Saturday
April 19, 2014

Posts by tam


Total # Posts: 50

Precalc - Coordinates in 3D - Polar Coords
If you multiply both sides of r=cos(θ) by r you get r2=rcos(θ) which is the same as x2+y2=x or x2−x+1/4+y2=1/4 (x−1/2)2+y2=1/4 a circle with center at (1/2, 0) and radius 1/2 so it is tangent to the y-axis. While you can have r negative in the equation, t...

calculus
Evaluate to four significant digits log x = 5.3027

math
Audrey bought 7 pounds of diced apples and shared them equally among 4 friends. How many pounds of apples did each person receive? Two of the friends put the portions they received together and then gave them to the food pantry. How many pounds of apples did they give to the f...

math
5 2/9 - 3 1/3=?

math
The produce manager receives 5 containers of green beans, each weighing 7 pounds. She divides the total amount of green beans into 3 equal weight portions. What is the weight of the beans in each portion?

Math
Audrey bought 7 pounds of diced apples and shared them equally among 4 friends. How many pounds of apples did each person receive? Two of the friends put the portions they received together and then gave them to the food pantry. How many pounds of apples did they give to the f...

Math
Jessica and her mother return from shopping with 14 packages. They park the car in the parking lot, which is 120 meters away from their house. Then they make several trips to bring the packages into their house. Jessica's mother can carry 3 packages at a time and Jessica c...

Math
Benita has 3 ropes measuring 54 centimeters, 108 centimeters and 189 centimeters. She cuts all of them into equal pieces. The length of each piece is the longest possible length she can cut. What is the length of each piece of cut rope? How many pieces of rope does Benita get?

Math
For every 5 highlighters that Agnes buys, she gets 1 free. If Agnes needs 80 highlighters, what is the least amount she has to buy?

Math
Robert and Damien had the same amount of money. Each day, Robert spent $4 and Damien spent $6. When Damien had $12 left, Robert had 4 times as much money as Damien. How much money did each boy have at first?

MATH
Marit and jennifer had an equal number of crackers. Each day, Marit ate 12 crackers and Jennifer ate 6 more crackers than Marit. When Jennifer had 24 crackers left, Marit had 96 crackers left. How many crackers did each of them have at first?

Math
Sophia buys an eqaul number of oranges and pears for a party. The oranges are bought at a price of 7 for $2 and the pears are bought at a price of 5 for $3. She pays $33 more for the pears than the oranges. How much does Sophia pay in all? How many oranges and pears does she b...

Math
There were 149 angelfish and goldfish in an aquarium. There were twice as many guppies as angelfish. After selling 35 goldfish, there are half as many goldfish as angelfish. How many fish are left in the aquarium?

math
Aaron and Benga have a total of 976 trading cards. Benga has 7 times as many cards as Aaron. How many cards should Benga give Aaron so that Aaron will have 3 times as many cards as Benga?

Math
In a mathematics quiz, 20 problems are given, 5 points are given for each correct answer and 2 points are deducted for each incorrect answer. Ashley scores 51 points. How many correct answers does she have?

Science
What type of informatin to put in a plant cell essay?

Grammar
Hi means what?

windows 7
The __________report lists the webpage you are currently accessing and indicates if they have written cookies. A.safety B. Privacy c. protection d.liability

windows 7
A____ searchs the web for information related to the text you select. A. web archive B.In private browser C. accelerator

chemistry
what is the ionic equation for 2HNO3(aq)+Ba(OH)2(aq)

Fractions
A 161/2ft wire is cut into 8 pieces of equal length how long is each piece

algebra 2
the area of the blanket equals 36x^4-64x^2, write an equation that will help you find the length

business law
at issue in the twenty-first century is the trade-off between the necessity of writers, musicians, artists, and movie studios to profit from their work and the free flow of ides for the public benefit. Move and music industry participants claim that encryption programs are nec...

chemistry
a 0.25-g sample of a liquid was vaporized at 100 degree celcius. The vapor occupied 125 ml under a pressure of 0.96 atm. What is the molecular weight of the liquid?

chemistry
a 0.25-g sample of a liquid was vaporized at 100 degree celcius. the vapor occupied 125ml under a presure of 0.96 atm. what is the molecular weight of the liquid?

geometry
how do 83/100 simplify to 5/6

math
10 in = feet ( give the answer in a fraction)

chemistry
Lab on Determination of copper in brass. I have mass of brass at .1011g. My concentration of diluted solution's unknown is .0037957, My concentration of mg/ml Cu^2+ unknown is 241.2. My professor is asking me to determine the percent of copper. I know that %Cu=mass of Cu/M...

Chemistry
A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 of the 0.020M KMnO4 was needed. Calcul...

chemistry
25.0 cm3 of an acidified solution containing Fe2+ ions was titrated against potassium manganate (VII) solution. 20.0cm3 of 0.050M potassium manganate (VII) was needed. Calculate the concentration of Fe2+ ions in the acidified solution.

physical science
At the bottom of a well one quarter of radius of the earth deep your weight compare to your normal weight would be

physical science
a 180 lb person climbs a ladder to a point which is two times the radius of the earth high. how much does he weigh there?

algebra
factor: 6x^2-13x+6

College Physics
A 3.0 kg black is at reat on a horizontal floor. If you push horizontally on the 3.0 kg block with a force of 12.0 N, it just starts to move. What is the coefficient of static friction?

EDU
I would think that a negative influence could be that it can affect their body image, self esteem etc

Algebra
The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=4,000/200-2x What is the cost to remove 65% of the pollutant? Show all your work. What is the cost to remove 95% of the pollutant? Show all your work. What is the cost to remove 99% of the poll...

Physics need help
A guitar string is struck and found have a frequency of 2048Hz. If both tension and length are doubled, what is the new frequency of the string?

Chemistry
IRON+SULPHUR-IRON 2 IN ROMAN NUMERALS SULPHIDE

algebra
Find the domain of the function f(x)=9-x squared

computers
considering how technology enables people to communicate constantly with each other through mobile phones, instant messaging, video teleconferencing, and e-mail: How often do you gain or exchange information via your computer? In how many ways is this possible? How valuable do...

Business Ethics
Describe the business reasons to limiting monitoring . Also, explain how monitoring causes stress in the workplace.

history
yea

history
is the electric chair apart of the industrial revolution?

acounting
Describe the types of pension plans most often found in governmental entities and the differences between them. Do you expect that most governmental employers sponsor a “single-employer plan” or participate in a public employee retirement system (PERS)

accounting
The City of Katerah maintains its books and records in a manner that facilitates the preparation of the fund financial statements. The city has adopted the 60-day rule for all revenue recognition for which it is appropriate. Prepare all necessary journal entries to record the ...

Pre Algebra
2/3= 0.6666

History
a. Habeas Corpus b. reservations c. utopia d. monopoly e. interchangeable parts

Quanitive Methods
A car rental company has $540,000 to purchase up to 25 new cars of two different models. One model costs $18,000 each and the other model costs $24,000 each. Write a system of linear inequalities to describe the situation. Let x represent the first model and y represent the se...

World History
I need help finding examples of imperialism in today's world? And then explain why is it an example of imperialism.I need to use these examples to write an essay. CAN ANYONE PLEASE GIVE ME SOME IDEAS. PLEASE HELP THANKS ALOT Thank you for using the Jiskha Homework Help For...

World History
I need help finding examples of imperialism in today's world? And then explain why is it an example of imperialism. PLEASE HELP THANKS ALOT Try the following: http://www.google.com/search?hl=en&lr=&as_qdr=all&q=allintitle%3A++%22imperialism+today%22+ Tam, First decide what...

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