Sunday

January 22, 2017
Total # Posts: 905

**statistics**

A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second source. The sample mean is 99 and the standard deviation is 6. Conduct a ...

*May 22, 2010*

**chemistry**

15.0 g of Potassium metal is dropped into 50.0 ml of a 1.50 mol/L solution of H2SO4. what is the mass of gas given off during the reaction?

*May 12, 2010*

**chemistry**

thanks!

*May 12, 2010*

**chemistry**

okay so i got, 0.02375 molAl(OH)3x3molH2SO4/2molAl(OH)3=0.035625molH2SO4 0.035625molH2SO4x98.08g/molH2SO4= 3.4941g H2SO4 Correct? so the 3.4941g would be how much H2SO4 needed to neutralize the spill?

*May 12, 2010*

**chemistry**

so moles Al(OH)3 = M x L = 0.500 x 0.0475 = ?? is 0.02375?

*May 12, 2010*

**chemistry**

in the lab there is a spill of 47.5mL of .500 mol/L Al(OH)3. How many grams of H2SO4 would be needed to neutralize the spill.

*May 12, 2010*

**physics**

Air will break down as a dielectric when subjected to applied fields in excess of 3 * 10^6 N/C. a parallel plate capacitor using air as a dielectric has a capacitance of 1.0nF and a separation b/t plates of 1.0micrometer. how much energy U was stored in this capacitor at the ...

*April 25, 2010*

**chemistry**

How can u determine the molar mass of a compound?

*April 21, 2010*

**calculus high school**

never mind, the second term is derived using the product rule

*April 8, 2010*

**calculus high school**

isn't that the power rule? anyway, ow do you derive the second term?

*April 8, 2010*

**calculus high school**

thanks. you got the answer right. but i don't understand how the chain rule is used iin this problem.

*April 8, 2010*

**calculus high school**

7y^4+x^3y+x=4 using implicit differentation, how do i solve this problem. it is a textbook example but the partwhere i "use the chain rule on the first term" doesn't make sense to me because they get d/dx 7y^4+(x^3dy/dx +y d/dx x^3)+d/dx x

*April 8, 2010*

**literary**

what is the subordinating conjunction in this sentence..? I mentally outlined my essay while i waited for the bus.

*March 28, 2010*

**physics**

A sample of anthracite has a moisture content of 5% when mined and an energy density of 35 kJg-1 when completely dried. Assuming that during combustion, the temperature of the water in the un-dried coal is raised from 20.0oC to 100.oC, and then vaporized at 100.oC, estimate ...

*March 10, 2010*

**Business**

The four Ps of a marketing mix are:

*March 5, 2010*

**business law**

What do you feel about community corrections? Do you feel a community-based punishment is justifiable in today’s society? Explain why or why not. Provide an example of a community-based punishment. How do community corrections affect American society?

*February 21, 2010*

**200**

Most public schools are supported financially by district, state, and federal government agencies. Identify the roles each of these agencies has in your local schools. Which agency do you feel has the most significant influence over policy and curriculum decisions for local ...

*February 18, 2010*

**Trigonometry**

degrees

*February 17, 2010*

**calc**

Let f(x) = x2 + 3x + 2. Find the equation of the line containing (1, f(1)) and (3, f(3)).

*February 8, 2010*

**provine**

How does the tilt of the earth affect climate

*February 7, 2010*

**vocabulary**

The mom left the room with a MODICUM of respect after her baby began ____ . a) sleeping b) screaming c) praying d) singing b is that correct

*January 31, 2010*

**vocabulary**

scathe: to attack with severe criticis, to harm, injury.

*January 31, 2010*

**vocabulary**

After the play _____, several critics made scathing comments about it. a)succeeded b)opened c)closed d)bombed a is that correct

*January 31, 2010*

**vocabulary**

The mom left the room with a MODICUM of respect after her baby began ____ . a) sleeping b) screaming c) praying d) singing b is that correct

*January 31, 2010*

**algebra**

what did the ape think of the grape's house?

*January 18, 2010*

**science**

Post a 200- to 300-word response to the following: In your own words, summarize each of the major theories of biology. • Choose one theory and provide an example of how this theory relates to the news today. • Use at least one outside reference in addition to your ...

*January 15, 2010*

**math**

In 1979 women earned .63 to each $ earned by a man. 2003 women earned 80% of what men earned. Since 2003 women lost 0.8% in earnings If the current median income for a man is 40,688 what is the median income for a woman?

*December 22, 2009*

**physics**

Two rock climbers, Bill and Karen, use safety ropes of similar length. Karen's rope is more elastic, called a dynamic rope by climbers. Bill has a static rope, not recommended for safety purposes in pro climbing. Karen falls freely about 1.7 m and then the rope stops her ...

*December 12, 2009*

**Physics 221**

A constant horizontal force of magnitude 18.0 N pushes a block of mass 2.00 kg along a rough horizontal surface for a distance of 2.00 m. During this operation the speed of the block changed from 4.00 m/s to 6.00 m/s. What work was done on the block by kinetic friction? (a) 32...

*December 10, 2009*

**Physics 221**

A 20g particle is moving to the left at 30 m/s. How much net work must be done on the particle to cause it to move to the right at 30 m/s. The answer is 0J of work, and i understand the method of equations, but i don't understand the logic behind it. Thanks for any help.

*December 8, 2009*

**algebra**

Hosni gave the following argument that 2(a 1 b) 5 2a 1 2b, for all integers a and b. If the argument is correct, supply the missing reasons. If it is incorrect, explain why not

*November 22, 2009*

**AP BIO**

The answer is 3, I know that for sure

*November 22, 2009*

**Physic**

I hate this site

*November 7, 2009*

**statistics**

a mathematically defined curve that is the comparison distribution used n ANOVA is called the?

*November 7, 2009*

**calculus**

this is wrong

*October 26, 2009*

**physics**

The 49 kg climber is supported in the "chimney" by the friction forces exerted on his shoes and back. The climber has reduced push to verge of slip. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 1.2 and 0.8...

*October 26, 2009*

**algebra**

spuare root of 24 as radical expression.

*October 13, 2009*

**us history**

why is the study of early Americans so difficult?

*September 26, 2009*

**math**

The amount $180.00 is what percent greater than $135.00? A. 35% B. 33.33% C. 75% D. 133.33% it's d right

*May 28, 2009*

**math**

sorry i was pressing the wrong key now i got it .thank you

*May 28, 2009*

**math**

that was for the first respons i will read ms.sue's now

*May 28, 2009*

**math**

it didn't work

*May 28, 2009*

**math**

Your employer has 600 business cards printed for you, and you give away 280 of them. To the nearest hundredth, what percent of the cards is left? A. 18.75% B. 21.43% C. 46.67% D. 53.33% i tried this formual but i couldn't do it r= p/b

*May 28, 2009*

**math**

The product of 7/16, 4/3 and 1/2 is A. 2 13/48. B. 21/32. C. 7/24. D. 7/12. 7/16*4/3*1/2=28/96 can you explain to me the next step

*May 28, 2009*

**math**

i got the answer it's D thanks how did you figure out which operation to use.

*May 28, 2009*

**math**

If 28% of a sum is $100.80, what is the sum? A. $129.02 B. $277.78 C. $282.24 D. $360.00 how can i do this

*May 28, 2009*

**math**

how did u get the 1.06? 6% i move the % sign moved the decimal 2 place to left 0.06?

*May 28, 2009*

**math**

You purchase a shirt for $8.50. There is a 6% sales tax. Your total cost will be A. $8.55 B. $8.98 C. $9.01 D. $13.60 how can i solve this?

*May 28, 2009*

**math**

The LCD for the fractions 1/3, 3/4, 5/32, and 8/9 is A. 24. B. 64. C. 288. D. 3072. can u show me how to do this

*May 26, 2009*

**Algebra**

Thank you for answering, but I'm so confused. Can someone else help, please?

*April 27, 2009*

**Algebra**

I don't understand. If you do it that way, your z-3 doesn't cancel and then i don't know where to go from there.

*April 27, 2009*

**Algebra**

Wait, I wrote it wrong. This is the correct way: (9z-42z-72)/(3z^2+28z+32)divided by(z^2-9z+18)/(2z^2+10z-48)

*April 27, 2009*

**Algebra**

9z-42z-72/3z^2+28z+32divided by 2z^2+10z-48/z^2-9z+18 Can someone help me? I know they're supposed to be flipped and factored, and I did that, but afterwards I can only get as far as: 9z+12/3z+4*2z-6/z-3

*April 27, 2009*

**Criminal Justice**

Can someone help me find the average punishment for forcible rape in the United States? I know most of it is based on a state level, but I'm having a hard time finding any general information. I need to know the current punishment for rape. Please help :)

*April 22, 2009*

**Managerial Finance**

In general the larger the portion of the firm's sales that are on credit, what happens

*April 21, 2009*

**LOGIC - Strength of enumerative arguments**

#1 Here's my argument: Alice went to Lincoln High and earned a college scholarship. Ben went to Lincoln High and earned a college scholarhip. Carol went to Lincoln High and earned a college scholarship. Dan went to Lincoln High and earned a college scholarship. Ellen goes ...

*April 11, 2009*

**LOGIC - Strength of enumerative arguments**

#1 Here's my argument: Alice went to Lincoln High and earned a college scholarship. Ben went to Lincoln High and earned a college scholarhip. Carol went to Lincoln High and earned a college scholarship. Dan went to Lincoln High and earned a college scholarship. Ellen goes...

*April 10, 2009*

**12th grade**

Map of Wazir Akbar Khan district of Kabul – create a map with three-dimensional aspects that includes (but not limited to) Amir’s home, Ali’s quarters, Ghargha Lake, the cemetery (pomegranate tree), bazaar, Cinema Zainab, Kabul River, bus station, kite maker&#...

*February 20, 2009*

**opinion sociology**

#1. 1 #2. 3 #3. 1 #4. 4 #5. 3

*February 6, 2009*

**12th grade**

List 3 problems of Decentralized power that existed under the Articles of Confederation. For each problem, identify one solution that the Constitution provided to address the problem.

*February 5, 2009*

**Algebra**

This one too please, 2/5x-1/3x=3

*January 26, 2009*

**Algebra**

Help, how do I do these? 1. 8y+4(2+y)=3(y-4)+10y 2. Square root symbol 81 -|-8+17|+3 the sqaure root symbol doesn't hang over the entire equation, just the 81. thanks

*January 26, 2009*

**Physics**

to give destructive interference, you must have path difference, x- y = (2n + 1) * lamda/2 where n = (0, 1, 2, ....)

*January 25, 2009*

**history**

i have the supreme court..

*January 24, 2009*

**history**

Can anyone help me ?? George W. Bush's victory in presidentaial election of 2000 was finally decided by who??

*January 24, 2009*

**geometry**

#2 T,U,X,Y

*December 31, 2008*

**biology**

question 2 : the elodea gives off oxygen which lets the BTB stay blue

*December 17, 2008*

**AP Statistics**

If you know that a randomly chosen person 25 years of age or older is a college graduate, what is the probability that he/she is in the force labor? Show your work. Given for college graduates: total pop = 51,582 in labor force = 40,390 employed = 39, 293 I tried using the ...

*December 17, 2008*

**AP Stats**

If you know that a randomly chosen person 25 years of age or older is a college graduate, what is the probability that he/she is in the force labor? Show your work. Given for college graduates: total pop = 51,582 in labor force = 40,390 employed = 39, 293 I tried using the ...

*December 17, 2008*

**8th grade**

what does "new moon" have to do with the book new moon

*December 11, 2008*

**english**

Which of the following sentences has a helping verb? A. She had rested on the dock. B. He went home late. C. Her brother paddled the canoe. D. She swam across the lake.

*December 10, 2008*

**government**

Whose responsibility is it to determine if governmental acts are constitutional?

*November 13, 2008*

**math**

an 8oz cup of water contains 7.5 x 10^24 water molecules. the ocean contains 5.4 x 10^46 water molecules. about how many cups of water are in the ocean.

*October 16, 2008*

**physics**

A projectile is launched with a speed of 41 m/s at an angle of 60° above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight. m

*October 9, 2008*

**biology**

which characteristic makes birds diffrent from all ather vertebrates?a.they can fly or b.their feathers. b right

*August 16, 2008*

**biology**

eye color is not an example of a trait.false

*August 16, 2008*

**biology**

bacteria is a form of prokaryotic cells,cells that have no nucleus . true right

*August 16, 2008*

**earth science**

where do most earthquakes take place? the equator,near oceans,everywhere,a fault line. #4 right

*August 16, 2008*

**earth science**

oceanography is one of the oldest sciences. false right

*August 16, 2008*

**geometry**

find the area of triangle if the sides measure b=12in ;h=18in. 108 right

*August 16, 2008*

**geometry**

find the area of a rectangle if it measures L=9 in and W=7.my answer is 63 in.

*August 16, 2008*

**geometry**

find the area of a square if each side measures 10 cm. my answer is 100 cm

*August 16, 2008*

**English**

(1) We decided to climb Mt. Rainer, but it was a long, hard journey to Washington State from Medford, Oregon. (2) We were worried about our likely sucess in the cold enviroment of the upper slopes. (3) For one thing, Marty was broke and anxius about having warm clothes for ...

*July 10, 2008*

**Physics**

Two adjacent corners of a square have charges q1 = +1.5 x 10-9 C and q2 = +4.0 x 10-9 C. The length of a side of the square L = 0.25 m. Find the EPE of a charge q3= -6.0 x 10-9 C placed at the 2 remaining corners.

*July 10, 2008*

**english**

how about these two Crocodiles,quiet as logs,lurked on the riverbanks. Large and small dinosaure,stalked the grassy plains.

*July 9, 2008*

**english**

Detective Homer Fry and jenine Small looked high and low for clues. Cory drove to middleton in his search for Eloise. Dose one of these sentence have simple subject also be its complete subject.

*July 9, 2008*

**English**

i still didn't get it is the subject you or the shoe shop. even the other one i didn't get it

*July 8, 2008*

**English**

in which sentence dose the subject comes after the verb? A.On the next street,you'll find the shoe shop. B.Where is my Elvis CD?

*July 8, 2008*

**physics**

kjkjn

*July 7, 2008*

**205**

1 b 2 c 3 c 4 c 5 b 6 c 7 c 8 c 9 a 10 c 11 b 12 c

*May 8, 2008*

**DUE AT MIDNIGHT: HELP ME!!**

The only thing that is SUPPOSED to be in your urine is about 95% water, and 5% dissolved salts, organic wastes and hormones. if you have protein in your urine, you have a problem!

*May 7, 2008*

**english**

if not where should i make changes

*May 7, 2008*

**english**

i need to know if my paper is in order and is grammatically correct. Symbolism, 1the use of symbols to invest things with a representative meaning or to represent something abstract by something concrete, is used in novels and stories by authors worldwide. Why do authors ...

*May 7, 2008*

**math**

noooooooooooooooooooooooooooooooooo

*April 24, 2008*

**SCI**

Jacque earns $7.20 per hour (h). For overtime (each hour over 40 hour) he earns $10.80 per hour. If he works 54.5 hour in a week, what pay should he receive?

*April 21, 2008*