Thursday

March 5, 2015

March 5, 2015

Total # Posts: 42

**Chemistry**

Sorry for all the posts when I did the math your way I got 97.3 degress Celcius which does not make sense either because that would be higher then the starting temperature :S
*January 11, 2013*

**Chemistry**

I completed the math using your solution and it worked I have the concept of heat gained and heat lost confused could you assist with that?
*January 11, 2013*

**Chemistry**

Hello thanks for the reply that is what I had done but I keep getting a value that does not make sense. I possibly have the negative/positive signs mixed up. I know that heat is conserved so the heat lost by the milk would equal the heat gained by the ice. In your post you ...
*January 11, 2013*

**Chemistry**

On more than one occasion when our kids were small, we would come inside from playing in the snow and I would make hot chocolate by heating the chocolate milk in the microwave. Invariably, I would get the milk too hot for at least one of them. One time, rather than adding more...
*January 11, 2013*

**US and Global Economics**

(This homework question was removed due to a copyright claim submitted by K12 Inc.) Please help?
*October 11, 2012*

**german**

Think of a funny cartoon that you like. Choose a character or two from that cartoon and write 3-5 sentences telling what those characters did in the cartoon you watched. Use the simple past verb tense to write your sentences. ****I was thinking about doing 3-5 sentences on Tom...
*October 6, 2012*

**trig**

6. Compute the modulus and argument of each complex number. I did a-c and f. D. -5 E. -5+5i G. -3-4i 7. Let z= -5sqrt3/2+5/2i and w= 1+sqrt3i a. convert z and w to polar form b. calculate zw using De Moivres Theorem c. calculate (z/w) using De M's theorem Please help with ...
*May 23, 2012*

**Trig**

yes. sorry. I forgot the comma
*May 22, 2012*

**Trig**

what are the rectangular coordinates of (-2(pi/6))? please help.
*May 22, 2012*

**english**

What do the pieces you read by Richard Rodriguez, Amy Tan, and Julia Alvarez illustrate about the immigrant experience in twentieth-century America? How are the children in these works different from their parents? Use specific examples from the text in your response. Please ...
*May 21, 2012*

**English**

Consider the poems, short stories, and autobiographical pieces you read from the first half of the twentieth century during this semester. How did historical events and realities affect writers who were working during this time? What common threads did you observe in the works...
*May 21, 2012*

**Chem**

Chalcocite is an ore from which copper can be extracted for commercial use. The formula for this important ore is Cu2S. In the laboratory it is formed by the following reaction: 2Cu + S → Cu2S The reaction takes place in laboratory conditions that allow the reactant ...
*April 28, 2012*

**Trig**

thank you so much!
*April 13, 2012*

**Trig**

can I please have help with these 3 questions? 1. Solve this equation graphically on the interval [0, 2ð]. list the solutions. sin(2x)-1=tan x 2. solve sin x cos x= sqrt3/4 3. solve tan^2 x-3tan x+2=0 thank you! show step by step please.
*April 13, 2012*

**History**

thank you. :)
*March 22, 2012*

**History**

Imagine you are living in Los Angeles in 1944 and have just read about the case of Korematsu v. the United States. Write a letter to the editor of the Los Angeles Times telling which opinion in the case (majority or dissenting) you support and explain why. Help please? I have ...
*March 22, 2012*

**trig**

thank you so much! :)
*March 17, 2012*

**trig**

solve for theta 6. tan theta=-1 7. sin(theta/2)=1/2 thank you for your help!
*March 17, 2012*

**trig**

solve each equation for è, giving a general formula for all of the solutions: 6. tanè=-1 7. sin(è/2)=1/2 Please show step by step on how to solve these. Im not sure on how to do them. Thank you for your help!
*March 7, 2012*

**trig**

please help me with some questions I skipped on a review for our test coming up? solve 5-7 on the interval 0 greater than or equal to x less than or equal to 2pi. 5. sin x=sqrt3/2 6. cos x=-1/2 7. tan x=0 ---------------- 14. what is the exact value of tan[arcsin(.43...
*February 22, 2012*

**Trig**

what is the amplitude, period, phase shift, and vertical shift of each equation? 1. y= A cos(B(x-3))+4 2. y=-2sin(2piX/3) 3. y=4cos(3pi(x+3)) 4. y= -3cos(2(x-pi/4))+0.4 thank you so much!
*February 16, 2012*

**trig**

how does that tell how the graph of the function is related to a basic trigonometric graph?
*February 10, 2012*

**trig**

thank you!
*February 10, 2012*

**trig**

I dont understand this. can you please tell how you got each answer? describe how the graph of each function is related to a basic trigonometric graph. 1. y= 1/2cos x 2. y= 2cos x+1 3. y= sin x-4 4. y= sin(x-4) 5. y= sin(3x) 6. y= cos(1/2x) 7. y= -cos x 8. y= -cos x+2 9. y= -...
*February 10, 2012*

**trig**

thank you!
*February 3, 2012*

**trig**

What is the domain, range, and period of y= sin x + 1 What is the domain, range, and period of y= -cos x Can someone please help?
*February 3, 2012*

**Trig**

can you please simplify these in faction form? (pi/3) +1=? (2pi/3) +1=? (3pi/4) +1=? (5pi/4) +1=? (5pi/3) +1=? thank you so much!
*February 3, 2012*

**Trig**

a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC? angle A=60, angle B=30, angle C=90 the triangle has a height of 10
*February 3, 2012*

**Trig**

the line is going from the center of angle C to between AB. Its cutting the triangle down unevenly. sorry its hard to explain. I wish i had the picture for you
*February 1, 2012*

**Trig**

Its a 30-60-90 triangle there's a line in the center that= 10 a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC?
*February 1, 2012*

**Trig**

thanks! :)
*February 1, 2012*

**Trig**

angle b=25 degrees, angle c=90 AB= 25 a. Find the length of side b to two decimal places. b. Find the length of side a to two decimal places in three different ways.
*February 1, 2012*

**Trig**

I figured it out. :) the answer is supposed to be positive because sin is in the second quadrant. :)
*February 1, 2012*

**Trig **

Sarah used her calculator to find sin125 degrees . She wrote down sin125 degrees = -.57. How could Sarah recognize that her answer is incorrect?
*February 1, 2012*

**Trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point. I have 3 other problems like this and i have no clue how to do them. can someone help please?
*January 28, 2012*

**trig**

What is cos(11pi/3)? Explain your thinking. What is sin(13pi/4) ? Explain your thinking.
*January 27, 2012*

**trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point
*January 27, 2012*

**trig**

What are the coordinates of the terminal point determined by t=7pi/6 ?
*January 27, 2012*

**5th grade**

Wha are the names of the smaller mountain ranges that make up the Rocky Mountains?
*September 6, 2010*

**algebra**

(-4x+2)(x+5)
*March 23, 2010*

**11th Grade math**

(-4x+2)(x+5)
*January 21, 2010*

**mathh (unit rate)**

i GUESS YALL HAVE NOTHiNG BETTA 2 DO!!!(♥)
*August 22, 2006*

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