Friday

March 6, 2015

March 6, 2015

Total # Posts: 78,616

**Physics**

a 15000 kg airplane descends a vertical distance of 10.0 km over a horizontal distance of 80.0 km. What is the airplane's loss of potential energy. (I'm confused about the height) Ep=mgh m= 15000 kg g= 9.81 m/s^2 h=??
*December 27, 2014*

**Biology**

That's why I'm confused. I'm asked about where it ends, and it is not exactly an open-ended question.
*December 27, 2014*

**Biology**

Where does the carbon cycle end? My project asks this, but I can of no specific "ending."
*December 27, 2014*

**Biology**

How does oxygen move in a food chain? When one organism eats another, does the oxygen move from the tissues of the prey to the predator, or is it something different?
*December 27, 2014*

**English**

What does the idiom to be "a little on the short side" mean?
*December 27, 2014*

**math**

i thought of it like this: 36 divided by 4 is 9, so if i divided 24 by 9, i might get the answer. but i wasn't sure, so i asked.
*December 26, 2014*

**math**

a muffin recipe calls for 4 cups of sugar and yields 36 muffins. if amelia only wants to make 24 muffins, how much sugar will she need?
*December 26, 2014*

**math**

thanks!
*December 26, 2014*

**math**

the bookstore normally sells mechanical pencils for $6.50. this week the pencils are discounted by 25%. to the nearest cent, what is the amount of the discount?
*December 26, 2014*

**Algebra**

well no problem!
*December 26, 2014*

**Algebra**

I could not have gotten this without your help. I kept getting 5040.
*December 26, 2014*

**Algebra**

10C6 = 10! / (6! * 4!) = 10 * 9 * 8 * 7 / 4! = 5040/24 = 210 hope this helps
*December 26, 2014*

**Algebra **

What is the value of 10C6? (How go get it?)
*December 26, 2014*

**engineering mechanics**

A block P weighing 200KN rests on the top of the block Q of weight 300KN and they are connected by a common string passing around a frictionless pulley S which is tied to a vertical wall by a horizontal string as shown if the coefficient of friction between the rubbing ...
*December 26, 2014*

**physics**

A golfer takes two putts to sink his ball in the hole once he is on the green. The ﬁrst putt displaces the ball 8.70 m east, and the second putt displaces it 6.04 m south. What displacement would put the ball in the hole in one putt? Answer in units of m and.......... ...
*December 25, 2014*

**French**

Which sentence is correct? Les chiens de filles sont gentils. Les chiens des filles sont gentils.
*December 25, 2014*

**English - Animal Farm**

The apples and milk.
*December 24, 2014*

**English - Animal Farm**

What negative traits are visible in the pigs after the rebellion in Chapters 1-3? I have read the chapters, but I can only come up with one example.
*December 24, 2014*

**Language arts**

What's your answer for this question?
*December 24, 2014*

**math**

Tom has $10 that he wants to use to buy pens and pencils. However, he does not want to buy more pens than pencils. A pen costs $3, and a pencil costs $1. Which graph represents this scenario? (Here, x represents the number of pens and y the number of pencils.)
*December 24, 2014*

**English**

Identify the sound device Shakespeare uses in this passage: HAMLET. Whose spirit with divine ambition puffed Makes mouths at the invisible event, —Hamlet, act 4, scene 4 I think it is D assonance alliteration onomatopoeia meter
*December 24, 2014*

**algebra**

. The function g(t) = 2t represents the number of guitar lessons, g(t), you can complete in t months. How many guitar lessons can you complete in 7 months? Provide your conclusion as a complete sentence. t is months, and there's 7 months given so plug that to t in the ...
*December 23, 2014*

**Chemistry**

balloon has a volume of 6.6 liters at 25.0 C. The balloon is then heated to a temperature of 92.7 C. The volume of the balloon after heating will be liters
*December 22, 2014*

**Chemistry**

what mass of sodium sulphate is produced If 49g of hydrogen sulphate reacts with 80g of Nitrogen dioxid ?
*December 22, 2014*

**PHYSICS**

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/3 revolution per second. Assuming a minimum coefficient of friction of 0.70 between clothing and wall, what diameter ...
*December 22, 2014*

**physics**

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/3 revolution per second. Assuming a minimum coefficient of friction of 0.70 between clothing and wall, what diameter ...
*December 22, 2014*

**math**

A store offers 25% off merchandise that is already discounted by 30%. Is this the same as a 55 % discount off the original price? Write an example to illustrate your reasoning. Can someone please help me?
*December 22, 2014*

**Isaac**

I think it is not really full of stakes, therefore it is overstatement.
*December 22, 2014*

**Isaac**

“I was so anxious to see it kept entire, lest the goats should break through, that I never left off till, with infinite labour, I had stuck the outside of the hedge…full of stakes…” —Robinson Crusoe by Daniel Defoe I think it is C Understatement ...
*December 22, 2014*

**English**

I would think it would be A
*December 22, 2014*

**English**

What is the purpose of hierarchical structure in a media message? Hierarchical structure helps the reader weed out unimportant information. Hierarchical structure helps the author organize his or her writing. Hierarchical structure helps the reader determine the relationship ...
*December 22, 2014*

**math**

or greatest to least
*December 22, 2014*

**math**

what is an easier way to make decimal and fractions in least to greatest order. can u give me an example and thank u
*December 22, 2014*

**Math/Algebra 1**

You are welcome :)
*December 22, 2014*

**bbu**

Using all the following terms to establish balance sheet and income statement Owner equity =60,000 Net profit =? Account receivable =95,000 retained earnings =10,000 gross profit =? Interes expense =2,500
*December 22, 2014*

**chemistry**

how many moles of cao are needed to react with excess water to produce 370 grams of calcium hydroxide
*December 22, 2014*

**French**

Is "Elles sont belles" or "Elles sont belle" correct? I think it is the former.
*December 21, 2014*

**Integration**

a cattle trough has a trapezoidal cross section with a height of 1 m and horizontal sides of width 1/2 m and 1 m assume the length of the trough is 10 m. A. how much work is required to pump out the water in the trough? B. if the length is doubled does the amount of work ...
*December 21, 2014*

**Art**

What does the family look like it is celebrating in Le Traditionnel Gâteau des Rois by Edmond-Joseph Massicotte? It looks like Thanksgiving to me.
*December 21, 2014*

**AP CALC**

Find the POSITIVE value of x that satisfies the mean value theorem for f(x)=sin(x) on the closed interval [-3pi/2, 3pi/2]. please help I have no idea how to solve this problem
*December 21, 2014*

**ap calc**

if f(X)= 2X-X^2,if x<1 2x^2-4x+3, if >or equal to 1 find two values of c in the interval [0,2] that satisfy the mean value theorem. Please help I have no idea how to solve
*December 21, 2014*

**ap calc**

If f(x)=e^x, g(x)=sin(x), and h(x)=f(g(x)), then h'(pi/2)=? Please help I have no idea how to solve
*December 21, 2014*

**statistics**

interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of . The psychologist randomly selects children from this group and finds that their mean IQ score is . Based on this sample, find a confidence ...
*December 21, 2014*

**finance**

which of the following investments paid the highest rate of return? (a) a corporate bond that paid $72 per year in interest and that cost $600 to purchase (b) a money market fund that paid 8 percent interest (c) a corporate stock that cost $40 to buy and that paid dividends of...
*December 21, 2014*

**economics**

A bond yields $100 yearly at 4 percent interest. What is the market value? I got $1,500.
*December 21, 2014*

**ap calc**

For the curve f(x)=xln(x)+ (1-x)ln(1-x), find the value of x in the interval 0<x<1 where f(x) has a minimum. Please help I have no idea how to solve.
*December 21, 2014*

**ap calc**

Find the value of c which satisfies Mean Value Theorem for the function f(x)=sin(x) on the closed interval (-3ð/2,3ð/2).
*December 21, 2014*

**Nothing Realted **

I know this question should not be here but my samsung galaxy s5 is not working. The screen will come but i can not do anything. Technically it is frozen. I have tried every method. I tried to take the battery out. It did not work. I also tried to reboot it but the options ...
*December 21, 2014*

**Math**

An experimental solid disc flywheel has a 300m diameter and a mass of 70kg. Experiments show that, at all speeds of rotation, the frictional resistance to motion is equivalent to a torque of 0.15Nm. if when the flywheel is rotating at 50 rev/min, the driving power is removed, ...
*December 21, 2014*

**biology**

What role does the lilac flower play in its natural ecosystem? What is its niche in the food web
*December 20, 2014*

**ap calc **

Find the value of c which satisfies Rolle's Theorem for the function f(x)=sin(x^2)on (0, ãpi).
*December 19, 2014*

**English**

But what are some characteristics of a revolutionary song?
*December 19, 2014*

**English**

How do I write a revolutionary song?
*December 19, 2014*

**Biology**

In an ecosystem, when energy is given off as heat, does it change forms from chemical substances to heat? Or is it something different?
*December 19, 2014*

**Language arts**

What is it?
*December 19, 2014*

**Math**

For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation. X Y 4 6 8 12 10 15
*December 19, 2014*

**Geometry I**

Thanks much
*December 19, 2014*

**Geometry I**

What is the measure of 1? • 47o • 37o • 74o • 53o
*December 19, 2014*

**Math**

0.5?
*December 19, 2014*

**Math**

Is the sequence arithmetic? 15, 14.5, 14, 13.5, 13,....If so, give the common difference.
*December 19, 2014*

**Math**

The ordered pairs (0,-3), (1,2), (2,7), (3,12) represent a function. What is a rule that represents this function?
*December 19, 2014*

**S.S**

yes
*December 19, 2014*

**S.S**

What prohibited trade with another country? A. Embargo Act*** B. Smuggling C. Impressment D. neutral rights Is it A?
*December 19, 2014*

**statistics**

Write a correct alternative hypothesis for the claim that the average professional basketball player is at least 6’ 9” tall.
*December 19, 2014*

**Physics AIPMT**

H=gt²/2 16H/25 =g(t-1)²/2 16gt²/2•25 = g(t²-2t+1)/2 16t²=25t²- 50t +25 9 t²-50t +25=0 t= (50±sqrt(2500-4•9•25))/18=(50±40)/18 t₁=5 s, t₂=0.55s ( extraneous root since is less than 1 second) H= gt²...
*December 19, 2014*

**Algebra**

The heigh h, in meters, that Andreina is above the water t seconds after beginning her dive is given by the formula h = -5t^2 + 6t + 10. After how many seconds will Andreina hit the water, rounded to the nearest tenth of a second?
*December 19, 2014*

**Algebra**

When Neil was 2 miles upstream from camp on a canoe trip, he passed a log floating downstream with the current. He paddled upstream for 1 more hour and then returned to camp just as the log arrived. What was the rate of the current?
*December 19, 2014*

**Math**

Use differential, (i.e. linear approximation), to approximate cube root of 64.1 as follows: Let f(x) = cube root of x. The linear approximation to f(x) at x = 64 can be written in the form y = mx+b. Compute m and b and find cube root of 64.2 via linear approximation
*December 19, 2014*

**Math**

Use differential, (i.e. linear approximation), to approximate cube root of 64.1 as follows: Let f(x) = cube root of x. The linear approximation to f(x) at x = 64 can be written in the form y = mx+b. Compute m and b and find cube root of 64.2 via linear approximation
*December 19, 2014*

**calculus**

The circumference of a sphere was measured to be 89.000 cm with a possible error of 0.50000 cm. A. Use linear approximation to estimate the maximum error in the calculated surface area. B. Estimate the relative error in the calculated surface area.
*December 19, 2014*

**Algebra math**

The height H and beat of a ball after T seconds is given by H equals 80t team take away 16x2. how long did it take for the bout to hit the ground
*December 18, 2014*

**math**

w=80rmp r=2ft what is v=ft/min
*December 18, 2014*

**math**

There are 27,878,400 square feet in one square mile. How many square feet are there in 35 square miles? Estimate by rounding the number of square feet in one square mile to the nearest ten million and the number of square miles to the nearest ten. Also find the exact answer
*December 18, 2014*

**Math**

What is a real world problem that compares the ratios 5 to 9 and 12 to 15.
*December 18, 2014*

**statistics**

An IQ test was administered to a random sample of 26 mental patients and the mean was found to be 99.7. For this test, the population values are known to be normally distributed and with a population standard deviation of 15. Construct a 90% confidence interval for the mean IQ...
*December 18, 2014*

**Math**

Lindsay bought six cds at the mall: the original price was $13 each but she got a discount, and only paid a total of $58.50 for all six. what was the discount
*December 18, 2014*

**english**

thanks
*December 18, 2014*

**english**

307 (Ps sorry for labeling this as the wrong subject)
*December 18, 2014*

**english**

Peter attends 6 dance lessons each week, all year long. There are 52 weeks in a year. Peter missed 5 dance lessons while sick. How many dance lessons did Peter attend during the year?
*December 18, 2014*

**physics**

If you use a horizontal force of 30.0 N to slide a 12.0 kg wooden crate across a floor at a constant velocity, calculate the acceleration.
*December 18, 2014*

**Math help**

A boy has 380 prize tickets he wants to exchange for action figures at a prize booth. At this prize booth 5 tickets can be exchanged for a large action figure, and 7 tickets can be exchanged for 2 small action figures. The boy wants 4 times as many small action figures as ...
*December 18, 2014*

**Math**

Ohh okay. I get it now, thank you!
*December 18, 2014*

**Math**

Steve said that x+y = 14.. Steve also explained to you. *How are you confused on what numbers to multiply to get 59.50..?* if x+y = 14 then it would be x= 7 y=7 5x means 5 multiplied by x and x is 7. 5 times 7 is 35 so now its 35 + 3.50y 3.50 times 7 is 24.5 so now 35 + 24.5...
*December 18, 2014*

**Math**

8.5? Imma kinda confused on what numbers I need to multiply to get 59.50..
*December 18, 2014*

**Math**

She deposits $5 or $3.50 into her account. She made 14 deposits which equaled $59.50. how many times did she deposit $5 & how many times did she deposit $3.50 - I don't know how to do this!
*December 18, 2014*

**L.A **

This isn't a question but if you have helped me in L.A today thank you. I just want to thank everyone for the help and everyone for helping each other! Happy holidays and have a wonderful Winter Break! :-)
*December 18, 2014*

**language arts**

nevermind. Thanks!
*December 18, 2014*

**language arts**

ok thanks! can you check that for me? :)
*December 18, 2014*

**language arts**

Well B is one of them by the way(: I went over the chapter. It's definitely not C Again I re read the sentence " Sam Adams was so happy his hands shook worse then ever" and that show'd that doesn't determine what type of ruler general gage is. so.. I ...
*December 18, 2014*

**language arts**

What do you think is the other one and we can check
*December 18, 2014*

**Chemistry**

I need help with this question. 1. You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of pressure will the ...
*December 18, 2014*

**L.A help please**

did you find out what one was correct?
*December 18, 2014*

**Math **

What is the equation of the line that has a slope of 0 and passes through the point (6, -8) A. x=6 B. y=6 C. x=-8 D. y=-8
*December 18, 2014*

**business math**

toby signed a simple discount promissory note for $20,000. the discount rate is 8.5%, and the term of the note is 90 days. what are toby's proceeds on the loan?
*December 18, 2014*

**math**

A taco stand sells tacos for $3.25 each. The stand’s expenses for the day are $210. Define your variables and write an inequality to represent the amount of tacos they need to sell per day to make a profit, and then solve the inequality. Provide your conclusion as a ...
*December 18, 2014*

**math**

* not multiple choice* 2/3n = 8 solving the system of equations 4x + 3y = 13 y= -x +4 * not sure how to do this the slope intercept form of the function that contains the point (-3, 2) and has a slope of -2? my answer: y= -2x + 6 -1 + 5(6-y) my answer is -y + 29
*December 18, 2014*

**Algebra**

Thx. After getting rid of the fractions, I could easily use the quadratic formula to find the roots, (1, 2/3)! :D
*December 18, 2014*

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