Wednesday

September 28, 2016
Total # Posts: 404

**Calculus (pleas help!!!)**

Consider the parameterization of the unit circle given by x=cos(4t^2−t), y=sin(4t^2−t) for t in (−InF, INF). Describe in words and sketch how the circle is traced out, and use this to answer the following questions. (a) When is the parameterization tracing ...

*April 15, 2011*

**Calculus (please help!!!!)**

Consider the parameterization of the unit circle given by x=cos(4t^2−t), y=sin(4t^2−t) for t in (−InF, INF). Describe in words and sketch how the circle is traced out, and use this to answer the following questions. (a) When is the parameterization tracing ...

*April 14, 2011*

**Calculus (urgent!!)**

Ok..I found the problem with my first part, I accidentally typed cost(t)^2... Ok I'm still stucked with the last two parts, I don't know what to do with them....

*April 14, 2011*

**Calculus (urgent!!)**

A particle moves with its position given by x=cos(2t) and y=sin(t), where positions are given in feet from the origin and time t is in seconds. A)Find the speed of the particle. Speed = ____________ (include units) B)Find the first positive time when the particle comes to a ...

*April 14, 2011*

**Calculus (please help!!!)**

I typed 0 for the time, since it was at (0,1) when it started, and slected yes for part c, I have part A and B wrong, I don't know how to write the intervals from part A and I didn't see any counter-clockwise motion... please explain...

*April 14, 2011*

**Calculus (please help!!!)**

Consider the parameterization of the unit circle given by x=cos(4t^2−t), y=sin(4t^2−t) for t in (−InF, INF). Describe in words and sketch how the circle is traced out, and use this to answer the following questions. (a) When is the parameterization tracing ...

*April 14, 2011*

**Calculus**

What I thought that I had to do was to take the derivative, (2/x)/2x and then plug in 2... and that's how I got 1/4, but that's not the answer, what do I have to do?

*April 13, 2011*

**Calculus**

I thought that it was 1/4 but that's now the answer....

*April 13, 2011*

**Calculus**

Find the limit: lim x-> 2 ln(x/2)/ (x^2−4) Can someone help me with this?

*April 13, 2011*

**English**

I just typed the passage. My assignment is to make a high level (8th grade) question for the passage. What do you mean by my analysis?

*April 13, 2011*

**English**

What are some high level questions about the moon? Please put at least 4. What are some high level questions for this passage? There was once a sheperd who loved his sheep but was growing tire of caring for them. One hot day, he sat down under a tree and pondered what to do ...

*April 13, 2011*

**English**

thanks!

*April 7, 2011*

**English**

What are the steps for editing?

*April 7, 2011*

**Calculus (urgent!!)**

Please answer the following questions about the function f(x)=e^(-0.5x^2) Instructions: If you are asked to find x- or y-values, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if you are asked to ...

*April 6, 2011*

**Calculus (pleas help!!!)**

Please answer the following questions about the function f(x)=e^(-0.5x^2) Instructions: If you are asked to find x- or y-values, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if you are asked to ...

*April 5, 2011*

**Calculus (pleas help!!!)**

Please answer the following questions about the function f(x)=e^(-0.5x^2) Instructions: If you are asked to find x- or y-values, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if you are asked to ...

*April 5, 2011*

**Calculus**

Find the global maximum and minimum values of f(t)=4t/(2+t^2) if its domain is all real numbers?

*April 5, 2011*

**Math-REALLY CONFUSED**

On the worksheet it showed an example, and for a quadrilateral it showed only 1 diagonal, so it didn't do all the diagonals or it would be 2, so I did only the diagonals from one corner, which is 4. I just now divided 900 by 7,(using a calculator) and the answer was 128....

*March 21, 2011*

**Math-REALLY CONFUSED**

Thanks. Yeah I tried 900 divided by 7, but it kept going on and on and on and on and on. Unless I calculated wrong.

*March 21, 2011*

**Math-REALLY CONFUSED**

Ok, so this worksheet says that a regular heptagon has 7 sides. So, would it have 7 angles, 4 diagonals, 5 triangles, and that the angle sum of the figure is 900 degrees. Am I right on those? But then it says to find the "Measure of each angle". Wouldn't it would...

*March 21, 2011*

**separation of variables**

if dy/dx=-3y and y=1 when t=0, what is the value of t for which y=1/3?

*March 19, 2011*

**separation of variables**

find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3

*March 19, 2011*

**Calculus (pleas help!!!)**

A) If x^2+y^3−xy^2=5, find dy/dx in terms of x and y. dy/dx=________ B) Using your answer for dy/dx, fill in the following table of approximate y-values of points on the curve near x=1 y=2. 0.96 ______ 0.98 ______ 1.02 ______ 1.04 ______ C) Finally, find the y-value for ...

*March 16, 2011*

**Calculus Please Help**

I see what is wrong with my equation... now I have (-2x+y^2)/(3y^2-x2y) and for the second part I tried to plug 1 for x and all the other values for y and then in the third part I plugged 2 for y and 0.96 for x and I got them all wrong: my values are: 0.96 = -1.2765 0.98= -1....

*March 15, 2011*

**Calculus Please Help**

In the first part... I got (-2x+y^2)/(3y^2+x2y) but apparently that's wrong which will make everything else wrong.... I just need to know how to do that part right...

*March 15, 2011*

**Calculus Please Help**

A) If x^2+y^3−xy^2=5, find dy/dx in terms of x and y. dy/dx=________ B) Using your answer for dy/dx, fill in the following table of approximate y-values of points on the curve near x=1 y=2. 0.96 ______ 0.98 ______ 1.02 ______ 1.04 ______ C) Finally, find the y-value for...

*March 15, 2011*

**Calculus**

But that's not the answer...

*March 15, 2011*

**Calculus**

I solved and I got: (9-lny)/(x((x/y)+6y^5))

*March 15, 2011*

**Calculus**

Find dy/dx in terms of x and y if xlny+y^6= (9)lnx

*March 15, 2011*

**Calculus**

Find dy/dx in terms of x and y if xlny+y^6= (9)lnx

*March 15, 2011*

**Calculus**

Oh never mind I got the answer... -6(cosw^5sinw+w^5sin(w^6)) just missing the ^5

*March 9, 2011*

**Calculus**

Find the derivative of y=cos^6w+cos(w^6) The answer I have is -6(cosw^5sinw+wsin(w^6)) but it's not right...

*March 9, 2011*

**Calculus**

But why is b -2?

*March 9, 2011*

**Calculus**

How did you get the -2 at the beginning?

*March 9, 2011*

**Calculus**

Find the derivative of (b/(a+z^2))^2 Assuming that a and b are constants...

*March 9, 2011*

**Math-CHECK PLEASE**

Thanks so much!! :D

*March 8, 2011*

**Math-CHECK PLEASE**

Which of the statements is ALWAYS TRUE? A-A right triangle is a scalene triangle. B-An equilateral triangle is an isosceles triangle. C-An isosceles triangle is an obtuse triangle. D-A right triangle is an acute triangle. I got either A or D. I don't know. Also, if angle A...

*March 8, 2011*

**3rd grade mathath**

I think that you have to move 10 degrees, but I am not sure.

*March 8, 2011*

**math HELP!!**

If 4/8 is meant to simplify to 1/2, so yes, they are all simplified. If 4/8 and 1/2 are seperate, then no, because 4/8 simplifies to 1/2.

*March 8, 2011*

**Math**

Oh. ok. thanks.

*March 7, 2011*

**Math**

A trapezoid has to have one pair of parallel lines, right? If a shape isn't a trapezoid because it has no parallel lines, no equal sides, but has four sides, what is it? The question wanted the best descriptive name.

*March 7, 2011*

**6th grade math**

The height is 8 meters, because L times W times H equals volume, and 12 times 6 equals 72, and 576 divided by 72 is 8.

*March 7, 2011*

**Writing-Please Help! :(**

I guess. Hm. Life.... wife....... stife.......... pife.... gife...... rife.........

*March 7, 2011*

**Writing-Please Help! :(**

But this is a letter to my mom... it's supposed to thank her for all the things she's done.

*March 7, 2011*

**Writing-Please Help! :(**

Um........ Not really, because I want words that are sentimental-ish.

*March 7, 2011*

**Writing-Please Help! :(**

I couldn't find anything.

*March 7, 2011*

**Writing-Please Help! :(**

What is a word that ryhmes with life, but goes with the words: love and life?

*March 7, 2011*

**fact and opinons**

I think that it is an opinion, because if you ask around, some people may not say so.

*March 7, 2011*

**Social Studies**

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SO FREAKING MUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

*March 5, 2011*

**Social Studies**

What are some things that start with or have x and y in them that can be found in Sudan? I've looked EVERYWHERE. Except Sudan literally.

*March 5, 2011*

**Social Studies-URGENT**

Thanks.

*March 4, 2011*

**Social Studies-URGENT**

I'm doing a project for social studies, and I want to know if the African Queen Lily grows in Sudan. Please help!

*March 4, 2011*

**Math-HELP PLEASE**

Anita says that the plus sign + forms 2 pairs of verticle angles. Charles says it forms two pairs of congruent angles. Who is correct?

*March 1, 2011*

**Math**

If something is $99.99, and it is 55% off, would the price be $44.99 or $45.00? If something is $67.99, and it is 25% off, would the percent off be $16.99 or $17.00?

*February 28, 2011*

**Math**

ya........ i put the wrong thing.

*February 28, 2011*

**Math**

oops...... wrong question.

*February 28, 2011*

**Math**

Can you just help me? So, if something is $99.99, and it is 55% off, would the price be $44.99 or $45.00? And of something is $67.99, and is 25% off, would the price be $16.99 or $17.00?

*February 28, 2011*

**Chemistry**

What is the product of the following reaction: Mn(s) + Cu(NO3)2 -> I just want to make sure if it's Mn+2 + Cu(s) or if there's no reaction...

*February 25, 2011*

**Geometry**

Thanks though.

*February 24, 2011*

**Geometry**

Hmph.

*February 24, 2011*

**Geometry**

Are perpendicular lines the same as intersecting lines?

*February 24, 2011*

**Science**

a moluclue is two or more atoms put together, or the smallest particle of a compound that has all the chemical properties of that compound.

*February 24, 2011*

**Chemistry**

The indicator Methyl Yellow changes from red to yellow over the pH range of 2.9-4.0. A second indicator, Bromcresol Purple., changes from yellow tored over the pH range of 5.4 - 6.8. You conduct an experiment in which a sample of HCl is titrated with NaOh, and HCl is the ...

*February 24, 2011*

**Science**

Yeah my teacher just wanted a model, representing the Earth. She said you could do it on paper, edible. I did what you said, and since this is due tomorrow, I was freaking out.

*February 21, 2011*

**Science**

Ok, so I'm doing a project on the Earth's layers, and I just have a question on the model. DOES IT HAVE TO BE 3-D? If it is, I'm dead meat.

*February 21, 2011*

**Art**

Hi- I have to do an Art analysis on 'Diamond Dust Shoes' by Andy Warhol, and am a bit stuck on the part "what do you think the artist was trying to say?" I am in yr 8, and was wondering if anyone had any suggestions :) Thank you!

*February 21, 2011*

**physics**

A string is tightly stretched between the point A-G at point C it's lightly pinch and point B it's plucked, at points DEF are light folded tissue paper the segments A to BB to CC to DD to E and EG are all equal in length, what happen to the tissue paper does it fall or...

*February 21, 2011*

**Physics (please help!!!!)**

It's ok I got it, it's 243 N...

*February 18, 2011*

**Physics (please help!!!!)**

A suitcase of weight mg = 450 is being pulled by a small strap across a level floor. The coefficient of kinetic friction between the suitcase and the floor =0.640 a) Find the optimal angle of the strap above the horizontal. (The optimal angle minimizes the force necessary to ...

*February 18, 2011*

**I really really need help with this problem ASAP! please**

Please

*February 18, 2011*

**Physics (please help!!)**

Oh my answer is right... can someone tell me how to calculate the minimum tension in the strap needed to pull teh suitcase at constant speed? My answer for the tension is 534N and I know it's wrong...

*February 18, 2011*

**Physics (please help!!!!)**

My answer is 32.6...is that right? If not please tell me how you did it...

*February 18, 2011*

**Physics (please help!!)**

A suitcase of weight mg = 450 is being pulled by a small strap across a level floor. The coefficient of kinetic friction between the suitcase and the floor =0.640 a) Find the optimal angle of the strap above the horizontal. (The optimal angle minimizes the force necessary to ...

*February 18, 2011*

**Calculus Please Help**

Hello I'm reposting this question because right now it's at the bottom and I don't think I will get an answer. Assume that the follwing function gives the position of an object at time t. Find the velocity indicated by setting up and evaluating a limt algebraically...

*February 17, 2011*

**Calculus Please Help**

Find k for which the limit below exists, and find the limit. lim x->1 (2x^2 + kx +4)/(x-1) Please show me how to do both procedures. Thanks

*February 17, 2011*

**Calculus (pleas help I really need to check this)**

Could you please tell me how to do it evaluating the limt algebraically? I'm trying to do it and I can't get it....

*February 17, 2011*

**Calculus (pleas help I really need to check this)**

Thank you very much for the clarification, could you explain to me how you got 1/2 in c please??

*February 17, 2011*

**Calculus (pleas help I really need to check this)**

Assume that each of the follwing functions gives the position of an object at time t. Find the velocities indicated by setting up and evaluating a limt algebraically. (a) s(t) = 3t^2, Find v(-1). (b) s(t) = 1/t , Find v(2). (c) s(t) = square root of t, Find v(1). The answers ...

*February 17, 2011*

**Calculus**

Assume that each of the follwing functions gives the position of an object at time t. Find the velocities indicated by setting up and evaluating a limt algebraically. (a) s(t) = 3t^2, Find v(-1). (b) s(t) = 1/t , Find v(2). (c) s(t) = square root of t, Find v(1). The answers ...

*February 17, 2011*

**Math**

If a guy has run 45 minutes, and this is only 60% of his whole run, is 100% 75 minutes?

*February 16, 2011*

**Math**

oh....... I can do 8/10=4/5. Thanks!

*January 31, 2011*

**Math**

If I have 4 triangles and 6 circles, what is a proportion that I can make? If I have 8 hearts and 10 diamonds, what is a proportion I can make?

*January 31, 2011*

**English**

How many adjectives are in this sentence? That glossy, red apple rolled out of the grocery bag and across the smooth table.

*January 27, 2011*

**spelling**

brother:mother::fly:?

*January 27, 2011*

**Organic Chemistry**

Student A conducted the acid-catalyzed dehydration of ethanol at 180°C and obtained a gaseous product. Student B conducted the same experiment at 140 °C and obtained a lowboiling liquid. What were the products that each of the students made? Draw mechanisms for the ...

*January 22, 2011*

**English**

Yay!

*January 19, 2011*

**English**

You had to say whether or not the underlined word was adjective or pronoun. Can you check? -That- is my favorite fiction book. -That- is a pronoun. -This- is a good collection of books, too. -This- is a pronoun. -These- are good to read. -These- is a pronoun.

*January 19, 2011*

**English**

Thanks! I am home alone and I don't like english..

*January 19, 2011*

**English**

This isn't that hard(ok maybe it is) but I just want you to check. We had to say whether of not the underlined word was a adjective of noun. The ones I had trouble with were: She certainly had a -spring- in her step that day! -Spring- is a noun Only the -steel- rim was ...

*January 19, 2011*

**MATH**

Amtrail trains provide efficient, nonstop transportation between Los Angeles and San Diego. Train A leaves Los Angeles headed toward San Diego at the same time that Train B leaves San Diego headed for Los Angeles, traveling on parallel tracks. Train A travels at a constant ...

*January 12, 2011*

**English**

Thanks! English is not my strong subject.

*January 11, 2011*

**English**

Ok, so for the other three sentences I got: Third group-describes flute and instruments small-describes keys burst-describes air large-describes pipes most,wind-describes instruments

*January 11, 2011*

**English**

What is the adjective in the sentence: It is about the same size as the United States. Also, what are the adjectives and what do they describe in the sentences: The flutes are a third group of instruments. The small keys send a burst of air to large pipes in the instruments. ...

*January 11, 2011*

**Math**

This question HATES ME! Which value would best describes the data? 8, 9, 10, 12, 14, 15, 18, 18, 63. A-mean B-mode C-median D-

*January 10, 2011*

**algebra 2**

At a flea market held each weekend, an artist sells handmade earrings. The table below shows the average number of pairs of earrings sold for several prices. Given the pattern in the table, how much should the artist charge to maximize revenue? Table: price: $15 $14 $13 $12 ...

*January 4, 2011*

**DRESS DECORATION**

A BODKIN IS USED IN MAKING WHICH ONE OF THE FOLLOWING?

*January 3, 2011*

**Science**

3 CaSO4 + 2 AlCl3 Al2(SO4)3 + 3 CaCl2 How many moles of aluminum chloride are required to produce 97.0 g of calcuim chloride in the above reaction?

*December 16, 2010*

**physics**

An airplane traveling a constant 100.0 m/s is to drop supplies to flood victims isolated on a patch of land 200.0 m below. A) The supplies should be dropped how many seconds before the plane is directly overhead? B) What is the distance of the plane away from being directly ...

*December 6, 2010*

**physics**

A driver is running 3.6 m/s and dives out horizontally from the edge of a vertical cliff and reaches the water below 2.0s later. A) How high was the cliff? B) How far from its base did the driver hit the water?

*December 6, 2010*