Thursday

December 8, 2016
Total # Posts: 1,288

**Geometery**

How would I calculate the perimeter of a hexagon (which can be divided into 6 congruent equilateral triangles) which is inside a circle with an area of 314^2 cm? Many thanks

*May 13, 2010*

**Math**

How would I calculate the perimeter of a hexagon (which can be divided into 6 congruent equilateral triangles) which is inside a circle with an area of 314^2 cm? Many thanks

*May 11, 2010*

**Algebra**

Hi, how would I factorise x^2-100?

*May 7, 2010*

**College Chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

*May 6, 2010*

**Chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

*May 6, 2010*

**polymer chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

*May 5, 2010*

**chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

*May 5, 2010*

**math**

A sheet of plywood measures 4 feet by 8 feet. Armand wants to build a dog house using one whole sheet of plywood for the floor. a. Armand needs to put a "2 by 4" under the outer edges all the way around the floor, and another "2 by 4" that runs down the ...

*May 4, 2010*

**Chemistry 102**

For a question like “calculate the pH of an aq.solution that is 1.0 M CH3COOH and 1.0 M CH3COONa, how do you know to write the equation like this: CH3COOH + H2O => H3O+ + CH3COO- and not like H3O+ + CH3COO- => CH3COOH + H2O for the ICE chart. This would switch the ...

*May 3, 2010*

**chemistry**

SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. The partial pressure of CO2 in the container was __________ atm.

*May 2, 2010*

**Physics**

given; r2 = 0.05 m r1 = 0.01 m Q = 10 liters/min = 10 E-3/60 = 1.67 E-4 m³/s P2 = 10^5 Pa ρ = 1000 kg/m³ no. # (a) Q = (A2)(v2) Q = π(r2)²)(v2) 1.67 E-4 = π(0.05)²)(v2) V2 = 0.0212 m/s no. # (b) V1 = (r2/r1)² (V2) = (5/1)² (0.0212) ...

*April 27, 2010*

**Physics**

A) V1= 10L/((pie)(.05^2)(1000)(60))=.0212m/s B) V2= 10L/((pie)(.01^2)(1000)(60)=.5307m/s C)P=P1 - P2 = 1000*[(.0212)²/2 - (.5307)²/2] P1 - P2 = 140.5 Pa P2 = 10^5 - 140.5 = 99859.5 Pa.

*April 27, 2010*

**Math 102**

if you have a pizza with a diameter of 20 that is cut equally into 4 pieces, one way horizontal and one way vertical. how do i figure out where to place 2 non-center vertical cuts so that the pizza has 8 equal parts? i found the area for the circle to be 314.159 (divided by 8...

*April 27, 2010*

**5th grade**

Find the numbers that each letter stands for in the problem below. EFGH X 4 = HGFE E= F= G= H=

*April 22, 2010*

**Science**

That depends on the density of the object along with bouyancy. A 2g rock will sink in water whereas a 2000 kg boat will not (if made right). It doesnt matter what something weighs. An object floats because it displaces an amount of water equal to or more than its own weight. A...

*April 22, 2010*

**math**

Essentially you look for key words. "At most", "no more than", "does not exceed", etc. would mean less than or equal too. Taking your example, if the cost is at most $4857.95, then it could be less, but it cannot be more. When x is less than or ...

*April 21, 2010*

**chemistry**

I did the moles of Cl found/1 L = .00863. 1.8e-10 / .00863 = 2.1e-8 * 1 L = 2.1e-8 moles .0010 / 2.1e-8 = 47619 L*1000 mL / .5 but the answer comes out wrong=/

*April 21, 2010*

**chemistry**

ag2so4 ksp = 1.5 e10-5

*April 21, 2010*

**chemistry**

A certain municipal water sample contains 46.1 mg SO42-/L and 30.6 mg Cl -/L. How many drops (1 drop = 0.05 mL) of 0.0010 M AgNO3 must be added to 1.00 L of this water to just produce a precipitate? What will this precipitate be? how do i do this problem? agcl ksp = 1.8 e-10

*April 21, 2010*

**Chemistry 102**

A certain municipal water sample contains 46.1 mg SO42-/L and 30.6 mg Cl -/L. How many drops (1 drop = 0.05 mL) of 0.0010 M AgNO3 must be added to 1.00 L of this water to just produce a precipitate? What will this precipitate be? How do i start this question? please help

*April 21, 2010*

**Chemistry 102**

The Ksp for cerium iodate, Ce(IO3)3 is 3.2 e-10. What is the molar solubility of Ce ion in pure water? = .0019 M B) A 0.031 M sodium iodate is added as a common ion. What is the concentration of Ce ion with the common ion present? C) What is the ratio of the Ce ion with the ...

*April 21, 2010*

**math**

mix and match the shake sizes to equal using 3 cups

*April 14, 2010*

**math**

Liann works in the old time soda shoppe the shop sells shakes. a single shake uses 1/8 cup syrup, a double shake uses 1/4 cup syrup, a tripple milk shake uses 3/8 cup syrup. How many shakes can she make of each with 3 cups of syrup?

*April 14, 2010*

**science**

Given the following reaction, with Kp=1.05 at 250 degrees C what is Kc? The reaction is PCl5 to PCl3+Cl2

*April 13, 2010*

**math-trigometric functions and radians**

what is the tangent of pi/5, the cotangent of pi/7, and the co secant of pi/6?

*April 12, 2010*

**Algebra II**

I'm trying to factor this and I just can't figure it out. Help? r^4 s^4 - 81

*April 11, 2010*

**calculus high school**

Chain Rule with single variable: d/dx [3(2x-4)^2] =6(x-4)(2)=12x-48 Chain Rule with multiple variables: d/dx [3y^2] =6y(dy/dx) The y and the (x-4) terms serve a similar function. You technically use the chain rule all the time. The derivative of a variable, like x, is simply 1...

*April 8, 2010*

**Geography**

that link ^^^^^^^^^^^ is a dead link buddy :P

*April 7, 2010*

**English**

and the adverb

*April 5, 2010*

**English**

Type the complete adjective or adverb phrase in this sentence. The red coat was sent by my aunt. Adjective/adverb phrase:_________

*April 5, 2010*

**English**

Type the complete adjective or adverb phrase in this sentence. The house with the green shutters is quaint. Adjective/adverb phrase:________

*April 5, 2010*

**English**

Identify the type of conjunction in the following sentence. We'll be able to eat when Grandma arrives. A)conjunctive adverb B)coordinating conjunction C)correlative conjunction D)subordinating conjunction

*April 5, 2010*

**English **

lolz thanks

*April 5, 2010*

**English**

sorry its someone

*April 5, 2010*

**English**

Type the correct personal pronoun in place of the noun or nouns in parentheses. I'm not sure it's a good idea to give the candy to (the children) ____? .

*April 5, 2010*

**English **

Identify the word in bold type. THIS is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

*April 5, 2010*

**English **

Type the correct pronoun in the box. Each of the students must give ___?___ presentation next Tuesday

*April 5, 2010*

**English **

sorry the word is dog

*April 5, 2010*

**English **

Identify the word in bold type. This is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

*April 5, 2010*

**English **

Identify the word in bold type. None of those bagels look fresh. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

*April 5, 2010*

**English **

Select the correct pronoun: "Go find ___ and say what you have to say." A)him B)he

*April 5, 2010*

**chemistry**

5.1 L

*April 2, 2010*

**math-word problem- PLEASE CHECK MY ANSWER**

tickets for a school sell for $8 for floor seats and $6 for balcony seats. For one performance 72 tickets were sold, bringing in $516. how many tickets were sold

*March 28, 2010*

**math**

what percent of 300 is 60 F)20% G)50% H)2% J)5% i think I'm just doing it wrong because i got (180) and then the 2 time i got (500) so do you mind telling me what Am doing wrong

*March 23, 2010*

**math**

but i get 4/5 then the answer would be k then right

*March 23, 2010*

**math**

oh oh i just thought that it would be f cause it's just .5 off

*March 23, 2010*

**math**

what percent of 80 is 32 F)25% G)2.5% H)0.4% J)40% K)none i got 25.6% what is it then

*March 23, 2010*

**science**

Liters and milliters are used for measuring?

*March 11, 2010*

**science**

mass is usually measured in?

*March 11, 2010*

**Science**

Which foods contain solids,liquids, and gases?

*March 9, 2010*

**science**

Which foods contain solids,liquids, and gases?

*March 9, 2010*

**World HIstory**

What is the Rescue of Dunkirk?

*March 7, 2010*

**biology**

its know that high plumage color in birds causes then to compete for nests better than dull birds. how does the hypothesis that males with high plumage color make offspring high plumage color support the first statement?

*February 24, 2010*

**chemistry**

A dilute sulfuric acid solution that is 3.39 molality H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution?

*February 23, 2010*

**Chemistry**

its m = molal

*February 23, 2010*

**Chemistry**

A dilute sulfuric acid solution that is 3.39 m H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution? 3.39 is 3.39 Molality not molarity

*February 23, 2010*

**world history**

how did japan and china feel about the europeans

*February 21, 2010*

**MATH**

M + 6 = 4XM M=? ON A COORDINATE GRIDE, WHAT IS THE DISTANCE FROM A(4,9) TO B (4,3)

*February 17, 2010*

**math**

using 1,2,3,4 only one time and must equal 29

*February 17, 2010*

**history**

how does this answer what i put

*February 16, 2010*

**history**

A formal, systematic essay or book on some subject is called a

*February 16, 2010*

**Chemistry**

If you have 108 grams of Al and 108 grams of O subscript 2 which reactant is the limiting reactant?

*February 15, 2010*

**Chemistry**

If you have 4.00 moles Al(aluminum), how many moles of O (oxygen)subscript 2 are needed for a complete reaction?

*February 15, 2010*

**Science**

A tiltmeter is a volcanic monitoring tool that measures _____. a)vibrations and tremors in the ground b)smoke plumes c)ground swelling d)water levels do you mind exp it a little bit better thanks

*February 15, 2010*

**World Geography **

thanks a lot

*February 15, 2010*

**World Geography **

please Write a short essay comparing the ways in which command economies and market economies affect a worker's life? or if you want exp it a little better to me.

*February 15, 2010*

**social studies**

how did china and Japan feel about the europeans moving westward

*February 14, 2010*

**prealgebra**

3/5y+8 ------ 3/5y-8 simplify

*February 13, 2010*

**prealgebra**

3/5y+8 ------ 3/5y-8 simplify

*February 13, 2010*

**Science -CLIMATE**

Explain how different temperatures on earth create winds.

*February 7, 2010*

**geometry**

what is a quadrilateral shape with adjacent sides not equal; 2 pairs of conguent sides; 4 right angles?

*February 3, 2010*

**algebra**

Simplify 5-3(x-1) what are the steps?

*January 27, 2010*

**science**

why don't earthquakes form on the san andreas fault?

*January 20, 2010*

**Literature**

It was very well written, I hope you got a good grade.

*January 19, 2010*

**Math**

The sum of my two digits is 13. I am not divisible by 2. List all possible numbers I could be.

*January 14, 2010*

**Trigonometry**

these values right? tan theta=2/3 sec theta=Squareroot(13)/3 sine=2xSquareroot(13)/13 Cos=3xSquareroot(13)/13 Tan=2/3 Cosecant=Square root (13)/2 Secant=Squareroot(3)/3 Cotangent=3/2

*January 10, 2010*

**spanish 2**

were learning about affirmative/negative usted/tu commands and on the model it says "Tenemos pelo sucio. (el perfume)" and then the answer is "no lo compren" why compren, why not compre?

*January 10, 2010*

**geometry**

the measure of two sides of a triangle are 15 and 18. Between what two numbers must the measure of the third side fall?

*January 6, 2010*

**9th grade**

x=6. it's pretty simple haha.

*December 23, 2009*

**Analytic Geometry**

x^2-y^2-6x+8y-3=0 Find the center vertices, foci, and asymptotes for the hyperbola.

*December 17, 2009*

**algebra**

Yes, I agree. I have used synthetic division to solve for 3+i and 3-i, giving me two answers. But because the highest degree of exponents is x^4 then I can expect to find four answers right?

*December 17, 2009*

**chemistry**

If a compound's empirical formula is CH2O and its' formula mass is 120.12 amu, what is its' molecular formula

*December 13, 2009*

**Math**

Three neighbors are sharing a rectangular strip of land fir a garden. They divide the land into 24 equal-sized pieces. What fraction of the land does each person get if they share it equally? Write the answer in more than one way

*December 8, 2009*

**Math**

The Lappans buy 3 large sandwich wraps to serve at a picnic. 9 people in all will be at the picnic. Show 3 different ways to cut the sandwiches so that each person gets an equal share.

*December 8, 2009*

**Math**

cheryl, rita and four of their friends go to a movie and share equally a 48-ounce bag of popcorn and three 48-inch licorice laces. Find the fraction of popcorn each gets and the fraction of licorice each gets.text

*December 8, 2009*

**8th grade Algebra I (junior level math)**

How do i solve proportions? step by step answers plz!!!! EXAMPLE! g/5 = 6/10

*December 1, 2009*

**7th grade**

Pi times r squared

*November 28, 2009*

**9th grade Geography**

d then

*November 24, 2009*

**9th grade Geography**

Africa

*November 24, 2009*

**9th grade Geography**

Which of the following statements about manufacturing in the region is NOT true? a. About 50 percent of the region’s GDP comes from manufacturing. b. Demand for manufactured goods has increased. c. Workers produce textiles, paper goods, and cement. d. Locally produced ...

*November 24, 2009*

**8th grade math**

Hi i need one more example of this algebraic expression please. and explain please. Fig# Value 1 0 2 1 3 8 4 27 Math-Nick

*November 22, 2009*

**math**

Hi i need one more example of this algebraic expression please. and explain please. Fig# Value 1 0 2 1 3 8 4 27 Math-Nick

*November 22, 2009*

**8th grade**

Hi my class is doing a unit on patterns with algebraic expressions. And i need to find a difficult expression Figure# Term value 1 8 2 27 3 64 4 125 what is the algebraic expression and how did u do it? thank you. Math-Nick

*November 22, 2009*

**math**

2 is the only blank prime

*November 20, 2009*

**6th grade**

1- At the bottom of the classes were Slaves and Farmers - they represented the greatest percent of the Egyptian population. The workers supported the professionals above them, just as the base of the pyramid supports the rest of the structure 2- Above were skilled Craftsmen 3...

*November 19, 2009*

**Probability**

A coin is tossed 7 times. What is the probability of getting four heads. My teacher said that there is a formula involved but i don't know which one. How do i set it up?

*November 19, 2009*

**social studies**

what colonies did the French found as a result of searching fo rthe Northwest Passage?

*November 18, 2009*

**School**

Sorry, I meant how can you prove that the equation of any circle with radius (r) and the center at the origin is x^2+y^2=r^2?

*November 17, 2009*

**School**

How can you prove that the equation of any circle with radius (r) and the center at the origin is x^2+y^2=36? Please help!?!

*November 17, 2009*

**Grammar**

In the following sentence I think ambition is a noun that is an idea. Is that right? The strong supporter of the League of Nations had great ambitions.

*November 17, 2009*