Saturday

January 31, 2015

January 31, 2015

Total # Posts: 857

**Chemistry**

Calculate the enthalpy change when 100. g of ice at 0.0 °C is heated to liquid water at 50.0°C. (The heat of fusion for water is 333 J/g.) 1)54.2 kJ 2)33.3 kJ 3)54,220 kJ 4)20.9 kJ
*October 23, 2007*

**math**

Marla begins walking at 3 mi/h toward the library. Her friend meets her at the halfway point and drives her the rest of the way to the library. The distance to the library is 4 miles. How many hours did Marla walk? First, I set up an equation, 3(h+.5)=4h. Then I simpilified it...
*October 23, 2007*

**math**

Fred begins walking toward John house at 3 mi/h. John leaves his house at the same time and walks toward Fred's house on the same path at a rate of 2 mi/h. How long will it be before they meet if the distance between the houses is 4 miles? First, I set up an equation, 3h+...
*October 23, 2007*

**math**

At 10:00 AM, a car leaves a house at a rate of 60 mi/h.At the same time, another car leaves the smae house at a rate of 50 mi/h in the opposite direction. At what time will the cars be 330 miles apart? I tried to make a equation, 50h+60h=330. I divided 330 by 110. so, I got h=...
*October 23, 2007*

**math**

At 10:00 AM, a car leaves a house at a rate of 60 mi/h.At the same time, another car leaves the smae house at a rate of 50 mi/h in the opposite direction. At what time will the cars be 330 miles apart? I tried to make a equation, 50h+60h=330. I divided 330 by 110. so, I got h=...
*October 23, 2007*

**chemistry**

Calculate the enthalpy change when 50. g of ice at -30.0 °C is heated to completely melt to liquid water at 0.0°C. (The heat of fusion for water is 333 J/g.)
*October 23, 2007*

**Calculus**

67. dy/dx = 0 Would it be all the points of the function.
*October 8, 2007*

**Calculus**

55. Find an equation of the tangent line to the graph of f(x) =x^3 - 2x + 1 a) at (2,5); b) at (-1,2); c) at (0,1). I believe the answers are: a) y= (3/2 x) - (3/2) b) No solution c) No solution For each function, find the points on the graph at which the tangent line is ...
*October 8, 2007*

**Maths**

bobpursley have I got the answer right to this sequence question 3n - 1 answer 2,5,8,11,14,
*September 27, 2007*

**Maths**

bobpursley is this the correct answer to the sequences question 3n-1 Answer 2, 5, 8, 11, 14,
*September 27, 2007*

**Maths**

The Full question is Write down the first five terms for these rules a) 2n + 2 b) 3n - 1 c) 10n + 6
*September 27, 2007*

**Maths**

Could somebody help me with this Maths squence 2N + 2, 3N - 1 , 10N + 6
*September 27, 2007*

**English**

Is this puncuated correctly
*September 23, 2007*

**English**

On his way home from school, Tom found a bag on the ground. "Is this yours?" he asked Tara. "No, it's not my bag! I left mine at school. I think it might be Emma's bag, because hers is blue and green." Tom laughed and said, "You may be right, ...
*September 23, 2007*

**English**

Could you Please help me punctuate this paragraph. on his way home from school tom found a bag on the ground is this bag yours he asked tara no its not my bag I left mine at school I think it might be emma's bag because hers is blue and green tom laughed and said you may ...
*September 23, 2007*

**Math, Still Need Help!**

Ok, This is the question: The attendance at a baseball game was 400 people. Student Ticket cost $2 and adult tickets cost were $3. Total Ticket Sales were $1050. How many tickets of each type were sold? This is what I did: 2x+400=1050 -400=-400 ----------- 2x=650 x=325 3y+400=...
*September 22, 2007*

**Math**

Ok, I'm really confused. Where did you get 800? I don't really understand. Is it like this: 2(S+A)=400 2S+SA=800 Is this right? If so, what do I do after this?
*September 22, 2007*

**Math**

The attendance at a baseball game was 400 people. Student Ticket cost $2 and adult tickets cost were $3. Total Ticket Sales were $1050. How many tickets of each type were sold? Ok, this is what I did: 2x+400=1050 -400=-400 ----------- 2x=650 x=325 3y+400=1050 -400=-400...
*September 22, 2007*

**math**

The Rossi family wants to install new tiles on the floor on their kitchen. The tiles they plan to use are 3 in x 3 in squares. The floor space to be covered is shown in the diagram below with measurements given in feet. How many square tiles will the Rossi family need to cover...
*September 10, 2007*

**Math (Sorry, Forgot to add Part B)**

For Part A: I multiplied 2*3*2= 12 feet Then I multiplied 10*8*2=160 feet Then I divided 35000 by 13 and got 2692.3, then I rounded it to 2, 692. Is this right? Part B: I really don't understand this one. I tried but I just can't get the answer.
*September 5, 2007*

**Math (Sorry, Forgot to add Part B)**

The Pleasant Valley Library is moving to a larger building. To get ready for the move, the staff is packing all of the books into boxes. The library owns 35,000 books. On average, each book measures 8 inches by 10 inches by 2 inches. Each box measures 2 feet by 2.5 feet by 1.5...
*September 5, 2007*

**Econ Help**

Please help! Trying to study for exam! An article in the New York Times (Oct. 18, 1990) described a successful marketing campaign by the French champagne industry. The article also noted that “many executives felt giddy about the stratospheric champagne prices. But they ...
*September 4, 2007*

**Econ Help**

Trying to study for test, don't understand. (3) Suppose that the slope of a curve showing the relationship between the number of burglaries per month (on the vertical axis) and the number of police officers (on the horizontal axis) is –0.60. a. Compute the change in ...
*September 3, 2007*

**Microecon help**

Having trouble with this question on study guide. Please Help! (1) An article in the New York Times (Oct. 18, 1990) described a successful marketing campaign by the French champagne industry. The article also noted that “many executives felt giddy about the stratospheric ...
*September 3, 2007*

**Computer (Excel)**

This is my assignment (actually a quiz) You work at an accounting firm and you need to design a spreadsheet for a business customer's income and expenses. The business is divided into four departments: Sales, Marketing, Development, and Executive. Each dept. keeps track of...
*June 21, 2007*

**Economics**

In the Monetary policy transmission mechanism, explain what could go wrong between the following points 1. Change in the monetary policy and Change in the money supply 2. Change in the money supply and Change in the aggregate demand curve Change in the aggregate demand curve ...
*June 12, 2007*

**Economics**

In the Monetary policy transmission mechanism, explain what could go wrong between the following points
*June 12, 2007*

**Palm beach state college**

7/63
*May 6, 2007*

**Math**

This problem is really confusing, I have been trying and I can't get the answer, can you help me? An Afternoon event was a race through the park. The race started at the point with the coordinates of (2,3). The first turn was at (2,6), the second turn was (6,6) and the ...
*May 6, 2007*

**UNSCRAMBLE 33 letters to make 9 words**

kslilokosloitjebnsjiklecow
*April 16, 2007*

**Math**

Hi, I really need help on this question, I'm stuck. Lake View Middle School is having elections for Class President. Shawn has received a certain amount of votes. April has 6 more votes than Shawn, and David has 6 times as many votes as April. Michael received 1/2 the ...
*April 14, 2007*

**Psycology**

What makes a stressor worse? repetition, repulsiveness, pressure, or exhaustion
*March 20, 2007*

**Calc Help**

Find two functions that this could be the derivative of: y'=4x+7 I have one: y=2x^2 + 7x I cant think of another one!! add a constant. Remember that you can add an arbitrary constant to any integral. The derivative will be the same.
*March 7, 2007*

**Calc Limits**

lim (1+x)^1/x. Give an exact answer. x->0 This reads: The limits as x approaches zero is (1 plus x) to the 1 divided by x. The log of each term is (1/x) ln (1 + x) = ln (1+x)/x Using L'Hopital's rule for the limit of f(x)/g(x), the limit if the log is lim f'/g&#...
*February 16, 2007*

**Calc Help**

A manufacturer's revuenve in dollars is given by R(x)=1500x-0.02x^2 where x is number of units sold. Find the marginal revenue function. Use the derivative to estimate the revenue gained from selling the 35th unit. The marginal revenue function is the derivative, dR/dx = ...
*February 16, 2007*

**Calc Help**

Find the derivative. Express answer in radical notation with no negative exponents. s=4(sqroot t)+(3/t)+2t^5 This reads (4 times the square root of t) plus (3 divided by t) plus 2t to the 5th. Differentiate it one term at a time, using the rule: d/dt(t^n) = n*t^(n-1) s(x) = 4 ...
*February 16, 2007*

**Calc Help**

Find the derivative. Express answer in exponential notation without any negative exponents. y= 1/(sqroot5x+2)^3 This reads: 1 divided by the square root of (5x+2) to the third
*February 16, 2007*

**diversity**

This is a group with distinct national origins or cultural patterns. For example, Norwegian Americans belong to this type of group. Thank you for using the Jiskha Homework Help Forum. Do you mean "ethnic groups?"
*February 7, 2007*

**Science**

What type of energy always stays the same? There are chemical, electric, magnetic, gravitational, nuclear, and thermal (kinetic). All can be changed for the other. I can not think of an exception. Your teacher must have something specific in mind, I have no idea.
*February 5, 2007*

**spelling**

brother:mother::fly:
*January 16, 2007*

**english**

brother:mother::fly:
*January 16, 2007*

**english help!!?!?**

Mom smiles sweet as cold cash at each salesman in the carpet & dapery store where they offer my sister & me white mints fat as mushrooms while we walk up and down the aisles trying to make earth match the sky. What does the narrator mean when she says “make earth match ...
*December 26, 2006*

**Physics**

A roulette wheel with a 1.0m radius reaches a maximum angular speed of 18 rad/s before it stops 35 revolutions ( 220 rad ) after attaining the maximum speed. How long did it take the wheel to stop? Unless you mean the 35 revs occur after max speed, it cannot be solved. The ...
*December 19, 2006*

**Chemistry**

0.74
*November 26, 2006*

**physics**

Must use meters, not kilometers.
*November 12, 2006*

**English question!**

what is historical context ? how do I Identify and describe details that develop the historical context of a story? Hi Robert, 'Historical Context' basically means, at what period in history the story is taking place. To identify and describe details that develop the ...
*November 10, 2006*

**English**

What is the name of the island in the latest Lemony Snicket book "The End" I'm sure it tells you in the book. Have you read it?? ??
*November 9, 2006*

**English+ check!!!**

from informal to formal: Informal: After work, Rebecca hung with her friends for a bit. Nothing much happening. She should of headed off to the store for dinner, but instead she grabbed some junk food. Killed some time by checking out a softball game in the park. formal: After...
*November 9, 2006*

**chemistry**

im getting that the moles C = .347 moles H = .436 moles O = 0.025 and getting a formula of C14H17O However, i looked it up on wiki and saw that the formula for ibuprofen is in fact i C13H18O2. the C/H discrepancy is understandable, but the O2 to O is not. Could i have missed ...
*October 17, 2006*

**Simplifly variable Expressions**

by dividing 5 into 5 and it equals 1 with a square root of 2 and that equals 1.
*September 20, 2006*

**Simplifly variable Expressions**

54n
*September 20, 2006*

**WHAT IS THE PROBLEM?**

Is there anyone kind enough to provide any suggestions? I see that others have been responded to at least once and not this one. What is the problem? And if its a matter of not putting a particular subject, than perhaps it should also be addressed to others who do not do it ...
*September 5, 2006*

**Any suggestions? [No subject]**

I have a team project due on Saturday. I need to know what how to approach my first appearance. For example, indicate times I am avaliable and mode of communication (not a short bio because I have done that already). What else should I inform the group of me or the project ...
*September 4, 2006*

**problem!**

Atherosclerosis is a condition also called "hardening of the arteries", resulting in reduced elasticity of the arteries. Identify two circulatory problems that might arise from this effect on the vessels. I have no idea Atherosclerosis causes two main problems. First...
*August 5, 2006*

**history native american indians**

what kind of discrimination has the native american indians dealt with? for example Environmental justice issues Affirmative action Redlining Double jeopardy Institutional discrimination Reverse discrimination I would like to know where I would be able to find this information...
*July 26, 2006*

**Statistics**

I'm looking for some help with my statistics homework...I'm good with the basics, but I really bombed on my last class anyone??? To help you, we need to know specifically what problems you have. Please repost with specific problems. I hope this helps a little. Thanks ...
*July 13, 2006*

**Pre Calculas**

Complete the identity sin theta / cos theta + cos theta / sin theta = ? Do you mean (sin theta/cos theta) + (cos theta/sin theta) ? That would equal tan x + cot x = tan x + (1/tan x) = (tan^2 x + 1)/ tan x I don't see any way to further simplify it. 1/(cosx)(sinx) or sin^...
*June 10, 2006*

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