Wednesday

December 17, 2014

December 17, 2014

Total # Posts: 111

**calc **

use green's theorem to evaluate the integral of x^2dy where C is the boundary of the rectangle with vertices (0,0),(2,0),(2,3),(0,3) oriented counterclockwise. the answer is 12. can someone please explain
*December 14, 2014*

**calc urgent**

let P be the portion of the disk x^2 + y^2 <= 1, lying in the first quadrant. having mass density of p=x, if the mass of P is 1/3 , find the y coordinate of the center of mass of P. the answer is 3/8
*December 14, 2014*

**Statistics**

also why is X(bar) = E[X] false. Because i thought they both go to mu??
*December 10, 2014*

**Statistics**

why is this sentence false. a statistic is an event computed from a population.
*December 10, 2014*

**algebra**

The Jaspers collect nickels, dimes, and quarters in a jar. When they count the change in the jar, there are twice as many nickels as there are quarters. If there is $15.30 in dimes and $74.80 in all, how many quarters are there. Please include an equation and steps
*December 9, 2014*

**statistics**

A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours a day? b) In a random sample of 10 babies of this age,find the ...
*November 30, 2014*

**statistics**

A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours aday? b) In a random sample of 10 babies of this age,find the ...
*November 30, 2014*

**Geography**

How does location affect climate?
*September 28, 2014*

**math**

why are 10.6 the same as 10.60?
*August 21, 2014*

**physics**

The oscillator that generates a wave completes 47 vibrations in 29.2 s. A given crest of the wave travels 382 cm along the rope in a time period of 10.3 s. What is the wavelength?
*April 22, 2014*

**English**

Consider both Hamlin Garland's "The Return of a Private" and Mark Twain's "The Notorious Jumping Frog of Calaveras County" as works of regionalist fiction. In a response of at least two paragraphs, compare and contrast these stories as examples of ...
*December 15, 2013*

**ALGEBRA**

Thank you so very much!
*December 1, 2013*

**ALGEBRA**

8^1/3 / 64^1/3
*December 1, 2013*

**algebra I**

a rectangle has a perimeter of 26 cm and one of its sides has a length of 5cm sketch the rectangle and label all of its side lengths
*August 21, 2013*

**Math**

A spool contains 9 meters of ribbon. How many 0.225-meter pieces of ribbon can be cut from the spool?
*April 17, 2013*

**math**

find the solution of the following system of equations x-y=0 x+y=4
*April 2, 2013*

**math**

A spherical water tank holds 15000ft^3. What is the diameter of the tank? Use V=pie/6*d^3
*March 23, 2013*

**English**

i need that answer!!!!
*March 20, 2013*

**English**

Idk that one ^ :/
*March 20, 2013*

**Chemistry**

22.) The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of liquid water is 4.18 J/gC. (1) What quantity of heat is required to melt 25.0 g of ice at 0C? (2) What quantity of heat is required to ...
*March 5, 2013*

**math**

i have a garden 22meters long and 14 meters wide how do i find the area ana the perimeter
*February 13, 2013*

**math 4th grade**

I dont know
*February 6, 2013*

**math 4th grade**

I dont know
*February 6, 2013*

**Physics PLEASE HELP!**

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and a net charge of +6.5...
*January 28, 2013*

**Math**

what is the answer
*January 23, 2013*

**math**

dara has 5 coins in her purse the coins total 40 cents
*January 22, 2013*

**Accounting**

good such as milk bread and chesse would problably be costed using what method of inventory costing
*January 4, 2013*

**Math (Ms. Sue Please help!)**

can you help me
*January 2, 2013*

**Math**

There are 18 bottlenose dolphins at an aquarium. One sixth of the bottlenose dolphins are not adults. How many of the bottlenose dolphins are not adults?
*December 17, 2012*

**Math**

six friends share 5 small pizzas. Each friend first eats half of a pizza. How much more pizza does each friend need to eat to finish all the pizzas and share them equally?
*December 17, 2012*

**Tobin School**

the plane goes 700 miles an hour . The car goes 50 miles an hour . How many times faster than the car is the plane .
*November 25, 2012*

**Biology**

I need to make a cell membrane model out of a tissue box. Can you help me? I need ideas and more information about it.
*November 12, 2012*

**math**

what is multiplication sentence in exponent and base
*October 2, 2012*

**English **

Which one does not belong o? On April. December. November. June
*September 26, 2012*

**grammar**

Please turn of lights when you go to sleep.
*August 10, 2012*

**factor the trinomial by grouping**

15x^3-9x^2-6x Can someone please show me how to factor completely.. trying to learn how to do factoring
*June 14, 2012*

**please help math factor trinomial**

Thank you soo much.. I have a lot of trouble with factoring
*June 14, 2012*

**please help math factor trinomial**

y^3-13y^2+36y Can someone please show me step by step that way I can understand. Thank you
*June 14, 2012*

**Algebra HELP! **

If a sum of money is deposited in a savings account that is paying x percent annual interest (expressed as a decimal), then this sum of money increased by a factor of (1+x)^3 after 3 years. A. multiply this expression B. Evaluate the polynomial expression found in part (A) for...
*June 11, 2012*

**Math Algebra Multiply**

(a+3)^3 is answer: 3a+9a+9 12a+9
*June 11, 2012*

**SUBTRACT POLYNOMIALS**

(9X+8)-(-7X+9) IS ANSWER: 16X-1?
*June 11, 2012*

**Add the Polynomials**

(9X^3+2X^2-7)+(2X^3-2X+9) IS ANSWER: 11X^3+2X^2-2X+2
*June 10, 2012*

**Math Algebra**

Determine whether the expression is a polynomial, if it is state how many terms and variables the polynomial contains. then state the degree 7x^2+3x+3
*June 10, 2012*

**Algebra Divide**

x^8+x^5/x Please help im stuck
*June 7, 2012*

**Math Algebra Find the Product**

(4y+5)(4y-5) 16y^2-20y+20y-25 16y^2-25 Am I correct
*June 7, 2012*

**math multiply and simplify**

12s^2-9s-4s+3 = 12s^2-6s+3
*June 7, 2012*

**math multiply**

Thank you
*June 7, 2012*

**math multiply**

8xy(x+y) is answer 8x^2y+8xy^2
*June 7, 2012*

**math algebra**

yay! Thank you
*June 7, 2012*

**math algebra**

multiply and simplify (4-z)z =4z-zsquare? can you please let me know if I am correct
*June 7, 2012*

**Math add the polynomials**

so its 4a^2b^8?
*June 7, 2012*

**Math add the polynomials**

ahh so the 7ab cancels because of the -7ab so answer is 5a²b4. I thought it was 4a4b8 Thank you
*June 7, 2012*

**Math add the polynomials**

(7ab+4a2b4)+(a2b4-7ab) The 2 and 4 are on top of the a and b. (sqare #)
*June 7, 2012*

**Math**

Determine whether the expression is a polynomial, if it is state how many terms and variables the polynomial contains. state the degree -4x-2y-1 the -2 and -1 are above the Y
*June 5, 2012*

**algebra**

Determine whether the expression is a polynomial. If is is state how many terms and variables the polynomial contains. State the degree -7-1/4x
*June 5, 2012*

**Comm 215**

Thank you!
*May 29, 2012*

**Comm 215**

Thank you! So much 28. Choose the appropriate irregular verb form in the following sentence. I was surprised by how successful Janice ____. __ become __ becomed _x_ became __had became
*May 29, 2012*

**Comm 215**

Please guideme to which ones are wrong.. Thank you Grammar Part I: True or False 1. The following word group is a FRAGMENT: That movie, one of my favorites. x_True __False 2. The following word group is a FRAGMENT: The local baseball team, needing a good pitcher most of all. ...
*May 29, 2012*

**Rydberg equation**

λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 6.
*February 13, 2012*

**chemistry**

λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 6.
*February 13, 2012*

**chemistry**

A H atom absorbs a photon with a wavelength of 9.50 × 10^1 nm. If the energy of the final state of the H atom was -8.72 × 10^(-20) J, calculate the energy of the initial state. Express answer in scientific notation
*February 3, 2012*

**chemistry**

thank you very much that was great help..
*January 31, 2012*

**chemistry**

A light photon with a frequency of at least 0.0906 x 10^16 Hz is required to split apart hydrogen bromide according to the equation: HBr(g) --> H(g) + Br(g) Calculate the energy (kJ) required to break apart a mole of hydrogen bromide. Express answer in scientific notation.
*January 31, 2012*

**chemistry**

A light photon with a frequency of at least 0.0906 ~ 1016 Hz is required to split apart hydrogen bromide according to the equation: HBr(g) ¨ H(g) + Br(g) Calculate the energy (kJ) required to break apart a mole of hydrogen bromide. Express answer in scientific ...
*January 31, 2012*

**chemistry**

use the equation d=m/v
*January 31, 2012*

**Math**

∫sin^5 t/cos^2 t dt
*January 26, 2012*

**chemistry(balance equation)**

C2H6 + O2 --> CO2 = H2O
*January 19, 2012*

**Business Finance**

Meg's pension plan is an annuity with a guaranteed return of 3% per year (compounded quarterly). She would like to retire with a pension of $30,000 per quarter for 10 years. If she works 22 years before retiring, how much money must she and her employer deposit each quarter?
*January 19, 2012*

**English **

Hi, I'm having trouble understanding this and relating it back to my area of study, "belonging"- "In this regard, Emily Dickinson's poetry repeatedly echoes Voegelin's analyses of consciousness and existence. For Emily Dickinson, to be hman is to BE...
*October 29, 2011*

**physics**

A 14 g bullet is ﬁred into a 120 g wooden block initially at rest on a horizontal surface. The acceleration of gravity is 9.8 m/s^2 . After impact, the block slides 6.97 m before coming to rest.If the coeﬃcient of friction between block and surface is 0.568 , ...
*October 14, 2011*

**english**

which are stressed syllables in not lured by any cheat of birth
*October 7, 2011*

**Math**

In the equation ax^2+bx+c=0, one root is the square of the other. Without solving the equation, prove that c(a-b)^3=a(c-b)^3
*September 11, 2011*

**Math**

If a,b,c are the roots of x^3-2x^2+x-3=0, find the value of (b+c)(c+a)(a+b)
*September 9, 2011*

**Math**

A man runs to a telephone and back in 15 minutes. His speed on the way to telephone is 15 m/s and his speed on the way back is 4m/s. Find the distance to the telephone.
*August 29, 2011*

**english**

I re-did my but I am still having problems with subject verb agreements and other grammar issues. I have posted a revised version here: What is sociology and cultural anthropology? The sociology field involves investigating groups of individuals who influence a nation, state, ...
*July 10, 2011*

**english**

Thank you soooooooooooooooo much for your help.
*July 10, 2011*

**english**

can someone help me revise/edit my anthropology survey paper Here is my paper attached to the question: Sociology in general, is the study of societies and groups of people that have familiar backgrounds, interests, or institutions. Some examples of society are countries, ...
*July 10, 2011*

**geometry**

. If the pizza is cut into 12 congruent pieces, how many degrees are in each central angle?
*May 31, 2011*

**Business Calculus**

A company has operating costs of $2000 per thousand items produced. Its revenue function can be modeled by the equation: R(x)=30x/(x+2)² , where x is measured in thousands of items produced, and C and R are measured in thousands of dollars (so C(x)=2). 1. Determine the ...
*March 25, 2011*

**Writing**

no where
*February 7, 2011*

**Physics**

Four coulombs of positive charge flow from the +6 V positive terminal of a battery to the negative terminal at 0V. What is the charge in potential energy of the charge.
*January 19, 2011*

**Math**

Hey I Know The Answer.. Can I Help You??
*January 13, 2011*

**Math**

Whats The Math Problem?? Maybe I Can Help..!! :)
*January 12, 2011*

**physics**

lake point tower in chicago is the tallest apartment biulding in the united states (although not the tallest biulding in which there are apartments). supose you take the elevator from street level to the roof of the biulding. the elevator moves almost the entire distance at ...
*January 6, 2011*

**chemistry **

I think it's: aluminum + iron(III) oxide --> iron + aluminum oxide Fe2O3 + 2Al --> Al2O3 +2 Fe
*December 5, 2010*

**Chemistry**

1) The structure of graphite is very unlike any other substances. It is composed of sheets of carbon atoms, and each of these is bonded to only three other atoms. This leaves the fourth valence electron of the carbon atom delocalized, which means it is free to move between the...
*December 5, 2010*

**Physics**

A man uses a pulley arrangement to lift a heavy crate.He applies a force that is one-fourth the weight of the crate, but moves the rope a distance four times the height that the create is lifted. Is the work done by the man greater than, equal to, or less than the work done by...
*November 14, 2010*

**Physics**

A 3.0 kg block being pulled across a table by a horizontal force of 80 N also experiences a frictional force of 5 N. What is the acceleration of the block?
*July 14, 2010*

**geometry**

i need to find the area of the trapezoid 8cm,7cm,3cm,45degrees
*May 27, 2010*

**4th grade math**

wat is an EG not egg but EG pattern?
*May 9, 2010*

**9th grade**

What are the similarities of ozone depletion and uv light
*March 8, 2010*

**Algebra**

Thank you :D That really cleared it up! I never had anyone explain that concept so well before.
*October 28, 2009*

**Algebra**

I had to solve the function g of f where f is x^2+1 and g is sq. root of x. I wrote this out as the sq. root of x^2+1. The ^2 and the sq. root canceled each other out, so I was left with x + sq. root of 1. But my book got sq. root of x^2+1. Was the further reducing I did ...
*October 28, 2009*

**Algebra**

I distributed 3x^2+x-10=f(x) to find the zeroes. My book's answer was (3x-5)(x+2). When I distributed this to make sure I got the original function, I got 3x^2-x-10. Is this still an acceptable way to factor it even though the x is negative instead of positive as it should...
*October 25, 2009*

**Algebra for Reiny/Bob**

The way my book has it is (1/2x^3)-x. Sorry for the confusion
*October 25, 2009*

**Algebra**

How do you factor 1/2x^3-x so that the zeroes can be found? Thank you-Adriana
*October 24, 2009*

**math**

how do you ger the square root
*September 16, 2009*

**science**

list the bodies of water that collects rain when it falls?
*May 4, 2009*

**geography**

what is the capital of burkina faso?
*March 16, 2009*

**1st grade**

breakfast is served between 6:30am and 10:30am
*March 13, 2009*