Monday

February 8, 2016
Total # Posts: 986

**Math - Linear algebra**

Cats cost $1, dogs cost $15, and mice cost only $0.25. I want a herd of 100 animals, and I have $100, so being a cat lover, it's tempting to get only cats and mice. But I also want a dog, and my cat(s) want mice to "play" with, so the numbers of dogs, cats and ...
*September 11, 2011*

**Calculus**

If cos2 theta = 1/3 and 0 is less than or equal to 2 theta and 2 theta is less than equal to pi, find cos theta
*September 7, 2011*

**teacher aide language and other barriers**

to be a teacher aide in an esl classroom you should ? (a)have an ear for language(my answer) (b)recieve certifacation in esl instruction if possible (c)speak at least one other language besides english (d)have prior teacher aide experience in regular classroom
*August 26, 2011*

**Statistics**

The notion of statistical significance is frequently used in business to distinguish between true and spurious between-group differences (such as a difference between the response rates to two different promotions). Hence, when the difference between the baseline (no ...
*August 20, 2011*

**MATH**

cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I ask this question...
*July 15, 2011*

**MATH**

ok so I'm learning to solve problems like cos(x)=2 and sin(x)=5 I've wrapped my head around the process required to do so and I must say my brain is like @_@ mosh right now. Whenever I ask this question I never get a direct answer. I understand it's important to be...
*July 13, 2011*

**Law and Ethics**

Hi, I'm a incoming freshmen to a university. Over the summer I obtained the book that we would be using for a course. I have spent several hundred hours of self research and self teaching reading the whole entire book and solving every single problem in the book. It's ...
*July 12, 2011*

**MATHS**

Prove that one over one squared plus one over two squared plus one over three squared....... plus one over 1000 squared is smaller than two. Details please.
*July 9, 2011*

**Computer Science - MATLAB**

I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence...
*July 8, 2011*

**Computer Science - MATLAB**

One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a user input and ...
*July 8, 2011*

**help**

would he have to put it english
*July 6, 2011*

**help**

hi wanted to know if you guys could help my friend.the only thing is he justs writes in spanish
*July 6, 2011*

**QUESTION ABOUT JISHKA**

Do you guys have a tutor that specialized in computer science? I would expect that you guys would but I just wanted to make sure. I was wondering if any of the tutors knows the MATLAB programing language?
*July 6, 2011*

**Law**

for my CSE 1010 course I solved every single problem in my text book. Sense it's a electronic file I could easily publish it to the internet. My only concern is copyrights behind all of it. All work in the file is all my work, except for a few exceptions when I had to ask ...
*July 5, 2011*

**Law and Ethics**

Hi I have a question about law, like for civics and stuff... My neighbors foreclosed their house and completely destroyed their credit but saved a ton of money. I have recently got written permission from my neighbors to take some of their possessions inside that they left ...
*June 23, 2011*

**Chem**

Find [OH-] of 0.325 M (NH4)2SO4 and 0.490 M NH3
*June 21, 2011*

**chemistry**

which has a greater entropy: 300mL of hydrogen gas or 300mL of liquid hydrogen ?
*June 12, 2011*

**chemistry**

What is the IUPAC name for the following molecules: 1. CH3CH2N(CH2CH2CH3)CH2CH3 2. CH3CH2N(CH3)CH2CH3 I tried N,N-diethylpropanamine for the first one and N-methyl-3,4-ethanamine for the second one, but my instructor said they were wrong. If anyone could help me, that would be...
*May 28, 2011*

**Life orientation**

Yes
*May 22, 2011*

**Physics Calculation**

The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?
*May 14, 2011*

**physics**

i need to build a roller coaster, we can't use tubing to carry the ball so any ideas on what to use for the track? i was thinking no. 6 copper wire? i need to have 2 hills and a loop. how does this sound? 28" drop into a teardrop loop 12" high and back up hill #2...
*May 13, 2011*

**science**

i need to build a roller coaster but we can use tubing?? what can i use for a track
*May 13, 2011*

**chemistry**

SiH3- planar or pyramidal geometric shape?
*May 8, 2011*

**College Chemistry**

H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.
*May 8, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
*April 28, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
*April 28, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Do I ...
*April 27, 2011*

**Chemistry**

Please give me the formula for measuring turbidity. I already know about the wikipedia defintion and explanation. Thanks
*April 27, 2011*

**Chemistry**

Thanks, but I already knew about this.
*April 27, 2011*

**Chemistry**

What is the formula for measuring turbidity?
*April 27, 2011*

**Earth Science**

My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day. This is the raw data...
*April 25, 2011*

**Earth Science**

How do I ocnvert meters into cubic meters? For example: measuring areas and velocity I come up with this: area 1.55m x 27.47 = 42.74 velocity 21.9/172 seconds = 0.123 area x velocity = 5.22381 How do I convert 5.22381 into cms?
*April 24, 2011*

**Earth Science**

Ms. Sue, I coverted the minutes into seconds and here is what I got: April 4 172 April 5 160 April 6 126 April 11 77 April 12 59 April 13 70
*April 24, 2011*

**Earth Science**

This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters April ...
*April 24, 2011*

**Earth Science**

It is 2 minutes a 52 seconds.
*April 24, 2011*

**Earth Science**

I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.
*April 24, 2011*

**Physics**

i think the answer is big breasts
*April 15, 2011*

**Math**

compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding
*April 13, 2011*

**history**

What does concessions mean in the following paragraph? What were the concessions? The leader of the Czech Nazi Party, Konrad Henlein, was urged by Hitler to demand that the Czech government make concessions to the Sudeten Germans. Henlein kept the pressure on the Czechs by ...
*April 12, 2011*

**Chemistry**

I'm actually not sure how to do any of it.
*April 3, 2011*

**Chemistry**

A 50.0 mL sample of 0.12 M formic acid, HCOOH, a weak monoprotic acid, is titrated with 0.12 M NaOH. Calculate the pH at the following points in the titration. Ka of HCOOH = 1.8 multiplied by 10-4. What is the pH when 50.0 mL NaOH is added 60.0 mL NaOH is added 70.0 mL NaOH is...
*April 3, 2011*

**Chemistry**

A 50.0 mL sample of 0.23 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, is titrated with 0.14 M KOH. Ka of CH3CH2COOH = 1.4 multiplied by 10-5. What is the pH at equivalence point?
*April 3, 2011*

**Chemistry**

thanks!
*April 3, 2011*

**Chemistry**

The Ka values of H3PO4 are shown below. Ka1 7.5 multiplied by 10-3 Ka2 6.2 multiplied by 10-8 Ka3 4.8 multiplied by 10-13 What is the pH of a 0.14 M solution of Na2HPO4?
*April 3, 2011*

**Chemistry**

A 22.3 mL sample of a weak monoprotic acid, HX, requires 50.0 mL of 0.040 M NaOH to reach the equivalence point. After the addition of 30.0 mL of NaOH, the pH is 5.30. What is the Ka of HX?
*April 3, 2011*

**Chemistry**

A solution is prepared by dissolving 130 g of NaNO3 in 100 g of water at 80°C. The solution is cooled to 0°C. How many grams of compound remain in solution? How many grams of solid are formed?
*April 3, 2011*

**Algebra**

What is the remainder when the sum of the first 102 counting numbers is divided by 5250?
*April 2, 2011*

**home economics**

thank you
*April 1, 2011*

**home economics**

I have to make a cold dessert. I am thinking of making a trifle. I am not sure whether we will be able to heat the custard, can I use cold custard? Or is there something else I could use instead of custard. Any help would be good. Many thanks.
*April 1, 2011*

**Chemistry**

What is the chemical formula for this compound? sodium diamminetetrachloroplatinate(IV)
*March 27, 2011*

**chemistry**

What raw materials are used to make lithium ion batteries? How are the raw materials used in the batteries processed? What chemical equations take place in the battery?
*March 20, 2011*

**english (for Sra) repost**

Thankyou very much. Much appreciated :). George.
*March 20, 2011*

**english (for Sra) repost**

The Lady of Shalott I have two events and have to find the quotation. 1st event The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. 2nd event The Lady floats down the river past ...
*March 20, 2011*

**english (Sra)**

I have to find the quotation for two events. 1st event The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. 2nd event The Lady floats down the river past Camelot in a boat with ...
*March 19, 2011*

**english (Sra)**

Should I be looking at the words mirror or dazzling in the event to find the answer or should I be thinking of Lancelot as he rode down to Camelot. I am getting a bit confused. With the next one I am not sure whether I should be looking at the words name on boat, floated by, ...
*March 19, 2011*

**english**

The Lady of Shalott I have an event and have to find the quotation. 1) The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. The quotation I think it is, is: A bow-shot from bower-...
*March 19, 2011*

**physic**

it eats cheese for a living
*March 9, 2011*

**physics**

well, the answer is simple. it is one.
*March 9, 2011*

**statistics**

im so confused! please help! 3. A car manufacturer is interested in conducting a study to estimate the mean stopping distance for a new type of brakes when used in a car that is traveling at 60 miles per hour. These new brakes will be installed on cars of the same model and ...
*March 4, 2011*

**algebra**

Evaluate each logarithm. 3 to the 2nd power x plus five equals 9x plus 1. I can't seem to type the actual problem, which is why I wrote it out. I hope I wrote the problem right.
*February 28, 2011*

**algebra**

Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2 , and y = 8.
*February 27, 2011*

**Physics**

In an experiment using sodium light (λ=589 nm), the slits are 1.2 μm wide. You notice that every fourth fringes missing. a) What is the slit separation? b) How many fringes appear on the screen?
*February 27, 2011*

**physics**

12.2
*February 21, 2011*

**Physics**

I tried it but the answer is still wrong =/. I'm not so sure if this has something to do with the other equation n = c/v but I doubt it.
*February 18, 2011*

**Physics**

A tube with a length L is closed at both ends and is filled with air. The wavelength of the fundamental mode of this tube is given by L*c, where c is a dimensionless constant. What is this constant, c, numerically? Also, the frequency of the first overture is how many times ...
*February 18, 2011*

**Algebra 1-Matrix**

I think you should do the work yourself and quit relying on other people to do it for you.
*February 18, 2011*

**math**

i dont know what to do can you help me
*February 16, 2011*

**math**

4x-4y=1
*February 16, 2011*

**math**

i guess you need help aswell
*February 16, 2011*

**math**

-23 yes
*February 16, 2011*

**math**

it says i got it wrong
*February 16, 2011*

**math**

so far i have. 32x + 64 + x = -x + 9 +x
*February 16, 2011*

**math**

8(-4+8)=11-(x+2)
*February 16, 2011*

**Physics**

A 14.0 ohm resistor is made from a coil of copper wire whose total mass is 23.0 g. What is the diameter of the wire, and how long is it?
*February 6, 2011*

**Decision Analysis**

Kunfu Company is planning to build a new manufacturing and distribution facility in TT, KK, SS, CC or AA. The company has estimated the facility cost in each country will vary depending on the economic conditions prevailing. The table below provides the cost under three ...
*February 6, 2011*

**Quantitative analysis**

3. A service station owner sells Firm-on-the-road tyres which are ordered from a local tyre distributor. The distributor receives tyres from two plants, A and B. When the owner of the service station receives an order from the distributor, there is a 0.5 probability that the ...
*February 6, 2011*

**related rate problem**

A railroad track and a road cross at a right angle. An observer stands on the road 70 meters south of the crossing and watches an eastbound train traveling at 60 meters per second. At how many meters per second is the train moving away from the observer 4 seconds after it ...
*December 31, 2010*

**math**

The half life of iodine - 131 is 8 days. How long will it take for 7/8 of the sample to decay?
*December 29, 2010*

**physics**

I had completed the problem correctly until when finding I for a solid disk I used 1/4 instead of 1/2. Thank you
*December 19, 2010*

**physics**

A solid disk pulley of mass 2.00 kg and a radius of 30.0 cm is rotated by a block mass of 0.500 kg falling from rest, a distance of 4.00 m. What is the mass's acceleration and how much time elapses during its fall?
*December 19, 2010*

**Physics**

The question is worded incorrectly. So to further explain: there are two inclines, the bottom ends of both inclines are touching, so that as the ball rolls to the bottom of the first incline, it immediately begins to rise up the second incline. You are supposed to assume that ...
*December 19, 2010*

**Physics**

A solid sphere at rest at the top 12.0 m inclined plane rolls down the incline. How high vertically does it rise of the other incline?
*December 19, 2010*

**Physics**

Can someone help me get started on this problem? A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at ...
*December 19, 2010*

**Physics**

A super-hero is leaping from the roof of one building onto another. The first building is 120 meters high and the second building is 80 meters high. The horizontal velocity of the super-hero is 12.0 m/s. What is the maximum possible distance between buildings that the hero can...
*December 18, 2010*

**Physics**

A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at which point the horizontal distance will be zero). ...
*December 18, 2010*

**Physics**

You are the physics expert for a professional stuntman. The stunt you have designed includes a ramp that is angled at 30°. You expect that the stuntman will be traveling at 18.0 m/s when he leaves the ramp. How far must the landing ramp be positioned, and what is the ...
*December 18, 2010*

**Physics**

A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at which point the horizontal distance will be zero). ...
*December 18, 2010*

**Physics**

A bomber is flying at a velocity of 200.0 km/hr with an altitude of 1.5 km. How far (horizontally) from its intended target should the plane drop the bomb?
*December 18, 2010*

**Physics**

A super-hero is leaping from the roof of one building onto another. The first building is 120 meters high and the second building is 80 meters high. The horizontal velocity of the super-hero is 12.0 m/s. What is the maximum possible distance between buildings that the hero can...
*December 18, 2010*

**Physics**

A catapult throws a projectile at a 40.0° angle with a velocity of 26.0 m/s. How high will the projectile reach, and how far away will the projectile land?
*December 18, 2010*

**algebra**

-7+4=18
*December 14, 2010*

**maths**

divide both sides by e^2(ab). then u rewrite the equation for d= -e^2(ab).
*December 13, 2010*

**Math**

if you were listening in class you would know!!!!
*December 2, 2010*

**geometry**

i think in order to answer we need to know how these triangles are related. are they congruent?
*November 30, 2010*

**chem**

ok i see thanks
*November 30, 2010*

**math**

and sorry but how does it becom 1/5 i thought it would be 16/5 * 5/1
*November 29, 2010*

**math**

so when you * fractions you * both buttom and top all the time? and thank you
*November 29, 2010*

**math**

16over5 / 5 can you explan to me
*November 29, 2010*