Saturday

February 28, 2015

February 28, 2015

Total # Posts: 465

**Science**

Chargers extend the life of the rechargeable batteries by: A) adding protons to the positive electrode B) adding electrons to the positive electrode C) moving electrons back to the positive electrode D) Moving electrons back to the negative electrode
*February 25, 2015*

**science**

please explain why
*February 9, 2015*

**science**

is this an open or closed system? baking soda reacting with vinegar
*February 9, 2015*

**math**

how to rewrite the radical (index is 8)√5^2 as 5 to the power of a rational exponent ?
*February 6, 2015*

**math**

A room measure 12fy by 15ft find the scale that would allow the room to be showed large as possible on a piece of paper 7in by 8in explain your reasoning
*January 27, 2015*

**Art check please**

yup, those are right, in my opinion!
*January 23, 2015*

**maths literacy geog business studies bio English a**

What can I study after school with the following subjects maths literacy business studies bio English lo Afrikaans geog
*December 17, 2014*

**chemistry**

What mass of AuCl3 contains 160.9 g of gold? My work i got 104.6 g is that correct
*November 24, 2014*

**Math**

What type of function is f(x)=1.3^x? Also, what type of function is f(x)=(x-5)/(x^2-2x+3)?
*September 28, 2014*

**ecology**

The Nile perch population explosion has been accompanied by: a decrease in the dissolved oxygen in the shallowest portions of Lake Victoria. a decrease in the dissolved oxygen in the deepest portions of Lake Victoria. an increase in the dissolved oxygen in the deepest portions...
*September 21, 2014*

**simple interest**

Jimmy invests 15,000 coins in a bank and earns simple interest. After 2 years he withdraws all his money from the bank .If the amount that he receives is 17,000 coins ,calculate. (a)the interest received (b)the rate at which bank pays interest.
*September 20, 2014*

**Physics**

An object has a initial velocity of 10 m/s in the positive x direction. Under a constant acceleration it stops after undergoing a displacement of 148.3 m in the positive x direction. Because it is still under the same acceleration it then travels back in the negative in the x ...
*September 4, 2014*

**Math**

A student goes through seven class periods in school. Each period lasts 55 minutes. How many hours does he spend in class per week?
*August 29, 2014*

**Excel Macro Question**

Question has been solved. Please remove if possible!
*May 20, 2014*

**physic angular momentum and torque**

What is the angular momentum of a figure skater spinning at 2.7rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m , a radius of 14cm , and a mass of 50kg How much torque is required to slow her to a stop in 4.4s , assuming she ...
*March 29, 2014*

**Physics**

The Lamborghini Murcielago can accelerate from 0 to 27.8 m/s (100 km/hr or 62.2 mi/hr) in a time of 3.40 seconds. How fast will the car be traveling (m/s) after 5.1 seconds.
*February 22, 2014*

**science**

That's definitely b. (^-^)
*January 7, 2014*

**Geometry.**

can you imply something if you are given that two altitudes intersect in a triangle?
*December 19, 2013*

**Geometry.**

prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??
*December 19, 2013*

**Social Studies**

i don a lot of research but yes they won
*December 17, 2013*

**science**

Why are liners laid down at the bottom of a landfill before waste in the landfill?
*December 11, 2013*

**science**

That is what it said in the book. What is the right answer?
*December 11, 2013*

**science**

No wait it is A
*December 11, 2013*

**science**

which of the following would be most likely to lead to increase biodiversity? A.clear-cutting B.oil drilling C.national park planning D.farming
*December 11, 2013*

**Early Childhood Education**

A disadvantage of large group times is: A. language is enjoyed as a group. B. children develop an understanding of being a group member. C. the difficulty of having intimate conversations. D. they are often seen as sharing times. In a study about kindergarten readiness, which ...
*December 11, 2013*

**Algebra**

Thank guys :)
*December 5, 2013*

**Algebra**

What are the zeroes of y = x2 – 2x – 15? –3, –5 3, 5 –3, 5 3, –5
*December 5, 2013*

**Math**

1. What is the vertex of each of these parabolas? a. y = (x –7)2 +4 b. y = 3(x + 7)2 – 4
*November 13, 2013*

**Math HELP**

If log a = 3, what is log a4?
*November 4, 2013*

**math**

Assume you have $1,000 and find a place to invest it that will give you 5% compounded annually. a. How long will it take your investment to be worth $1,500? b. Is it worth your while to run around and find another place which will give you 5% interest compounded daily? Explain...
*November 4, 2013*

**MatH HELP**

Kensin longs to own a Maserati. He can afford $40,000 for a car. If this year’s model sells for $135,000 and will depreciate at 10% a year, in how many years will he be able to afford this model Maserati?
*November 4, 2013*

**Alegbra Help**

Find the domain of: 6/(9-4x) 7/(x^2-8x) (x^2+9x)/(x^3-13x^2+40x)
*October 26, 2013*

**MATH HELP**

Derrick is investing $1,000 at 5% interest and Anna is investing $750 at 7% interest. Both interest rates are compounded annually. When will they have the same amount saved? (Hint: 1.05t/1.07t =(1.05/1.07)t )
*October 24, 2013*

**Math HELP**

When a Superball bounces it is claimed that the height of any bounce is 90% of the height of the last bounce. If a Superball is dropped out of a second story window at the height of 200 feet. On which bounce would it bounce just one foot?
*October 21, 2013*

**MATH HELP**

Log 1000 =a Log a =1 Log a = -1 What is the vaule of A
*October 21, 2013*

**math**

find the product to (2x+4y)(8x+3y)
*October 16, 2013*

**Math PLEASE HELP ME!!**

How would you solve this inequality -3(n+8)<-17-3n
*September 30, 2013*

**Math**

How would you solve this inequality -3(n+8)<-17-3n
*September 30, 2013*

**Math**

A room contains 8 crates. Each crate contains 8 boxes. Each box contains 8 bags. Each bag contains 8 balloons. a) How many balloons are in the room? b) Express the numbers of balloons as a power. Identify the base and the exponent. please help i understand a) that u have to ...
*September 9, 2013*

**algebra 1A**

What's 35ab/105bc simplified
*September 3, 2013*

**physics**

A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...
*July 16, 2013*

**College Physics**

Sorry, I meant 250 not 225. Either way its still not the correct answer..
*July 13, 2013*

**College Physics**

A 7 kg mass hangs on a 10 meter long weightless cord. To the nearest cm, what should the new length of the pendulum be in order that the new frequency be 1.8 times its current value? The correct answer is 309 but I got 250. Heres what I did.. (1/2pi)(sqrt g/L2) = (2/2pi)(sqrt ...
*July 13, 2013*

**College Physics**

7 Moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 1000 cm3 to a volume of 316 cm3. To the nearest tenth of a kJ what is the work done by the piston? (It is a monatomic ideal gas.) I have W = (3/2)nRT1(V1^(gamma-1) V2^(1-gamma) ...
*July 13, 2013*

**physics**

A 950-kg race car can drive around an unbanked turn at a maximum speed of 46 m/s without slipping. The turn has a radius of 120 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of ...
*July 1, 2013*

**Trigonometric Functions! (Ferris Wheel)**

Thank you very much Steve!
*May 21, 2013*

**Trigonometric Functions! (Ferris Wheel)**

The Ferris wheel at a carnival has a diameter of 18m and descends to 2m above the ground at its lowest point. Assume that a rider enters a car at this point and rides the wheel for two revolutions My main problem is how to get the phase shift. (The answer says its 270 degrees)
*May 21, 2013*

**Periodic Function (Trigonometric Fuctions)**

A lighthouse beacon rotates through 360 degrees every 12 seconds, it is located 100 m off the shore of an island with a coastline of steep cliffs running north and south. As the light beam sweeps clockwise, starting from the north (direction of 0 degrees), it strikes some part...
*May 20, 2013*

**math**

Will someone please help me with this problem. Simplify the expression, if possible. log 1.
*May 5, 2013*

**math**

Any of the ten digits 0 through 9 may be used in a 6-digit code, but no digit may be used more than once. If the first two digits are 1 and 7, what is the largest possible average of all 6 digits? a)4 b)6 c)6.5 d) 7
*April 18, 2013*

**English**

Thank you This what I have but I'm not sure if it's correct. 1. A ; 2. C ;
*April 16, 2013*

**English**

I need help with these questions. Which of the following options best demonstrates sentence fluency? A. The city looked beautiful in that it was lit by the sun while I was walking down the street. B. Walking down the street in the sunshine, the city looked beautiful. C. The ...
*April 16, 2013*

**math**

Solve negative five-ninths equals negative two v minus one-third for v. choices four-ninths negative one-eighteenth one-ninth five-sixths
*April 7, 2013*

**Chemeistry**

when 4.50 g of fe2o3 is reduced with excess h2 in a furnace, 2.6 g of iron metal is recovered. What is the percent yield when molar mass of Fe2O3 is 159.7
*March 25, 2013*

**Pre-Algebra**

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...
*March 25, 2013*

**Pre-Algebra**

Thank You So Much Linzy :)
*March 25, 2013*

**Pre-Algebra**

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...
*March 25, 2013*

**social studies**

OK,I will thank you so much Ms. Sue !!!!! :D !!!! HAVE A NICE DAY :D
*March 11, 2013*

**social studies**

Compare and contrast how the United States and Canada achieved independence. Why do you think the United States has 10 times more people than Canada? Explain one way that ethnic groups in the U.S. and Canada are similar and one way that they are different.
*March 11, 2013*

**Math**

Find the area for a triangle: base 14 cm, height 5.5 cm. 19.5 cm² 77 cm² 38.5 cm² 770 cm²
*February 25, 2013*

**math**

I only need help with B. I have already figured out A and C
*February 18, 2013*

**math**

q = 350 − 5p (a) Enter the equation for revenue R as a function of price p. R = (b) What is the (instantaneous) rate of change of revenue with respect to price when the price is $6? (c) At what price is the derivative of revenue with respect to price exactly zero?
*February 18, 2013*

**languagge/french**

thank you
*February 17, 2013*

**languagge/french**

i saw it on google but for the other sports i don't seem to find the right vocbulary
*February 17, 2013*

**languagge/french**

what are some winter sports written in french like for example skiing is "ski du faire". please help
*February 17, 2013*

**ENG1511**

This is great news indeed, I can't believe I made it!
*February 15, 2013*

**Calculus**

Given a function f(x)=sqrt(100-x^2) Evaluate the integral xsqrt(100-x^2dx) for the interval (0,10)
*February 10, 2013*

**math**

7 3/5 ft = how many yards?? How do I do this??
*January 27, 2013*

**Math 6 help ??????**

Thanks! I understand it clearly !
*January 27, 2013*

**Math help Thanks!**

Yeah! Thanks!
*January 27, 2013*

**Math help**

You buy sneakers at 2/3 of their original prioce of $60 = $40 A sweater at 7/10 of its oreginal price of $35 = 24.5 And a jacket at 5/6 of its oreginal price of $45 = $37.5 So you spent $ 102 Saved (origianl cost - buying cost) ( 60+35+45) - (102) = $38 The fraction is 38/140 ...
*January 27, 2013*

**Math help**

You buy clothing at a sale. You buy sneakers at 2/3 of their original price of $60, a sweater at 7/10 of its original price of $35, and a jacket at 5/6 of its original price of $45. Answer each question and show all your work. a. How much money did you spend? b. How much money...
*January 27, 2013*

**Math**

Jennifer started with $50 in her savings account. Each week she withdrew $10. The amount of money in her savings account after x weeks is represented by the function f(x) = 50 - 10x. Find the intercepts.
*January 25, 2013*

**Math Please it is Urgent!!!**

ME 2
*January 23, 2013*

**Math PLEASE HELP!!!**

Part 1: A rectangular box is 2 inches high, 3.5 inches wide amd 4 inches long. A cyliner box is 3.5 inches high and has a diameter of 3.2 inches. Use 3.14 for pi. Round to the nearest tenth. Part 2: whWhich box has a larger volume. How much bigger is the larger box?
*January 10, 2013*

**Math I REALLY NEED HELP!!!!!!!!!**

A refrigerator has inside measuremnets of 50 cm by 118 cm by 44 cm. What is the capacity of the refrigerator?
*January 10, 2013*

**Math PLEASE HELP!!!**

A contractor pours a sidewalk that is 4 inches deep, 1 yard wide, and 20 yards long. How many cubic yards of concrete will be need? (Hint: 36 inches = 1 yard)
*January 10, 2013*

**Math PLEASE HELP!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4) No one has answered
*January 9, 2013*

**Math I REALLY NEED HELP!!!!!!!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4)
*January 9, 2013*

**Math I REALLY NEED HELP!!!!!!!!!**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20
*January 9, 2013*

**Math**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20
*January 9, 2013*

**Math**

Joe pick 112
*December 30, 2012*

**Math**

John has 11 more quarters than dimes. He has a total of $7.65. How many quarters and dimes does he have?
*December 7, 2012*

**Math (trigonometry)**

MONDAY December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th...
*December 3, 2012*

**Math (trigonometry)**

From the top* of a cliff, not from the drop of a cliff.
*December 3, 2012*

**Math (trigonometry)**

From a boat on the water, the angle of elevation of the drop of a cliff is 31°. From a point 300 m closer, the angle of elevation is 33°. Find the height of the cliff. the answer should be 2411 m. I had tan31° = h/x+(x-300) tan33° = h/x-300 -> (x-300)tan33&...
*December 3, 2012*

**Math (trigonometry)**

How do you get the second triangle when you have an ambiguous case of sine law? For example, if you are given the following information for a triangle: a = 7.2 mm, b = 9.3 mm, <A = 35° I can solve for one triangle: Find <B, <C, side c. <B: sinB/9.3 = sin35°...
*December 2, 2012*

**Math (trigonometry)**

But in the triangle I was thinking of/the one I drew, the mountain is inside triangle ABC...? I don't really understand why I would have to take the supplementary angle of 22.3; I'm not disagreeing with you, I can see that you're right, I just don't understand ...
*December 2, 2012*

**Math (trigonometry)**

Sorry, a) should say, "calculate the distance to the top of the mountain from point A," not point B.
*December 2, 2012*

**Math (trigonometry)**

A surveyor wishes to find the height of a mountain. He selects points A and B on level ground along the same line of sight to the mountain. He measures the distance AB to be 1503 m and the angles of elevation of the top of the mountain from the points to be 16.9° from A ...
*December 2, 2012*

**Math 8R**

You're welcome.
*December 2, 2012*

**Math 8R**

The square root of 1/16 is 0.25 which is a real number. When the number under the square root is negative , that's when you have a number that is not real.
*December 2, 2012*

**Math 8R**

Sorry, completely misread the order of the letters. No, b is correct. Because 13/0 is undefined.
*December 2, 2012*

**Math 8R**

Yes.
*December 2, 2012*

**Math (trigonometry)**

Oh! Wait, sorry, again. Never mind. That was really stupid of me. I don't know how I didn't see it, but I realise what was wrong now, thank you
*December 2, 2012*

**Math (trigonometry)**

Oh, never mind about not being able to visualise your proof at the end, I completely misread that, wow. But my diagram is still incorrect somehow because 27.4 is the adjacent side..
*December 2, 2012*

**Math (trigonometry)**

I think I may need to rethink this question because in the diagram I drew, 27.4 m is adjacent to the 45° angle. And the proof you showed me at the end cannot be visualised in my diagram.. Would it be possible for you to explain in words (I know it's really hard..) what...
*December 2, 2012*

**Math (trigonometry)**

A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal places) from ...
*December 2, 2012*

**Math**

no problem sorry again have a nice day =)
*November 30, 2012*

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