Wednesday

September 28, 2016
Total # Posts: 262

**math**

a 3ft tall boy casts a 4ft shawdow at the same time a tree casts a 72 foot shawdow using the pythagorean therem find the distance from the top of the tree to the tip of the shawdow

*December 19, 2011*

**alegebra**

if i bought 4 pairs of shoes for $325.50 and later bought another pair of shoes for $35, what was the mean cost of all the pairs of shoes?? thanks!(:

*December 15, 2011*

**alegebra**

if a rectangular pen for dogs has an area of 480 square meters, and the length of the pen is 2.4 meters, what is the width of the pen??

*December 15, 2011*

**geometry**

in quadrilateral ABCD AC is a diagonol, m<ACD=2x+4 and m<ACB=5x-11 what proves ABCD a rhombus

*November 30, 2011*

**Psychology Please Help!**

A!

*November 26, 2011*

**chemistry**

for the list of chemicals below, write complete, balanced equations for all possible reactions that would lead to an insoluable salt. KCl, BaCl2, AgNO3, Pb(NO3)2, K2SO4, HNO3

*October 28, 2011*

**chemistry**

1. How many grams of P4 will react with 35.0 grams of H2O according to the balanced equation P4+5O2+6H2O=4H3PO4? 2. If you have 50 grams of P4, 40 grams of H2O, and an unlimited supply of O2, which reactant (according to the above balanced equation) is the limiting reactant? ...

*October 16, 2011*

**chemistry**

Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?

*October 16, 2011*

**Organzie **

Sorry about the name my sister wrote that. She ask me to ask you for the ideas.

*October 1, 2011*

**Organzie **

How do you organzie binders? Also I'm making a homework binder. I need some ideas. Please Thank You !!! :)

*October 1, 2011*

**Calculus. Please help!**

Would I then plug in x and y into the original equation to find the minimum value? When I do that I get approximately 19.472, but my webwork homework says that is incorrect.

*August 10, 2011*

**Calculus. Please help!**

Find the minimum value of the function f(x,y= 25x^2+3y^2+20xy+10x+4y+10 subject to the constraint 5x^2+4xy=1. I solved fx=50x+20y+10 fy=6y+20x+4 gx=10x+4y gy=4x Then what?

*August 10, 2011*

**Calculus**

Solve the separable differential equation: dy/dt=4y^6 and find the particular solution satisfying the initial condition y(0)=-3 y(t)=?

*July 29, 2011*

**Calculus**

A cost function is given by: A'(x)= 2x^2/x^2-211/x^2. For what values is A(x) increasing and decreasing? Any help would be appreciated

*July 19, 2011*

**Calculus**

A manufacturer can produce digital recorders at a cost of 60 dollars each. It is estimated that if the recorders are sold for P dollars a piece, consumers will buy q= 150-p recorders each month. What is the average rate of profit obtained as the level of production increases ...

*July 18, 2011*

**Calculus**

Find the derivative of: y= 5^x + 15/x^6 I'm assuming I need to take the natural log of each side, but I get stuck after that part.

*July 18, 2011*

**Another Calculus**

Sorry I have been trying to figure this out all day. Find the largest and smallest values of the given function over the prescribed closed, bounded interval. g(t)= (t^3/2)(e^-2t) for 0<t<1.

*July 11, 2011*

**Calculus**

Using logarithmic differentiation find the derivative of f(x)=2x/x. I can't seem to figure this out.

*July 11, 2011*

**Calculus**

How did you get (3x-4) from (3x-1) when you took the first derivative?

*July 10, 2011*

**Calculus**

Find the largest and smallest values of the given function over the prescribed closed, bounded interval of: f(x)=(3x-1)e^-x for 0<x<2

*July 10, 2011*

**calculus**

Find the second derivative of: h(t)= (t^2 + 5)^8

*June 29, 2011*

**calculus**

Please disregard. I solved the problem. Thank you anyways.

*June 26, 2011*

**calculus**

A stone is dropped from a height of 144 feet. a. When will the stone hit the ground? b. With what velocity does it hit the ground?

*June 26, 2011*

**calculus**

I believe we have to express it as a function using f(x) and g(x)....not sure.

*June 23, 2011*

**calculus**

At age 15, Nan is twice as tall as her 5-year-old brother Dan, but on Dan's 21st birthday, they find that he is 6 inches taller. Explain why there must have been a time when they were exactly the same height

*June 23, 2011*

**math**

a map is drawn to the scale of 3/4 inch = 50 miles. WHat is the actual distance between two towns that are 1 1/2 inches apart on the map?

*June 22, 2011*

**chemistry**

Under certain conditions, neon (Ne) gas diffuses at a rate of 4.5 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 10.1 centimeters per second. What is the approximate molar mass of the unknown gas?

*May 26, 2011*

**math**

how do you calculate the maximum volume of a cylinder?

*April 17, 2011*

**math**

What is the area of the trapezoid given top is 14, one side is 7, and bottom corner is 65°?

*April 1, 2011*

**math probability**

there are 3 nickles 2 dimes and 5 quarters in a purse. the three coins are selected in succession at random. find the probability of selecting2 nickles , then a quarter.

*March 31, 2011*

**precalc**

How do I calculate the number of images in a particular iteration for a transformation?

*March 13, 2011*

**CRIMINOLOGY**

thank you

*March 11, 2011*

**CRIMINOLOGY**

when it comes to a crime such as extortion, could it be said that greed, fame and/or revenge might be a motivating factor?

*March 11, 2011*

**algebra**

I have to find the square footage of my kitchen floor with the length of one side being 8 inches. So, now I know I can make X=8. f(x)=x^2 is the template needed for this solution. If f(8)= the square footage of my kitchen floor, what will my answer be? f(8)=8^2 f(8)=64 8 was ...

*March 2, 2011*

**Chemistry**

Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)

*February 27, 2011*

**algebra**

is -4 a solution of the inequality? x≥ 4

*February 24, 2011*

**CRIMINOLOGY**

What are some examples of non-monetary restitution?

*February 22, 2011*

**algebra**

You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. Write an inequality that demonstrates how much money you will are willing to spend on the project.

*February 21, 2011*

**algebra please help**

If you enter Interstate 40 at mile marker 23 in Sayre, Oklahoma, how far would you need to travel to reach mile marker 125 in El Reno, Oklahoma? After reaching El Reno, you might worry that your vehicle is running low on fuel. You know that your vehicle can travel 32 miles per...

*February 17, 2011*

**algebra**

. If you enter Interstate 40 at mile marker 23 in Sayre, Oklahoma, how far would you need to travel to reach mile marker 125 in El Reno, Oklahoma? After reaching El Reno, you might worry that your vehicle is running low on fuel. You know that your vehicle can travel 32 miles ...

*February 17, 2011*

**math**

y=-2x+64

*February 17, 2011*

**algebra**

9x2e+4xe+1 ---- xe

*February 16, 2011*

**Math**

i dont know

*February 16, 2011*

**Biology**

If bird DNA is more similar to crocodile DNA than turtle DNA is to crocodile DNA, then... A)birds should be included amoung reptiles B)turtles and birds should be excluded from the reptiles C)the reptiles should be replaced by several new classes D)each of the above represents...

*February 8, 2011*

**algebra 2 **

triangle CAT has vertices C(4,9), A(8,-9),T(-6,5) M is the midpoint of TA . find the length of the median CM

*February 6, 2011*

**algebra 2 **

triangle CAT has vertices C(4,9), A(8,-9),T(-6,5) M is the midpoint of TA . find the length of the median CM

*February 6, 2011*

**history-paul klee**

what contributions did paul klee make in the 1920's?

*February 5, 2011*

**volume**

Jasmine is a manufacturing engineer who is trying to find out if she can use a 20-inch-by-12 inch sheet of cardboard and a 15-inch-by-16-inch sheet of cardboard to make boxes with the same height and volume. Is such a pair of boxes possible? Please give mathematical proof.

*January 23, 2011*

**algebra 2**

a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. B) using a composition of functions represent the situation in which the ...

*January 23, 2011*

**math**

By the cofunction property, cos 33° = sin _______

*January 21, 2011*

**pre ap phsyics**

Sorry for sounding rude thank you for the help.

*January 4, 2011*

**pre ap physics**

Actually i have some classmates over and were working together and we dont all have the same name. Sorry.

*January 4, 2011*

**pre ap physics**

what is the force excerted on the surface of a bowling ball that has a diameter of 32cm immersed in water to a depth of 555m?

*January 4, 2011*

**math**

Ooops i meant you just divide the distance by the time NOT the time by the substance

*January 4, 2011*

**math**

you just divide the time by the distance since he ran at a constant rate

*January 4, 2011*

**math**

Customers lose their bags 8% of the time at airports. 20 random people were watched to see if their bags were lost. Whats the probability that at least 18 of them lost their bags?

*December 14, 2010*

**geometry**

the measure of x is greater than four times the measure of a supplement to it. is this possible? if so, graph the possibilities for c on a number line. if not, explain why not.

*November 30, 2010*

**Verb tense**

Write five sentences abut the roleof education in successful financial planning, in which you correctly use a different verb tensein each sentence. Mark eah ver used in bold and in parentheses identify the specific tense used.

*November 21, 2010*

**general chemistry**

I've been trying to solve these for while now, and i keep getting them wrong.... please help!! A solution of NH4Cl hydrolyzes according to the equation. If the [NH3] in the solution after hydrolysis is 0.00000508 M, calculate the equilibrium concentration of NH4Cl. NH4+(aq...

*November 5, 2010*

**General Chemistry**

What is the molarity of OH- in a 5.78×10-3 M C6H5CO2Na solution that hydrolyzes according to the equation. C6H5CO2-(aq) + H2O(l) = OH-(aq) + C6H5CO2H(aq)

*November 5, 2010*

**Biology**

would it be acceptable with my explanation with enzymes?

*October 24, 2010*

**Biology**

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain why its ...

*October 24, 2010*

**Biology**

I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain why its safe to eat eggs. I know that eggs may sometimes contain bacteria such as salmonella, so if the eggs are heated does it mean that it ...

*October 24, 2010*

**Biology**

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you

*October 24, 2010*

**Quadratic and exponential sequences**

the 6th term is 243.

*October 17, 2010*

**finite math**

Assume that the student has a cup with 15 writing implements: 8 pencils, 5 ball point pens, and 2 felt-tip pens.In how many ways can the selection be made if no more than one ball point pen is selected?

*September 14, 2010*

**finite math**

Assume that the student has a cup with 15 writing implements: 8 pencils, 5 ball point pens, and 2 felt-tip pens.In how many ways can the selection be made if no more than one ball point pen is selected?

*September 14, 2010*

**mental arithmetic**

1 third of 18 kg is

*September 9, 2010*

**Algebra**

Graph each equation by point-plotting? y=-x how would you do this?

*September 1, 2010*

**Math**

sums phonics suptracting

*May 16, 2010*

**math**

How did you get the (7t+5)(7t-5)

*April 9, 2010*

**math**

Use factoring to solve each equation: 49t^2=25 How would u do this? Thank You

*April 9, 2010*

**Math**

Using factoring to solve each quadriatic equation. 2x^2-5x-3=0. This is what I have so far but don't know what to do from here. GCF:1 A:2 B:-5 C:-3 AC:-6 Goal is the find two numbers that add to -5 and multiply to -6 Factors of 6: 1,6 -2,3 (That's the one) I don't ...

*April 9, 2010*

**world history**

who is Rosa Parks relitives

*March 19, 2010*

**math- pre calculus**

you are depositing $1000 dollars in a savings account and are given the following options. 6.2% annual interest rate, compounded annually 6.1% annual interest rate, compounded quarterly 6.0% annual interest rate, compounded continuously for each option, write a function that ...

*March 3, 2010*

**math**

I need help calculating (a) the total installment price. (b) the carrying charges, and (c) the number of months needed to save the money at the monthly rate to buy the item below for its cash price (remember to round up). A bike with a cash price of $500, offered on the ...

*January 26, 2010*

**math coordinate plane**

A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?

*January 21, 2010*

**Chemistry**

25.4. Thank you so much! :)

*January 14, 2010*

**Chemistry**

hi! this question confuses me. "Pennies have mass of approximately 2.5 g. How many pennies are needed to make a mole of copper?" if anyone can help, that would be amazing. <3 Thank you!

*January 14, 2010*

**calc**

Integrate (1/2)^(3x+2)dx using substitution.

*December 6, 2009*

**Science**

What is an element named after a country in the western hemisphere?

*November 18, 2009*

**Science**

What is the element on the periodic table that is named after the sixth largest cantinent?

*November 18, 2009*

**Social Studies**

What are three countries in Eastasia?

*November 2, 2009*

**geography**

If it is Thursday at 11pm in Singapore, what day and time is it in Tokyo?

*September 25, 2009*

**Psychology**

I am writing a paper and do not understand part of this question. The question is as stated: Describe the background, theoretical perspective, and contributions to the field of psychology of the person you have chosen. What is meant when I have to describe their theoretical ...

*August 23, 2009*

**Math**

If f(x)=x^2-2 and g(x)=1/(3x) (x does not equal 0), find (fxg)(-2)

*July 28, 2009*

**chemistry**

I do not understand this at all, can someone explain? Predict how much of 0.3 M NaOH it will take to neutralize 10 mL of 0.1 M HCl.

*May 18, 2009*

**English 4**

bobpursley!!! you're my only hope!! please help!!!

*March 26, 2009*

**English 4**

Well yes...I need at least five...and so far I only have two:((

*March 26, 2009*

**English 4**

bobpursley, THANK YOU SOOOO MUCH!!!! it's just hard finding these freaking quotes!!! lol I just could not find and still cant find any quotes. But you helped me with the theme!!!!

*March 26, 2009*

**English 4**

Thank you! Did you find any more??

*March 26, 2009*

**English 4**

Thank you soooo much!!!

*March 26, 2009*

**English 4**

The book is called "lord of the flies" by william golding.

*March 26, 2009*

**English 4**

Alex that quote is perfect...do you have the page number??

*March 26, 2009*

**English 4**

Okay in chapter four, you know how Jack and the rest of the "hunters" had painted their faces? I have to find at least 5 quotes out of the book to support that "theme". PLEASE PLEASE PLEASE help!!!!! The actual question on the paper reads: -Include at least...

*March 26, 2009*

**English 4**

I have a project due tomorrow and no matter HOW HARD I look I CANNOT FIND any quotes supporting the theme "painted faces" AND I have to document them with the page number!!! Can somebody please help me? I have to have atleast five. Any help would be GREATLY ...

*March 26, 2009*

**English**

The whole point of posting these questions is so I can get help!! I don't have a copy of the book. Please Ms. Sue!! Help meee!!!

*February 17, 2009*

**English**

Lord of the Flies: Chapter 4 Reading and Study Guide I need helppp!!! 16. What does Raplh see in the distance? 17. What happened to the smoke on the mountain? How does Ralph react? 18. What does Jack return with? 19. What do the boys chant upon their return? 20. WHat happens ...

*February 17, 2009*

**Government**

So, there's no way you can help me??

*February 17, 2009*

**Government**

I am working on a test review for Gov't and I cant find any information whatsoever in the text book. The question is... Identify and explain why the following is important... 2. Events leading to the American Revolution: French & Indian War, Albany Plan, Stamp Act Congress...

*February 17, 2009*