# Posts by jen

Total # Posts: 3,504

**College Math**

Determine whether the pairs of sets are equal, equivalent, both, or neither. A = {7, 9, 10}, B = {a, b, c}

*July 5, 2011*

**Math**

Express each set in set-builder notation: Set D is the set of natural numbers between 27 and 51, inclusive.

*July 5, 2011*

**Damon or Sue please help!!**

oh thank you so much!! i was totally off...

*July 5, 2011*

**Damon or Sue please help!!**

Find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm.

*July 5, 2011*

**Math**

Find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm.

*July 5, 2011*

**College Math**

Find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm.

*July 5, 2011*

**college math**

Find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm.

*July 5, 2011*

**Chemistry**

When hot and concentrated, sulfuric acid is a fairly strong oxidizing agent. Write a balanced net ionic equation for the oxidation of metallic copper to Cu(II) ion by hot concentrated H2SO4, in which the sulfur is reduced to SO2.

*June 30, 2011*

**algebra**

L=w+2 L x w = 63 (w+2) x w = 63 w^2+2w=63 w^2+2w-63=0 What two factors multiply to -63 and add up to 2? 9 and -7. L=9, W=7

*June 19, 2011*

**mathw**

a pair of dice is rolled. find the probability that the sum of the dice is an odd number. also, find the probability that the sum is a 5 or 10 given that an odd sum is rolled

*June 16, 2011*

**Physics**

Imagine that your car is powered by a fusion engine in which the following reaction occurs. 3*deuterium--->helium + hydrogen + neutron The masses are (2.0141 u), (4.0026 u), (1.0078 u) and (1.0087 u). The engine uses 8.1 10-6 kg of deuterium fuel. If one gallon of gasoline ...

*June 3, 2011*

**Logistics**

Hi, I am taking a logistics class online through University of Phoenix and I am so lost. I have homework dure tonight and have no idea how to do it. Can anyone help?

*May 29, 2011*

**math**

The answer is417.62 after finding the area of both objects and subtracting them

*May 17, 2011*

**Economics**

Did you ever find the answer to this. I am working on it for my final now.

*May 10, 2011*

**physics-sun**

a 1 square meter solar panel receives a total of 1000Watts from the sun. If we assume all the energy is release through nuclear fusion from the sun what is the total output from the sun?Given you know the total mass of the sun and have just calculated the total output assume ...

*May 9, 2011*

**physics-buoyancy**

Use Archimedes' law of buoyancy. - to calculate what fraction of the volume of an iceberg floating in the ocean is above the water level. -how many 20kg penguins can be supported by a 1000 cubic meter iceberg that is on the verge of being completely submerged?

*May 8, 2011*

**Geometry**

How do you find the ratio if the areas of 2 similar triangles in which the ratio of a pair of corresponding sides is 4:1

*May 7, 2011*

**English**

Choose the sentence with the grammatical error below. Answer A Seeking food in the rain-forest canopy, common marmosets often live in proximity to spider monkeys, which are ground-dwellers. B A consummate craftsperson, the lace doilies are made with more than fifty separate ...

*May 6, 2011*

**English**

Choose the sentence with the grammatical error below. Answer A In his autobiography, Benjamin O. Davis, Jr., who in 1970 retired from the Air Force as a three-star general, describes his efforts to gain professional recognition for himself and for other black servicemen. B ...

*May 6, 2011*

**English**

Choose the sentence with the grammatical error below. Answer A Aristotle studied under Plato then later in his life he tutored Alexander the Great. B Some people consider a four-leaf clover a sign of good luck. C Before the invention of the printing press, monks copied books ...

*May 5, 2011*

**English**

Choose the sentence with the grammatical error below. Answer a. Although hemp and jute have similar qualities, they come from different plants. b. Traditionally made with bits of colored glass and mirrors, kaleidoscopes today may incorporate plastics and high-tech materials. c...

*May 5, 2011*

**chemistry**

write out the reactions that convert the chromate ion into chromium peroxide.

*May 3, 2011*

**Trig**

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?

*April 28, 2011*

**Trig**

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?

*April 28, 2011*

**Trig**

What is the period of f(x)= 1/2 tan(3x+pi/2) and -2/3 cos(x/3-1/2)?

*April 28, 2011*

**Calculus**

find the volume OUTSIDE the cylinder x^2+y^2=9 and INSIDE the sphere x^2+y^2+z^2=25

*April 25, 2011*

**Intro to Statistics**

13/52 * 25/51 = 25/204

*April 17, 2011*

**Physics**

A 120-V rms voltage at 1000 Hz is applied to a resistor and an inductor in series. If the impedance of this circuit is 110 Ù, what is the maximum value of the current?

*April 13, 2011*

**Physics**

In a thundercloud there may be an electric charge of 18 C near the top of the cloud and −18 C near the bottom of the cloud. If these charges are separated by about 7 km, what is the magnitude of the elec- tric force between these two sets of charges? The electric force ...

*April 8, 2011*

**physics**

Electrons in a beam incident on a crystal at an angle of 300 have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5A0, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing through ...

*April 7, 2011*

**Economics**

1. You read the following information about the economy: Real GDP up three percent from a year ago. Unemployment rate of 6.1 percent. Consumer Price Index up six percent from a year ago. Index of Leading Indicators up for the last six months. Prime interest rate of ten percent...

*April 5, 2011*

**chemistry**

can someone please explain to me in dummy language this question... Why is the graph of transmittance versus concentration not linear?... Thankyou very much

*April 2, 2011*

**math**

Milan's gas tank is 1/5 full. After he buys 6 gallons of gas, it is 7/10 full. How many gallons can Milan's tank hold?

*March 23, 2011*

**physics**

A backpack full of books weighing 43.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 150 N/m is attached to the backpack and pulled horizontally, as indicated in the figure. If the spring stretches by 2.30 cm, what is the coefficient ...

*March 22, 2011*

**physics**

a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with 12 zeros) ...

*March 20, 2011*

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

*March 17, 2011*

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

*March 17, 2011*

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

*March 17, 2011*

**trigonometry**

what is the diameter of three circle inscribed in a triagle whose base is 50 cm.

*March 17, 2011*

**chemistry**

what is a common household example of a colloid, besides milk?

*March 14, 2011*

**Geometry**

If the diagonal of a square has a length of 10 suare root of 2 cm, find the area of the square and the perimeter of the square.

*March 13, 2011*

**geometry**

The diagonals of a rhombus are in 2:1. If the perimeter of the rhombus is 120cm, find the length of the diagonals.

*March 13, 2011*

**Chemistry**

How many moles of nitrogen are in 5.0×10−2 mole of quinine?

*March 13, 2011*

**algebra**

3-p=8p 3=9p 1/3=p

*March 11, 2011*

**chemistry**

I don't understand this zwitterion form . Here is the question. write the zwitterion form of the amino acid cysteins shown in the follwing figure. If the pI for cysteine is 5.1 at what pH will the zwitterions be the predominant form? Can you please show me step by step on ...

*March 9, 2011*

**chemistry**

I am not understanding this molarity stuff. Can someone please show me step by step on how to solve this question? What is the molarity of 0.50 L of solution containing 40.0 g of CaCO3?

*March 9, 2011*

**geometry**

The height of a loading platform is 4 feet. Determin the length of the ramp if it makes a 32 degree angle with the ground.

*March 7, 2011*

**Physics**

A 1220 kg car rounds a circular turn of radius 19.2 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.66, how fast can the car go without skidding?

*March 4, 2011*

**math**

2x + 4=4y + 4 Find the value of x.

*March 3, 2011*

**science**

what happens when an ocean wave hits an oil spill?

*March 3, 2011*

**chemistry**

If a 190 mg piece of gold (density =19.32 g/cm^3) is hammered into a sheet measuring 2.3 x 1.0 ft, what is the average thickness of the sheet in meters?

*March 2, 2011*

**physics**

13.1 N/m

*February 24, 2011*

**chemistry**

How do you calculate, as an example, [Fe3+] which remained unreacted in a solution, i.e. the equilibrium molarity of Fe3+? The actual question being, on my part, what equation would you use to figure this out? How would you solve this?

*February 23, 2011*

**math**

-n-4 -6s 192-8n (-30)(-20)=600 14

*February 21, 2011*

**math**

repeat question, already answered

*February 21, 2011*

**Math**

Gina flew from Toronto to Chicago and back again. The average speed of the plane was 332 km/h to Chicago and 415 km/h back to Toronto. If the actual flying time for the round trip was 4.5 h, how far is it from Toronto to Chicago?

*February 18, 2011*

**spanish**

I believe el mayor is right, but I am unsure about the first one.

*February 17, 2011*

**Physics**

A 15.0 kg box is released on a 32 degree incline and accelerates down the incline at 0.30m/s sqaured ? find the friction force impeding its motion. What is the coefficient of kinectic friction?

*February 15, 2011*

**Physics**

a force of 48.0N is required to start a 5.Okg box moving across a horizonatl concrete floor.what is the coefficient of static friction between the box and the floor?If the 48.0-N force continues, the box accelerates at 0.70 m/s squared . What is the coefficient of kinetic ...

*February 15, 2011*

**algebra**

V=1/3*6300*7 solve for V The answer is V=14700 how do you change 1/3 to a decimal or use 1/3 to solve the equation?

*February 14, 2011*

**math**

A man borrows $50,000 towards the cost of a house. Compound interest is charge on the loan at 125 per annum. He agrees to pay back the loan in 25 equal installments, at yearly intervals, the first repayment being made exactly 1 year after the loan is taken out. Calculate the ...

*February 13, 2011*

**TRIG**

2sin@ + 3 = 2 2sin@ = -1 sin@ = -1/2 @ = 210, 330 convert to radians if desired

*February 13, 2011*

**maths**

let x be the number of green ones blue one = 6x

*February 13, 2011*

**engineering physihcs**

I need to create an Excel chart showing world oil reserves vs. time, which are both in columns and cannot find how to graph this in excel. thank you.

*February 12, 2011*

**chemistry**

2.36 L of an aqueous solution containing 39.0 g of KCl dissolved in pure water is prepared. The molarity of the solution is?

*February 8, 2011*

**gen chem 2**

In the chemical kinetics experiment, determine the dilution of the stock bleach solution. The bleach used will be around 5.5% (weight/volume). Convert this to molarity

*February 8, 2011*

**algebra**

5 1/3-3 5/6..make sure to change to common denominators

*February 7, 2011*

**math**

6 with 9 0's...6,000,000,000

*February 7, 2011*

**Chemistry**

how to figure The grams of protein in 1 cup of soup that has 98 {\rm Cal} with 6 {\rm g} of fat and 8 {\rm g} of carbohydrate

*February 7, 2011*

**Chemistry**

Which will evaporate faster, 50ml of 1.0m NaCl or 50ml of pure water?

*February 6, 2011*

**College Chemistry**

Consider a .0500m solution.HClO2such that36% of the molecules dissociated when dissolved in water. Calculate the vant Hoff factor for this solution is hclo2 is36% associated

*February 6, 2011*

**physics**

a 2.0kg block is pushed against a spring that has a force constant of 10 n/m. the spring is compressed 10 cm. when the block is released, it slides across a rough surface for 25 cm before it stops. find the coefficient of friction between the block and the surface.

*February 6, 2011*

**Algebra**

Flying against the wind, Lisa made the flight from Reno in 3 h with a steady airspeed of 400km/h. Returning later with a tail wind that had doubled in magnitude, she landed 225 km beyond the starting point in 3 h. What was the original wind speed? How far from Reno did she ...

*February 6, 2011*

**math**

I thought your answer was funny, anon. Brianna, do you know what bisect means? You need to look up that word if you don't.

*February 2, 2011*

**Algebra- is my answer right**

Simplify. (2b^-4 c^6)^5 I get b^20/32c^30 Is that right? Write your answer using only positive exponents.

*February 1, 2011*

**Algebra- is my answer right**

Thanks, I see what I did, I squared when adding to the right side

*February 1, 2011*

**Algebra- is my answer right**

Graph the Circle x^2+y^2+4x-2y-20=0 I get: (x^2+4x)+(y^2-2y)=20 (x^2+4x+4)+(y^2-2y+1)=20+16+4 (x+2)^+(y-1)^2=(40/2)^2 But I don't think its right can you help me with what I did wrong? Thanks

*February 1, 2011*

**Algebra- is my answer right**

I see what I did, Thanks

*February 1, 2011*

**Algebra- is my answer right**

Use the rational zeros theorem to list all possible rational zeros of the following. -2x^3-x^2-4x-5 I got +-1,+-5+-,5/2,+-1/2 Be sure that no value in your list appears more than once.

*February 1, 2011*

**Algebra**

logx1/64=-3 Solve for x

*February 1, 2011*

**Algebra**

The midpoint of (AB) is M = (1,3). One endpoint is A =(8,-2). Find the coordinates of the other endpoint B.

*January 28, 2011*

**Algebra**

Add: (2/3x^2-4x-1)+(1/3x^2-19x+28) Simplify as much as possible.

*January 28, 2011*

**Algebra**

I figured it out.

*January 28, 2011*

**Algebra**

Suppose that the functions q and r are defined as follows: q(x)=2x+1 r(x)=-2x^2+1 Find the following: (qOr)(4)= (rOq)(4)=

*January 28, 2011*

**5th grade math**

ok just subtract.first subtract the denominator the the numetator.ooo and ifyour teacher is picky like mine the reduce it

*January 27, 2011*

**algebra2**

48x3z5y - 36x3z3y4 + 48x2z5y The GCF of 48, 36, and 48 is 6; " x^3, x^3, x^2 is x^2; " z^5, z^3, z^5 is z^3; " y, y^4, and y is y (you figure it out because its the most they all have in common) 6x^2z^3y( ) Now take that out and see what's left. Post it if ...

*January 26, 2011*

**math**

No, Raluca, it's 3:2.

*January 26, 2011*

**math**

There are 15 boys. Out of 25 students, that means there are 10 girls. Reduce 15/10 for your answer.

*January 26, 2011*

**math**

What are the directions...?

*January 26, 2011*

**math**

Mick, take 14 objects (maybe pencils or paper clips) and try to split them in 2 equal groups. See if you're able to.

*January 26, 2011*

**analogies**

scripted? no idea..

*January 26, 2011*

**Algebra**

The polynomial function f is defined by f(x)x^4-3x^3-2x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth

*January 25, 2011*

**Math**

A loan of $37,000 is made at 3%interest, compounded annually. After how many years will the amount due reach $49,000 or more? (Use the calculator provided if necessary.) Write the answer as a whole number. ****I get 1.03^10 = 49,724.91 So is the answer 10 years at 49,725.00?

*January 24, 2011*

**Algebra**

I get 1.03^10 = 49,724.91 So is the answer 10 years at 49,725.00?

*January 24, 2011*

**Algebra**

A loan of $37,000 is made at 3%interest, compounded annually. After how many years will the amount due reach $49,000 or more? (Use the calculator provided if necessary.) Write the answer as a whole number.

*January 24, 2011*

**Math**

Multiply. (-1/5) X(-7)X(4/7) Write your answer as a fraction in simplest

*January 24, 2011*

**Math Please Help**

Thank You so much!

*January 24, 2011*

**Math Please Help**

I still can't get it, I will just hit the I don't know button because I'm stressing over it to much.

*January 24, 2011*

**Math Please Help**

The answer cannot be in a radical form

*January 24, 2011*