Sunday

December 21, 2014

December 21, 2014

Total # Posts: 495

**Physics**

You hang mass m=0.22 kg on a spring with constant 12 N/m. You pull the mass down a distance of 0.04 m from its equilibrium position and release it. You measure the period to be 0.85 s. If you instead pull the mass down 0.12 m from its equilibrium position and release it, what ...
*January 24, 2013*

**math**

a flagpole casts a shadow 10 ft. long if a man 6 ft. tall casts a shadow 4 ft. long at the same time of day, how tall is the flagpole.
*January 21, 2013*

**CHEMISTRY**

Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters
*January 12, 2013*

**chemistry**

The solubility of bismuth iodide (BiI3) in water is 9.491 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)
*January 12, 2013*

**MATH I HAVE ASKED TWICE ALREADY!!!!!!!!!**

There will be more than one answer. To have a remainder of 8, the divisor must be greater than 8. The only single digit greater than 8 is 9, so 9 must be the divisor. Since 8 is 1 less than 9, the dividend needs to be one less than a multiple of 9. Candidates are values of 3 ...
*January 6, 2013*

**English**

Scotland
*January 6, 2013*

**Math**

Um so what's the answer, 35 or 12??
*December 26, 2012*

**English - Ms. Sue help**

I just took this and it is actullly, 1.b 2.c 3.b 4.c not even kidding....Promise!
*December 19, 2012*

**Statistics**

Is is possible for the regression equation to have none of the actual (observed) data points located on the regression line?
*December 2, 2012*

**Statistics**

If a research report contains the results of an independent measures ANOVA as follows: F(3,28) = 5.36, p<.01 the study only compared two groups rather than three correct?
*December 2, 2012*

**math**

"the area of the region under the graph" is an integral of f(x) from a to b, in your case from 4 to 10. ∫ f(x) from 4 to 10=∫ (10x-5)dx from 4 to 10. you just have to compute the integral and that will give you: 1/2*10x^2-5x evaluate it from 4 to 10 I ...
*November 30, 2012*

**Math**

Do you have any information about length of the sides maybe? By the way you do have information about at least one angle and it's 90 degrees (because triangle is a right one)
*November 30, 2012*

**Math**

I posted the answer under your previous question.
*November 29, 2012*

**Math**

The formula is y-y1= m*(x-x1) 1. Find the midpoint= [(x1-x2)/2, (y1-y2)/2] you will get (-4,-2) 2. Find slope m1= [2-(-6)]/[-7-(-1)]= 8/-6=-4/3 3. find the slope of the perpendicular line m1*m2=-1 -4/3*m2= -1 m2= 3/4 4. Plug in given points (-7,2) and (-1,-6) and m2 in the ...
*November 29, 2012*

**math**

Did you provide the all information? Because all you can do with the given information is to plug P=4 into the equation and find x, but x is quantity of CD demanded. Consumer surplus is the difference between the max price a consumer willing to pay and the actual price they do...
*November 28, 2012*

**Math**

2.4*7.5+6*1=24
*November 28, 2012*

**math**

You start with 4 matches, then you add only three more to get another (attached to the fist one) square. Then each time to get one more square you add 3 more matches. Now, let x be a number of squares you can make from a given number of matches. Then 4+3*(x-1)=100. I used (x-1...
*November 28, 2012*

**math**

You should first convert 1.4t into kg. Then from that number subscribe empty trailer's mass and you will get the answer
*November 28, 2012*

**math**

Divide distance 4 1/2 by 1 1/2 you will get 3 (miles per hour). Please check exact math using the calculator but I believe it is right
*November 27, 2012*

**math pls help Ms Sue**

Sorry for misspells! Getting late!
*November 27, 2012*

**math pls help Ms Sue**

I am not sure with one, m or n, is an input and which one is output. But I believe the following rule can work: To get n: 15-3, 10-2, 5-1, 0-0 . As you can see each time the number (3,2,1,0) that you have to subscribe to get n is getting smaller by one. (if m is an input, but ...
*November 27, 2012*

**math**

I posted the answer in your latest question
*November 27, 2012*

**Math**

I think margin of error is 0.08, because if 0.5-0.08=0.42 (or 42%) and 0.5-0.08=.58 (or 58%) so 0.08 works perfectly
*November 27, 2012*

**math**

I believe first you need to add them 38+26=64, and then 10+54=64
*November 27, 2012*

**Calculus**

1/6(8+t)^6+constant
*November 27, 2012*

**7th grade math**

2A. 329.00*15%= 329.00*0.15=$49.35 this is the discount. 329 - discount = 329 -49.35=$279.65 discounted price 2B. 329*10%=329*0.1=32.9 is how much more the ipad will cost compared to the old price (increase in price). Now add it to the old price: 329 + 32.9=$361.9 is new price...
*November 27, 2012*

**7th grade math**

1A. 12.99*5%=12.99*.05=0.65 this is the sale tax 12.99 + 0.65= 13.64 is the price after tax 1B. 12.99*20%=12.99*0.2=$2.6 is discount 12.99 - discount= 12.99 - 2.6=10.39 is the price after discount was applied 10.39*5%=10.4*0.05=0.52 is the tax 10.39+.52=$10.91 is the price ...
*November 27, 2012*

**physics**

A 66.0 kg rider sitting on a 7.1 kg bike is riding along at 9.4 m/s in the positive direction. The rider drags a foot on the ground and slows down to 6.5 m/s still in the positive direction. What is the change in momentum of the rider and bike?
*November 26, 2012*

**Algebra 2**

Te arch of the Sydeny Harbor Bridge can be modeled by y= -0.00211x^2 + 1.06x where x is the distance (in meters) from the left pylons and y is the height (in meters) of the arch above the water. For what distances x is the arch above the road? (It has a picture and in it the ...
*November 24, 2012*

**counting up method**

how do you do the counting up method
*November 19, 2012*

**AP Global **

Please, help! How did Islam unite and effectively rule diverse people and cultures?
*November 18, 2012*

**English - Ms. Sue help**

I just need an answer to No. 9 on the CCA Lang. Art test: "Rewrite the first stanza of "Scott's Goodbye" ,as free verse. I don't really understand "stanza", and "free verse"?
*November 13, 2012*

**Science**

Thanks a bunch!
*November 12, 2012*

**Science**

I have been thinking of something to do for my schools science fair for weeks and my teacher keeps telling me that i can't do my idea because its too easy for an honors student. I'm all out of ideas and I need help! Please!
*November 12, 2012*

**math**

what is the reciprocal of 3 5/7
*November 10, 2012*

**English**

Logos
*November 8, 2012*

**Algebra 2**

What's the solution?
*November 7, 2012*

**Algebra 2**

D-R=1550+42t-15t=1550=27t
*November 7, 2012*

**algebra 2**

Previos: D(t)=1550+42t-15t=1550=27t (t represtentnig time) Based on the function for D, what would be the total amount of non functional components in 2014? Let 1993 be represented by 0.
*November 6, 2012*

**world history**

Constitutional Monarchy :)
*November 6, 2012*

**English HELP!!!!!**

I have to find a antonym for atmosphere. Help please!!!
*October 17, 2012*

**physics**

A frictionless30degrees incline should provide an acceleration of 4.90m/s2 down the incline. A student with a stopwatch finds that an object, starting from rest, slides down a 15m very smooth incline in exactly 3s. Is the incline frictionless?
*October 9, 2012*

**Math**

looked it up helped allot! (:c)
*October 5, 2012*

**computers**

Although label choices vary for different printers, your textbook recommends __________ for laser and ink jet printers. A. Avery standard, 5160, Address B. Avery standard, 6150, Label C. Avery standard, 6150, Address D. Avery standard, 5160, Label I've looked through the ...
*June 27, 2012*

**Derivatives?**

Given that f(-0.5)=2 and f'(-0.5)=4, use a tangent line approximation to estimate f(0). The lesson is not very clear on what a tangent line approximaton is.
*June 5, 2012*

**algebra **

suppose 25 bacteria settle into a cut on.your arem and begin to double.every thirty minutes. creste s table where x is the number of minutes and y is the number of bacteria
*June 5, 2012*

**Math**

I believe you would add the four months together and divide by 4 to get your average. With rounding, I got $4,850.
*May 27, 2012*

**Cost Accounting**

Budgeted material costs 1,000 Budgeted labor costs 2,000 Budgeted overhead costs 1,500 Actual material costs 900 Actual labor costs 1,800 Actual overhead costs 1,250 1/1 WIP = 0 12/31 WIP = 2 1) Materials 25 Labor 20 2) Materials 15 Labor 32 Compute the overhead allocation ...
*May 27, 2012*

**physics**

Thank you Elena! :)
*May 25, 2012*

**physics**

Adam?...Elena thanks for the answer, but it says its wrong.
*May 25, 2012*

**physics**

A highway curve has a radius of 123 m. At what angle should the road be banked so that a car traveling at 26.5 m/s has no tendency to skid sideways on the road? [Hint: No tendency to skid means the frictional force is zero.] I can't get this one right either please someone...
*May 25, 2012*

**physics**

A car drives around a curve with radius 390 m at a speed of 32 m/s. The road is not banked. The mass of the car is 1200 kg. (a) What is the frictional force on the car? N c) Explain I really don't know how to solve this could someone please help me out on this. Thank you.
*May 25, 2012*

**Math**

6/20 7/20 8/20 9/20 10/20 1/2 11/20 12/20
*May 14, 2012*

**caculus**

1+1
*May 1, 2012*

**physics**

A person walks 1 mile every day for exercise leaving her front porch at 9:00 am and returning to her porch at 9:25 am what's the total displacement of her daily walk?
*April 23, 2012*

**physics**

A person walks 1 mile every day for exercise leaving her front porch at 9:00 am and returning to her porch at 9:25 am what's the total displacement of her daily walk?
*April 23, 2012*

**math**

oooooooohhhhhh so it's bigger than before!!!
*April 19, 2012*

**math**

when a cross tile is placed on a number plane the centre number is the average of al the numbers covered. Explain why
*April 16, 2012*

**Physics**

A cylindrical 7.00-kg reel with a radius of 0.60 m and a frictionless axle, starts from rest and speeds up uniformly as a 3.00-kg bucket falls into a well, making a light rope unwind from the reel (Fig. P8.36). The bucket starts from rest and falls for 5.00s. (a) What is the ...
*April 11, 2012*

**Chemistry**

If you have 250 mL of 2 M of sodium sulfate diluted to make 0.500 M of sodium sulfate, how would you figure out the volume?
*April 10, 2012*

**Physics**

A dog, with a mass of 8.0 kg, is standing on a flatboat so that he is 26.8 m from the shore. He walks 8.6 m on the boat toward the shore and then stops. The boat has a mass of 36.0 kg. Assuming there is no friction between the boat and the water, how far is the dog from the ...
*March 27, 2012*

**physics**

Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.470 m to y = 1.47 m. The second stick lies along the x axis from x = 0.320 m to x = 1.32 m. The third stick is positioned so that one end is on the x axis at x = 0....
*March 26, 2012*

**Math**

how do you make this into an equation? whats the x and y intercept? She has two jobs, at her first job she makes $10 per hour, at her second job she makes $12 per hour. last week she made $440.
*March 22, 2012*

**Algebra**

how do you make this into an equation? whats the x and y intercept? She has two jobs, at her first job she makes $10 per hour, at her second job she makes $12 per hour. last week she made $440.
*March 22, 2012*

**Geometry**

The answer is 413 km.
*March 19, 2012*

**Physics**

If the scuba diver is looking from the water n=1.33 and the other man is above water so n=1, use the equation n1sin(theta)=n2sin(theta). 1.33sin(20)=1sin(theta) 27.06 degrees is the answer, but since it says from the horizontal do 90-27.06
*March 17, 2012*

**Science**

PLEASE HELP ME!!!!! Which requires more energy? Heating up a 350 mL cup of coffee from 25C to 65C? or Warming the surface of a Lake (2,000,000,000 mL) from 28C to 29C. and Prove your answer.
*March 7, 2012*

**physical**

Thank you for your help!!!
*February 12, 2012*

**physical**

Consider a pulse of laser light aimed at the moon that bounces back to earth. The distance between Earth and Moon is 3.8 x 10 (small eight above) m. Show that the round-trip time for the light is 2.5 s.
*February 12, 2012*

**physics**

A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
*February 8, 2012*

**math**

L = 2w W = w A=Lxw 200= (2w) (w) 200 = 2w^2 200 = 2w^2 200 divided by 2 = w^2 100 = w^2 square root of 100 = w w= 10 Therefore the length is 20 and the width is 10.
*January 29, 2012*

**chemistry**

4 you dont count the end ones unless there is a decimal point
*January 26, 2012*

**chemistry**

solar flares containing hot gases can rise to 120000 miles above the surface of the sun. What is the distance in kilometers? how do i set this up??
*January 26, 2012*

**anatomy**

the nervous system is comprised of what two tissue types??
*January 25, 2012*

**anatomy**

the nervous system is comprised of what 2 Tissue types?
*January 24, 2012*

**Pre-Calc-Please check**

Is this correct? Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3 - 3x^2 + 5x+6 Possible roots are p/a = -+1, -+2, +-3, -+6. -+3/2
*January 10, 2012*

**Pre-Calc-Please check**

Number three should read p/q = not p/a Thank you for letting me know the first two are correct
*January 9, 2012*

**Pre-Calc-Please check**

I have three questions: 1. What is the remainder of (x^3 + 2x^2 - 5x+4) /(x-3) I think the answer is 34?? 2. Evaluate (4+5i)(2+2i) =4(2) +4(2i) + 5i(2) + 5i(2i) = 8 + 8i + 10i+10i^2(-1) =-2 + 18i 3. Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3...
*January 9, 2012*

**catering**

1. You're likely to encounter formal service in all of the following settings except which one? A. A gourmet restaurant B. A wedding C. A church outing D. A dinner party
*January 3, 2012*

**Social Studies**

Hi,My social studies test is coming and the review asks about the counter reformation in the age of exploration. But my Scott Foresman text doesn't say anything about the counter reformation. Where can I find out about it?
*December 11, 2011*

**Algebra II**

A projectile is launched from a platform 10 meters above ground with an initial upward velocity of 20 meters per second. Find the time when the projectile has returned to the initial height launch, find the time the projectile hits the ground, find the time when the projectile...
*December 8, 2011*

**Algebra II**

Thank you
*December 5, 2011*

**Algebra II-Reiny please recheck**

No the way I typed is is the way it is written-- 5 on top, sigma symbol in middle and k=2 on bottom with the equation (k^2-5k+2) to the right and the answers are possible: 4, -4, 2, -2 I'm not sure if I see (4) used above when you substituuted-is that the one not generated??
*December 5, 2011*

**Algebra II**

the 5 should be on top then the signma symbol in middle and the k=2 on the bottom with the equation (k^2 -5k+2) to the right of all of it
*December 5, 2011*

**Algebra II**

I solved one of these sigma notations and had Reiny check it in an earlier post but this one totally befuddles me- Which of the following terms would not be in the series generated by the expression: 5 Signma symbol (k^2-5k+2) k=2 the choices are 2, -2, 4 or -4If you could ...
*December 5, 2011*

**Algebra II**

Please help-I need to write 4+6+8+10 in sigma notation would it be sigma sign in middle (3) on top of sign, n=0 on bottom of signma notation and to the right it would be (4+2n) so it would look like-- (3) (sigma in middle) (4+2n) n=0
*December 5, 2011*

**ordered fields**

prove (3x^2 + 4x-1)/(7x^5+5)>0 is field. can you just prove one of the addition axioms?
*November 30, 2011*

**Chemistry**

I got error also
*November 30, 2011*

**Chemistry**

I'm stuck there too Ryan
*November 30, 2011*

**Chemistry**

A solution is prepared by dissolving NH3(g) in water according to the following equation. NH3(g) + H2O(l)=NH4^+(aq)+ OH^-(aq) If the pH= 9.60 what is the [OH-] in the solution.
*November 30, 2011*

**Chemistry**

q= 20.00 C =125.0g x 98.0 C x 25.80 C -20.00??
*November 30, 2011*

**Chemistry**

still dont get it
*November 30, 2011*

**Chemistry**

a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by putting it into a beaker of hot water. The ...
*November 30, 2011*

**geometry**

They made a perfect pear
*November 16, 2011*

**Chemistry**

IS THIS RIGHT? Experiments were performed with four metals and solutions of their ions: A-A^+, B-B^2+, C-C^2+, D-D^2+. The results of the experiments were: D^+2 + C ---> No reaction B^+2 + C---> B + C^+2 A^+ + B ---> A + B^+2 a.) Write the equation for each reduction ...
*November 7, 2011*

**math**

i am having trouble with two digit dividends. here is an example 34 divided 264
*November 1, 2011*

**Physics**

A rock is projected from the edge of the top of a building with an initial velocity of 19.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 77 m from the base of the building. The acceleration of gravity is 9.8 m/s^2.(...
*November 1, 2011*

**physics**

A rock is projected from the edge of the top of a building with an initial velocity of 19.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 77 m from the base of the building. The acceleration of gravity is 9.8 m/s^2.(...
*November 1, 2011*

**physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both boats reach the edge of a 4.8 m waterfall. The spy's speed is 16 m/s and the officials; speed is 26 m/s. ...
*November 1, 2011*

**english**

rewrite these sentences into reported speech. 1-where did you get these dress? 2-who did these dress belong to? 3-where do you buy your clothes? 4-how long have you been collecting these clothes? 5-what will you wear at the party? 6-why are you decorating the house? 7-what ...
*October 25, 2011*

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