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October 24, 2014

Posts by David


Total # Posts: 1,685

math115
divide 30/49 divide 16/21= 45/56 a triangle has a base 15ft and an altitude of 8ft find the area =60ft^2
October 20, 2009

Physics
You are correct. I had the EXACT same Physics problem and got them correct.
October 17, 2009

Math
find mean, median and is mean or median more useful representation 25,29,30,30,30,31,33,34,40,41,46,63 mean 36 median 32 more useful 32
October 17, 2009

Math
find median 4,5,6,8,11,17 answer 7 find mean and median 68,69,71,75,76,76,81,82,86,88,93,94,95,95,96 answer mean is 83 median is 82 ?
October 17, 2009

Math
evaluate |-24|-|-22| answer -2? -|-618|answer -618 3-|7-9|answer 5? ?
October 17, 2009

Math
determine max and min value 3,- 36/7,-1,-2/3,5/4,-5,26/9 answer max3 min-5 ? put in asending order -2/9,-1/9,3/7,5/9,1/8
October 17, 2009

Math
add -4/5+{-3/4} simple form 1 1/5
October 16, 2009

math
Two circles of radius 4 are tangent to the graph y^2=4x at the point (1,2). Find the equations of the two circles.
October 14, 2009

math
Find (f + g)x, (f-g)x, (fg)x, and (f/g)x and their domains. f(x)=¡î(9-x©÷),g(x)=¡î(x©÷-4)
October 12, 2009

math
Find (f + g)x, (f-g)x, (fg)x, and (f/g)x and their domains. f(x) = ¡î(9-x©÷), g(x) = ¡î(x©÷-4)
October 11, 2009

Math
How much space (in ft³ ) will be taken up by the 458 balloons.
October 11, 2009

Math
Height: The volume of a cone is 100 in³. Find a function that models the height h of the cone in terms of its radius r.
October 9, 2009

Math
Minimizing Sum: Find two positive numbers whose sum is 100 and the sum of whose squares is a minimum.
October 9, 2009

Math
Maximizing Area: Among all rectangles that have a perimeter of 20 ft, find the dimensions of the one with the largest area.
October 9, 2009

math
Height: The volume of a cone is 100 in^3. Find a function that models the height h of the cone in terms of its radius r.
October 9, 2009

math
A woman 5 ft tall is standing near a street lamp that is 12 ft tall. Find a function that models the length L of her shadow in terms of her distance d from the base of the lamp.
October 9, 2009

geometry
Find a function that models the area A of a circle in terms of its circumference C.
October 8, 2009

math
A young man spent 1/4 of his allowance on a movie. He spent 11/18 of the remainder on after-school snacks. Then from the money remaining, he spent $3.00 on a magazine, which left him 1/24 of his original allowance to put into savings. how much of his allowance did he save?
October 7, 2009

math
If you place one full container of flour on one pan of a balance scale and similar container 3/4 full and a 1/3-pound weight on the other pan, the pans balance. How much does the full container of flour weight?
October 7, 2009

math
An airline passenger feel asleep halfway to her destination. When she awoke, the distance remaining was half the distance traveled while she slept. How much of the entire trip was she asleep?
October 7, 2009

math
60 guest were present at dinner. Is this correct?
October 7, 2009

math
how many guests were present at a dinner if every two guest shared a bowl of rice, every three guests shared a bowl of broth, every four guests shared a bowl of fow, and 65 bowls were used together.
October 7, 2009

5th grade
I am a 3-digit number.My first digit is a square number.My last digit is 3* my second digit,which is my half my first digit.What am I.
October 6, 2009

physics
Calculate the terminal speed of a wooden sphere(density 0.830g/m^3) falling throught air if its radius is 8.00cm and its drag coefficient is 0.500? From what height would a freely falling object reach this speed in the absence of air resistance?
October 1, 2009

accounting 201
I am sorry I am tired and meant to write professional fees.
September 30, 2009

accounting 201
Oops I said I could not figure out capital, it was processional fees that I meant to list. Capital is clearly 30,000.
September 30, 2009

accounting 201
I am having trouble figuring out my accounts payable and capital. Any help on going about and solving this would be greatly appreciated. I have listed the data below... Travis Fortney, an architect, opened an office on April 1, 2010. During the month, he completed the ...
September 30, 2009

Science
A 6.0 volt battery is hooked up to a light bulb, whose resistance is 3.1 ohms. How many electrons would leave the battery per second? (Hint: 1 electron = 1.6E-19 C)
September 28, 2009

physics
After falling from rest at a height of 29.2 m, a 0.488 kg ball rebounds upward, reaching a height of 20.3 m. If the contact between ball and ground lasted 1.68 ms, what average force was exerted on the ball? I'm so confused on where to start. tyvm
September 22, 2009

5th grade
4+9,6+7,8+5
September 21, 2009

SOCIAL STUDIES
HOW DID THE ICE AGES INFLUENCE HUMAN MIGRATION
September 17, 2009

Elasticity (Physics)
A tunnel of length L=150m, height H=7.2m, and width w=5.8m (with a flat roof) is to be constructed at a distance d=60m beneath the ground. The tunnel roof is be entirely supported by square steel columns, each with a cross sectional area of 960 cm^2. The mass of 1.0 cm^3 of ...
September 9, 2009

physics
vcfcffgygyy
September 2, 2009

Chemistry
if pressure on a 2.50 ml gas sample were doubled from 0.500atm to 1.00 atm what would be gas volume at the new pressure?
September 2, 2009

Statistics
A study has shown that the thickness of sheet steel follows an approximately uniform distribution from 20 to 50mm. What is the probability that a sheet of steel chosen at random will be between 20 and 30mm?
August 30, 2009

Math
Thanks so much I understand now
August 28, 2009

Economics
Suppose that the governmental authorities wished to decrease use of a pesticide that is leaching into groundwater supplies in a watershed by 60% from current use levels. Discuss the advantages and/or disadvantages of distributing marketable pesticide permits to each farm ...
July 24, 2009

8th grade
i need help 4 a test on everything inequalities
July 19, 2009

math
Why is math so hard?
July 15, 2009

math
let the width be x and the length be y we know xy = 6 and x^2 + y^2 = (2ã5)^2 = 20 Perimeter = 2(x+y) from algebra we know (x+y)^2 = x^ + 2xy + y^2 but we know the values on the right side, so (x+y)^2 = 20 +12=32 then x+y = ã32 and the perimeter is 2...
July 15, 2009

English
This question is based on the book "The Curious Incident of the Dog in the Night-time" by Mark Haddon. What do you think makes a hero? How does Christoper fit your idea of a hero? He has been described by some readers as "a new kind of hero" or "an ...
July 8, 2009

Finance
. Mr. Kane recently borrowed $15,000 from his Aunt Jemima, and he has promised to pay his aunt $5,000 per year at 15%. How long will it take Mr. Kane to pay off the entire loan from his aunt? 2. You just borrowed $1,000 from Mr. Loan Shark. Mr. Shark requires you to pay $150 ...
July 6, 2009

Finance
1. Mr. Kane recently borrowed $15,000 from his Aunt Jemima, and he has promised to pay his aunt $5,000 per year at 15%. How long will it take Mr. Kane to pay off the entire loan from his aunt? 2. You just borrowed $1,000 from Mr. Loan Shark. Mr. Shark requires you to pay $150 ...
July 3, 2009

CHEMISTRY
a. ) The bond length is the internuclear distance. b. ) The covalent bond is a region of high electron charge density between two atoms. c. ) Hybrid orbitals are combinations of atomic orbitals. d. ) There are the same number of hybrid orbitals produced as the number of atomic...
July 3, 2009

CHEMISTRY
Which statement about structure and bonding is INCORRECT? a. ) The bond length is the internuclear distance. b. ) The covalent bond is a region of high electron charge density between two atoms. c. ) Hybrid orbitals are combination of atomic orbitals. d. ) There are the same ...
July 3, 2009

Chemistry
First, start with a balanced equation. Then, use stoichiometry to determine the limiting reactant and then how much product (AgCl) is produced. Use this (theoretical yield) and the actual yield (33.6g) to determine the percent yield.
June 23, 2009

Chemistry
For mole composition, you would convert each to moles and then determine the percent of each to the total.
June 23, 2009

Finance
Given the following information: profit margin = 10%; sales = $100; retention ratio = 40%; assets = $200; equity multiplier = 2.0. If the firm maintains a constant debt-equity ratio and no new equity is used, what is the maximum growth rate? (Assume a constant profit margin.)
June 17, 2009

Finance
Moore Money Inc. has a profit margin of 11% and a retention ratio of 70%. Last year, the firm had sales of $500 and total assets of $1,000. What is the internal growth rate?
June 17, 2009

International Business
1. Construct a quantitative example to illustrate the principle of comparative advantage. 2.What are dynamic effects of free trade and why might they be important?
June 2, 2009

International Business
What are the current challenges facing the World Trade Organization (WTO)?
June 2, 2009

math
I would say that the rate is 12.5%. btw, this task is just nonsense
May 31, 2009

math
divide 36x^8-24x^6+20x^3/-4x^3
April 30, 2009

Physics
An ice skater, has a rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. She then changes her rotational inertia to 2 kg m2. What is her final angular velocity? a. 4 rad/s b. 2 rad/s c. 2.8 rad/s d. 8 rad/s The answer must be A then right.
April 30, 2009

Physics
An ice skater, hasa rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. Her rotational inertia then undergoes a change to 2 kg m2. Which of the following is true? a. Her angular momentum remains the same b. Her angular velocity increases c. Her kinetic energy increases ...
April 30, 2009

Physics
so its A then right
April 30, 2009

Physics
An ice skater, has a rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. She then changes her rotational inertia to 2 kg m2. What is her final angular velocity? a. 4 rad/s b. 2 rad/s c. 2.8 rad/s d. 8 rad/s I say B, am i right?
April 30, 2009

Physics
There is a net net torque that is applied to a rigid object. What happens? a. the angular momentum of the object will change b. the kinetic energy of the object will change c. the object will experience an angular acceleration d. the rotational inertia of the object will ...
April 28, 2009

Physics
The Angular momentum of an object that spins is determined by a. the rotational speed b. the mass of the object c. the choice of the axis of rotation d. all of the above I say d based on the fact that momentum =r*p where p is mv and r takes into account the axis
April 28, 2009

Physics
A diver jumps off a dving board and does a twisting manuever. In the midst of his jump in the air, the diver cannot change his a. Rotational Energy b. Rotational Speed c. Rotational Inertia d. Angular momentum I say d just want to make sure
April 28, 2009

Physics
A wheel spins on a horizontal axis, with an angular spped of 140rad/s and with its angular velocity pointing east. Determine the magnitude of the angular velocity after an angular acceleration of 35 rad/s^2, pointing 68 degress west of north, with a time of 4.6 seconds. I ...
April 23, 2009

Physics
A wheel spins on a horizontal axis, with an angular spped of 140rad/s and with its angular velocity pointing east. Determine the magnitude of the angular velocity after an angular acceleration of 35 rad/s^2, pointing 68 degress west of north, with a time of 4.6 seconds. I ...
April 23, 2009

Chemistry
IN my experiment, I was doing a qualitative analysis of Group I and II anions using a flowchart. IN the chart I added 5 drops of 0.1M AgNO3 and several drops of 3M HNO3 to 5 drops of solution and found that a precipitate was formed. Thus it was classified as a Group I anion. ...
April 12, 2009

Chemistry
The experiment that I did in lab consisted of performing a qualitative analysis of group 1 and 2 cations and anions. The first thing that I did was to add 5 drops of 3M HCl, centrifuge it, and to observe whether a precipitate would form. It did and in the flowchart it ...
April 12, 2009

chemistry
What would be the advantages and disadvantages of using tribasic sodium phosphate (aka trisodium phosphate) to soften water by removing calcium ions?
April 12, 2009

Chemistry
What is going on in the hexane layer at the end of the Group I anion experiment? (when color of hexane layer is yellow you have Br- and when it is brown or purple you have I-.) please explain
April 12, 2009

math
63% of 105$
April 2, 2009

Pre Cal.--Check my work?
Solve the system of equations: x - y - z = 2; x + 2y - 2z = 3; 3x - 2y - 4z = 5? well, you have: 1- x-y-z=2 2- x+2y-2z=3 3- 3x-2y-4z=5 multiply both sides of the equation 1 by 2: x-y-z=2 ===> 2x-2y-2z=4 add this by equation 2: 2x-2y-2z=4 x+2y-2z=3 ==> 3x - 4z = 7 (*) now...
March 30, 2009

Accounting
Give an example of the following tranactions •Increase an asset and increase a liability. •Increase one asset and decrease another asset. •Decrease an asset and decrease owner's equity. •Decrease an asset and decrease a liability. •Increase an ...
March 27, 2009

Adv. Math.
Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots
March 26, 2009

English
hey, I am trying to write an essay for my university english class but I cannot find any good literary criticism databases. I went to mla international bibliography but couldn't find anything. I am trying to write an essay on the Fall of american dream for Of mice and men ...
March 19, 2009

MATH
Find the periodic withdrawals for the annuity of $400,000 at 4%, paid out monthly for 16 years. (Assume end-of-period withdrawal and compounding at the same intervals as withdrawal. Round your answer to the nearest cent.)
March 11, 2009

MATH
Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
March 11, 2009

MATH
Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
March 11, 2009

MATH
Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
March 11, 2009

math
Convert all the fractions so that they all have the same denominator (the number below the line). That way, you can tell how big they are relative to one another just by looking at the numerator (the number above the line). (#1.) 2/5, 1/10, and 3/20 can all be converted so ...
March 11, 2009

Math
Two old watches were found. Both watches were set for the current time. Forty-five minutes later one old watch was 1 minute ahead and the other old watch was 2 minutes behind. The next morning one watch read 7am and the other read 6am. At what time were the two old watches set?
March 11, 2009

Math
1) Figure out number of grams of silver 3 kilograms X 1000 g/kilogram= 3 X 10^3 grams 2) Figure out number of atoms in 3X10^3 grams of silver 3 X 10^3 grams X 5.58 X 10^21 atoms/gram = 16.74 X 10^24 atoms or 1.674 X 10^25 atoms
March 10, 2009

Anatomy
How do we perform complex actions that apparently require no thinking?
March 10, 2009

math
I think i misunderstood the question.. is it just 1080 - 896
March 10, 2009

math
Suppose that a college admissions office needs to compare scores of students who take the Scholastic Aptitude test(SAT) wit those who take the american college test (ACT). Suppose that among the college's applicants who take the SAT, scores have a mean of 896, and a ...
March 10, 2009

MATHEMATICS
Find the amount accumulated in the sinking fund if $1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)
March 9, 2009

math
Find the periodic payments necessary to accumulate $20,000 in a sinking fund paying 4% per year, with monthly payments for 5 years. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
March 9, 2009

math
When I was considering what to do with my $10,000 Lottery winnings, my broker suggested I invest half of it in gold, the value of which was growing by 10% per year, and the other half in CDs, which were yielding 3% per year, compounded every 6 months. Assuming that these rates...
March 9, 2009

MATH
do u tutor me for my nys test
March 9, 2009

Mathematics
Oh, these are the variable inputs. d=deposit each time period i=rate per time period n=number of time periods
March 8, 2009

Mathematics
My teacher gave us this equation, and I can't remember how to use it. It's for Simple and Compound Interest. Future Value=d[((1+i)^n-1)/i] d=deposit each time period i=rate per time period n=number of time periods
March 8, 2009

texas state
draw a supply curve for an ice parlor switching production from ice cream to yogurt.
March 5, 2009

ALGEBRA 1
the equation that passes through the given point and is parellel to the point (2,-3);2x+y=5
March 4, 2009

english
who are the two main characters in the story
March 3, 2009

Probability/Statistics
Two independent events, A and B, satisfy Pr(A) = 0.6 and Pr(B) = 0.3. In the case of Pr(A or B), why isn't the answer 0.3? We are looking at the probability of A or B. I choose B. Thank you!
February 24, 2009

Math
antiderivative of (x-2)/(x-1)
February 23, 2009

Marcoeconomics
And is the bond price=face value?
February 17, 2009

Marcoeconomics
if Bond price= the discounted value of all the future income it will generate then does it mean that the buyer of the bond earn nothing? Because he in fact need to pay the discounted value of the future income(interest) which is said to be earned by him when buying the bond. ...
February 17, 2009

Marcoeconomics
My logical deduction is: asset demand for money + transaction demand for money= money demand=supply of bond(as bond issuers create supply of bonds)
February 15, 2009

Marcoeconomics
According to the formula, Bond price= y/r so bond price has a inverse relationship with interest rate.i.e. interest rate increases, bond price decreases. But why does it contradict with this demand-supply anysis: r(interest rate increases)--> returns from buying bonds ...
February 15, 2009

Reiny! Reiny! Reiny! Answer Check and HW Help!
3) Answer (12, 28) 4) Answer (4, 22)
February 12, 2009

Engineering
Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of steel ...
February 12, 2009

Engineering
5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of ...
February 12, 2009

Engineering
Thanks bob mind helping me with one more? The questions all ready posted, same subject.
February 12, 2009

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