet 29, 30, and 116. I tried to look for MCQ to practice some more, but i didn't find so please if you can help me i'll appriciate it thanks
January 20, 2011

health care studies
micro perspective vs marco perspective which has the greatest influencce on a person health?
January 17, 2011

5th math
n - 2/3 = 3/4 find the LCD, which is 12 n - 8/12 = 9/12 n = 9/12 + 8/12 n = ? find ? and reduce if possible
January 7, 2011

trig-reply to Reiny
sorry for the late thank you!! I lost the post and couldn't find it. doubt you will see this, and I didn't want to clog up the page with a new post. you're the greatest!!
January 3, 2011

trig-reply to Reiny
Continued, also this isn't an official assignment. I'm teaching myself calculus. I just love math. I took cal 30 thirty ago but don't remember much. I use Wolframe Alpha to check my answers. here's the web paste without the beg. address part, you'll have to...
January 3, 2011

trig-reply to Reiny
It's actually the end of an integration problem from a college calc text I have from 1971. The problem involved Weierstrass Substitution. The part I posted was after converting from the u-substition to an answer in terms of x. The orig prob. is integrate (cos x )/(3 cos^2 ...
January 3, 2011

trig-reply to Reiny
I'm new to this. I didn't know you could reply to the original post? (testing with this reply), otherwise I would not have kept re-posting as a 'new' question. I just noticed some replies as I was reading other questions. again, my apologies. I feel like I ...
January 3, 2011

trig-reply to Reiny
RE: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) Thanks for your help, sorry I posted 3 times, I thought you didn't understand what I needed. I really do appreciate your time spent. just for your FYI, if you are ...
January 3, 2011

trig
Third time is the charm? I'll try again. Could someone show me how, (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) TIA Carol This doesn't require the solving of any equations. For example, ( same concept for what I ...
January 3, 2011

trig
I asked below but I guess it was not understood what I was asking. I'll try again. Could someone show me how, (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) TIA Carol I know the half-angle formulas are used but I cannot...
January 3, 2011

Trig
Could someone please show me how 1 / ( 4 tan (x/2) + 2 ) is converted to: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) TIA Carol
January 3, 2011

Calculus
Can someone give a detailed solution to this integration problem? ∫ dx /(3(1 - x^2 ) - (5 + 4x)√(1 - x^2)) this symbol √ is square root The answer is ( I need the steps and/or u-substitution used to arrive at this answer...
December 30, 2010

teacher aide work experience
I need help with this
December 19, 2010

5th grade math
Tamara says that 15/3=5.Is she correct?Explain how you know?
December 14, 2010

math
Simplify sin^2x+cos^2x+sec^2x -tan^2x+csc^2x-cot^2x
December 6, 2010

algebra
how do you figure this equation step by step 4x-3y=11 2x+3y=13
December 4, 2010

PreCal
Funny how you go on every other post and accuse them of cheating, but yet here you are requiring the answer to one of your math problems!! Ha ha!! Too Funny!!!
November 22, 2010

org chm
how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?
November 17, 2010

physics
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 127 m. How fast is she going when she reaches the bottom?
November 16, 2010

math
fran made a rectangle with 36 square tiles.the sum of the length and width is 15.what are the length and width of her rectangle?
November 4, 2010

Physics
A building superintendent twirls a set of keys in a circle at the end of a cord. If the keys have a centripetal acceleration of 115 m/s2 and the cord has a length of 0.36 m, what is the tangential speed of the keys?
October 29, 2010

math
I'm in 5th grade pls. help. Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X'...
October 25, 2010

math
pls. help
October 24, 2010

math
I'm in 5th grade pls. help. Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X's...
October 24, 2010

Math
thats the question...draw a picture or diagram to explain the square number.
October 24, 2010

Math
this pattern represents the square numbers 1,4,9,16,25,36 diagram to explain square numbers. pls. help
October 24, 2010

4th grade
what is correct order smallest to largest 0.6,0.06,0.43,0.9
October 21, 2010

math
K/1=-45 K=?
October 12, 2010

math
-28/1=A A=?
October 12, 2010

math
solving problems and crimes..can you solve the following cases? 1) what letter belongs to in the empty box? O T T F F S S E 2) write a sentence to describe this pattern.. 3,8,13,18,23,28,30,31,32 please help i don't understand.
October 12, 2010

Algebra
s1 = 18 + .4m, s2=11.2 + .54m when is one spring 10 cm longer than the other one? (s = cm long)
September 27, 2010

physics
A car is driven 165 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
September 26, 2010

math problem
You are going to drive 480 miles today at an average speed of 60 miles per hour. Thus you are going to drive for a total of 8 hours. The diameter of the wheels on your car (including tires) is 25 inches. Thus each wheel is going to turn a total of ___ times today. I have tried...
September 23, 2010

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