# Posts by andrew

Total # Posts: 1,165

**pre algabra**

write 20h/24h in its simplest form

*September 13, 2011*

**Physics**

A raindrop of mass 57.40 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 17.50 m/s, which is reached high above ground. What would be in N the weight of the rain ...

*September 8, 2011*

**Math**

A landscaper is designing a garden with hedges through which a straight path will lead from the exterior of the garden to the interior. If the polar coordinates of the endpoints of the path are (20, 90°) and (10, 150°), where r is measured in feet, what is the equation...

*September 6, 2011*

**Math**

An auditorium has 1600 seats. At a ticket price of $6, the owners can sell 1200 tickets. For each 25 cent increase in price the tickets sold reduces by 25. What price should the owners set to maximize the income?

*August 30, 2011*

**Math**

How do you write the expression for...the sum of the quotient of p and 14, and the quotient of a q and 3

*August 22, 2011*

**American Democracy**

What is Devolution

*August 17, 2011*

**college writing**

I like baseball, I can learn about the sport and it is also fun.

*August 12, 2011*

**Engineering Dyanamics**

post an answer.

*August 1, 2011*

**Science**

If it takes 35s for the tughboat to increse its speed uniformly to 25 km/h, starting from rest. The barge has a mass of 75Mg. The propeller provides the propulsion force F which gives the tughboat foward motion, where as the barge moves freely. Determine the force of the rope ...

*August 1, 2011*

**math**

What is the projected population over a period of 340 years in a region which begins with three couples?

*July 18, 2011*

**Calculus**

i got V= 4x^3-72x^2+288x V=12x^2-144x+288=0 Then I foiled that and my answers were x=6 and x=12. Clearly I have no idea what I'm doing, I have a test in my class on wednesday and I need to be able to make sense of this in my homework due tomorrow

*July 18, 2011*

**Calculus**

Would that make the dimensions x=6 and 12? or did I do that wrong?

*July 18, 2011*

**Calculus**

an open box is made by cutting out squares from the corners of a rectangular piece of cardboard and then turning up the sides. If the piece of cardboard is 12 cm by 24 cm, what are the dimensions of the box that has the largest volume made in this way?

*July 18, 2011*

**Algebra 1**

Can someone help me do this problem? (The square root of x squared minus 11) + 1 = x.

*July 8, 2011*

**Chemistry**

Little confusing!! I need help PLZ!!! Two half cells in a galvanic cell consist of one iron (Fe(s)) electrode in a solution of iron (II) sulphate (FeSO4(aq)) and a silver (Ag(s)) electrode in a silver nitrate solution. a. Assume the cell is operating as a galvanic cell, state ...

*June 17, 2011*

**physics**

a 20 pound inch per hundred psi motor operates with a torque load of 500 pound inches. what is the operating pressure?

*June 17, 2011*

**Probability**

1 a) What is the probability of you drawing three face cards from a well shuffled deck if you keep each card you draw? Since there are 12/52 face cards would it be first 12/52, then 11/51 then 10/50? I am confused about this b) What is the probability of you drawing three face...

*June 5, 2011*

**Probability**

How many different three-digit numbers can be formed using the digits 1,3,5,7 and 9 if the digits may be repeated?

*June 5, 2011*

**Spelling**

homesick

*May 26, 2011*

**Advances Functions And Modeling**

Find the sum of the first 40 terms of the arithmetic sequence: 13, 19, 25, 31, ...

*May 24, 2011*

**math**

if you need 10 quarts of juice and have 2 gallons,do you have enough juice?

*May 23, 2011*

**math**

What is more? 3 quarts of juice or 10 cups of juice?

*May 23, 2011*

**Economics**

if the government lowers taxes the republican party will be very excited and it will be as if the republicans are the leaders and democrats are not having a change to make their own decisions.republicans always have wanted to not have to pay taxes.

*May 23, 2011*

**science**

What do kids do on Make a Difference DAY?IS IT A POPULAR HOLIDAY?

*May 19, 2011*

**math**

excuse me you just answered someone's question who posted after me shouldn't you try to answer mine? Also, I still need help on this question.

*May 17, 2011*

**math**

someone please help me!!! and fully explain!!! =0

*May 17, 2011*

**math**

a dollar bill has an area of 15.86 square inches. If a dollar bill is 2.6 inches long, how wide is it? Also, please explain how you got the answer because i am very confused.

*May 17, 2011*

**business**

explain the stages in the retail life cycle and the different strategies that a manager can employ inorder to maximise returns

*May 6, 2011*

**Math**

21 3/5

*May 4, 2011*

**Math**

A boat moves 7 kilometers upstream in the same amount of time it moves 17 kilometers downstream. If the rate of the current is 9 kilometers per hour, find the rate of the boat in still water.

*May 4, 2011*

**social studies**

Why do people need government?

*May 2, 2011*

**Science**

Where can I find AP Environmental Science old AP exams? I need to study.

*April 29, 2011*

**chemistry**

210 210 Pb --> Bi + ? 82 83 60 0 Co --> ? + e 27 -1 I need an explanation on how to find the missing product.

*April 6, 2011*

**calculus**

@Damon : Appreciate it sir. u are a life saver. i was on track and needed a kick . thanks alot.

*April 2, 2011*

**calculus**

1. Consider a projectile, say a frictionless teddy bear, which is thrown at an angle of theta with an initial velocity of v0. a) For a fi xed angle, and the maximum height of the teddy bear. b) Calculate the distance that the teddy bear travels before ...

*April 2, 2011*

**calculus**

6. A parabaloid with height h and radius r has volume 1/2 pieR^2H. Consider a parabaloid-shaped water tank with height of 7m and radius of 4m. If V is the volme of water in the tank and h is the depth of water, find the relationship between dV/dt and dhdt. How is the ...

*April 2, 2011*

**math/physics**

@ reiny if dx/dt = 0 then y should also be zero

*April 1, 2011*

**math/physics**

if dx/dt = 0 then y should also be zero

*April 1, 2011*

**math/physics**

5. Consider a particle moving counter-clockwise around the ellipse x^9/9 +y^2/4 = 1. Find a relationship between dy/dt and dx/dt What are the rates of change of y and x at the times when the other variable isn't . changing at all?

*April 1, 2011*

**munir**

its bit of maths and physics. ms .sue. use of function

*April 1, 2011*

**biology**

A man with normal color vision marries a woman who is colorblind. What percentage of their sons would be colorblind, what percentage of their daughters would be colorblind, what percentage of their daughters would be carriers of the colorblind gene?

*March 31, 2011*

**physics**

I'm trying to find the pressure exerted by an object that has a force of 180 newtons on an area of 10 square centimeters

*March 31, 2011*

**US History**

Question 1 (Multiple Choice Worth 1 points) Around the turn of the century, African Americans moving to cities in the North experienced substantially less racism than did African Americans in the South. more opportunities to become skilled workers than they had two decades ...

*March 23, 2011*

**programming 2**

Write a program that inputs a word representing a binary number (0s and 1s). First, your program should verify that it is indeed a binary number, that is, the number contains only 0s and 1s. if that is not the case, your program should print a message that the number is not a ...

*March 22, 2011*

**calculus**

Complete the identity. sec(x)sin(x)/tan(x) - 1 = 0

*March 20, 2011*

**Math**

What is the formula for the area of a triangle and trapezoid?

*March 17, 2011*

**math**

What are the first and third quartiles of the box and whisker plot above? 0 15 110 225

*March 13, 2011*

**Statistics**

What type of data must you collect to conduct a t-test, why?

*March 11, 2011*

**Statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...

*March 11, 2011*

**English 2**

Republicans favor business. Teenagers are seeking their own identities. Top students work hard. But I don't like where I can go with any of them, and I can't think of anything more!

*March 11, 2011*

**English 2**

Need help with this-- "In this exercise you'll write an essay supporting a generalization you've stated about some topic." Any ideas for generalizations?

*March 11, 2011*

**english**

All I see is that you need a comma after "your agent."

*February 24, 2011*

**Math**

Thanks

*February 24, 2011*

**social studies**

Mercenary

*February 24, 2011*

**calculus**

80000

*February 24, 2011*

**Algebra**

The $75 cost for a party was to be shared equally by all of those attending. Since five more people attended than was expected, the price per person dropped by 50 cents. How many people attended the party?

*February 21, 2011*

**pre-algebra**

the length of a rectangle is 10 inches more than its width. what are the dimensions of the rectangle if its perimeter is 80 inches?

*February 11, 2011*

**Chemistry 125**

What is the maximum mass of water that can be released by heating a 6.895 g sample of nickel(II) sulfate heptahydrate?

*February 10, 2011*

**Physics**

1) Charges of +4uC and -6uC are placed at two corners of an equilateral triangle with sides of 0.10m. At the third corner, what is the electric field magnitude created by these two charges? A]4.5 x 10e6 N/C B]3.1 x 10e6 N/C C]1.6 x 10e6 D]4.8 x 10e6 2)A +2.0 nC pont ahrge ...

*February 3, 2011*

**math**

All 26 letters of the alphabet are written on cards and shuffled. If one card is pulled out randomly, find the probability. (note Y is not considered a vowel for these problems) P(A or Z) =

*February 2, 2011*

**algebra II**

factor completely: 8h^3-125

*January 29, 2011*

**AP Chem**

For the system CO(g) + H2O(g)<-->CO2(g) + H2(g) Kp is 1.6 at 900 K. If 0.400 atm CO(g) and 0.400 atm H2O(g) are combined in a sealed flask, what is the equilibrium partial pressure of CO2(g)?

*January 23, 2011*

**Physics**

1. Could a horizontal axis of rotation be used satisfactorily in an experiment uniform circular motion? Explain

*January 16, 2011*

**Physics**

508.4 N [2(2.0m)/6.2m]x788.0N

*January 16, 2011*

**Chemistry**

Chemical equation of: 1.Digesting of food 2.Fermentation of Wine 3.Burning of fuel

*January 13, 2011*

**Algebra**

This question is unsolvable.

*January 12, 2011*

**Math need help now!!!!!**

We perform the experiment "deal a five card poker hand". What is the probability that you are dealt a hand that contains the Ace, Two, Three, and Four of Diamonds? Question 22 answers 4 / 2,598,960 48 / 2,598,960 1 / 2,598,960 1 / 52

*January 12, 2011*

**Chemistry**

How to find the marked volume in graduated cylinder?

*January 9, 2011*

**Chemistry**

when the beaker has rated capacity of 10 ml, does it mean that it has to be filled to the brim?

*January 9, 2011*

**Math**

If you toss a pair of dice 1,000 times, how many times would you expect to get a sum of 12 as the result? 1.)about 12 times 2.)about 27 times 3.)about 36 times 4.)about 100 times The lesson doesn't show me how to work this. Whats the formula?

*January 7, 2011*

**American Government**

Which of the following is NOT a key role of the President? to decide if laws are unconstitutional perform many ceremonial duties command all military offices during both peace time and during war responsible for executing the nation's laws I Think it's 3 or 4 not sure ...

*January 5, 2011*

**American Government**

Thanks!

*January 5, 2011*

**American Government**

Committees made up of members from both the House of Representatives and the Senate are called Question 18 answers 1.)standing committees. 2.)select committees. 3.)subcommittees. 4.)joint committees. I think it's either 2 or 4 not sure please help!

*January 5, 2011*

**Math 157**

no the girls can be arranged 9 different ways and the boys can be arranged 49 different ways

*January 5, 2011*

**Math**

2x - y = 4 6x - 3y = 7 (a) y = 2x - 4 (b)No solution (c)x = 2, y = -4 (d)x = 2, y = 5/3

*January 3, 2011*

**Math**

Solve each of these systems using the substitution method. Make sure to check your answers ! 2x + 3y = -4 x - 2y = 5 Question 1 answers x = 1, y = -2 x = -1, y = 2 x = 1, y = 2 x = -2, y = -1

*January 3, 2011*

**science**

what are 3 examples of selective breeding in plants

*December 21, 2010*

**Math**

m+8+2+n

*December 20, 2010*

**Math**

Simplify each expression. You may use the properties to help. When you type your answer, do not space between numbers and symbols. (4a)(5b)(6c)?

*December 16, 2010*

**3rd grade math II**

HOW CAN EXPLAIN WHY 975-492 = 583 IS REASONABLE ?

*December 14, 2010*

**Physics**

a person fires a rifle at a arget. the bullet leaces the rifle at 460 m/s and the person hears the bullet strike the target 2.00 seconds after firing it. the air temperature is 25.o celcius. what is the distance to the target?

*December 12, 2010*

**Physics**

a person fires a rifle at a arget. the bullet leaces the rifle at 460 m/s and the person hears the bullet strike the target 2.00 seconds after firing it. the air temperature is 25.o celcius. what is the distance to the target?

*December 12, 2010*

**physics**

what equation would you use if you wanted to find the net x-direction force on the box example: here is the problem... A box of mass 24.0 kg is subject to an applied force of 245 N with a depression angle of 31.2°, and it accelerates to the right. The horizontal surface ...

*December 5, 2010*

**Pjysics Help!!!**

An organ pipe is open at one end and has a length of 3 m. What is its fundamental frequency if the speed of sound is 336 m/s?

*December 1, 2010*

**Math**

Use the Gauss-Jordan method to solve the equation: 3x-5y-2z=-9 -4x+3y+z=11 8x-5y+4z=6

*November 24, 2010*

**Science**

sugar is a covalent compound

*November 16, 2010*

**math**

would the long side be 36 in?

*November 16, 2010*

**math**

Herman is making a small triangular table. If two of the sides will measure about 25 inches each, how many inches should the longest side (c) measure? Use the appropriate formula and round your answer to the nearest tenth. I don't know how to do this cuz it doesn't ...

*November 16, 2010*

**Economics**

Hi guys, I'm having a lot of trouble with this question. Maybe I should have paid attention more, too late now though. If anyone could help or point me out in the right direction, I'd really appreciate it! Thank you. Here is what the paper says "Your assignment is...

*November 15, 2010*

**AP Chemistry**

What is the equation for the standard enthalpy of formation for magnesium nitrate?

*November 14, 2010*

**Physics**

The answer is wrong. What did u get?

*November 13, 2010*

**Physics**

A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. (a) Find the work done by the pulling ...

*November 13, 2010*

**chemistry**

which of the following would form acidic,basic or neutral solutions:nh4f,nh4cn,nh4ch3coo,nh4cl,ba(ch3coo)2,nacn,caso4,cr(no3)3,fecl3,na2co3

*November 11, 2010*

**Physics**

2. A person exerts a perpendicular force of 75 N on a door. Calculate the torque on the door hinges if the force is applied a distance of 30 cm, 50 cm, and 75 cm from the hinge.

*November 4, 2010*

**American Government**

Haha never thought of it that way! Thanks!

*November 4, 2010*

**American Government**

Is this statement true: The Secretary of Defense could never become President.

*November 4, 2010*

**Integrated math**

A meteorologist tracked the increase and decrease of rain totals in inches from the previous year. This is the data for the following 4 months: January -1.34, February +2.68, March + 1.79, April -0.87. Estimate the change from the previous year by adding the totals rounded to...

*November 3, 2010*

**CHEM. help please**

2 H2O (l) → 2 H2 (g) + O2 (g) 1. Without doing any calculations, which side will enthalpy favor in this reaction? Entropy? 2. What volume of water in gallons would need to be split to store the same amount of energy as found in 10.0 gallons of gasoline? (Gasoline ...

*November 2, 2010*

**chem**

In a vehicle, H2 could be used in a fuel cell to generate energy. Hydrogen is not an energy source, but a means of transporting energy because the extraction of H2 from the logical source, H2O, takes as much energy as is returned when the gas is used. 2 H2O (l) → 2 H2 (g...

*November 2, 2010*