Questions Asked on
January 9, 2010

Maths: Partial Differentiation
1) If x = rcos theta and y = r sin theta, show that partial r / partial x = cos theta and find partial theta / partial x. 2) If z = sin theta.sin phi.sin gamma, and z is calculated for the values theta = 30degrees, phi = 45 degrees and gamma = 60degrees,

Chemistry
Is sulfuric acid ionic or covalent?

Trig.
sec^2xcotxcotx=tanx (1/cos)^2 times (1/tan)(1/tan)=tan (1/cos^2) times (2/tan)=tan (2/cos^2tan)times tan=tan(tan) sq. root of (2/cos^2)= sq. root of (tan^2) sq. root of (2i)/cos=tan I'm not sure if I did this right. If I didn't, can you show me the

algebra
Can you help see if I am arriving at the right answers? 1. F(x) =5x^22x F (0), I got o F (1) I got 7 F (2) I got 16 2. 0.4x40 3. 8x(5x+7) =14 My answer: 7/3 4. 19

Managerial Economics
Please check Here gasoline output is mesured in thousands of gallons, fiber output in the thousands of square feet, and crude oil in thousands of barrels. The product's profits per unit output are $.50 per gallon for gasoline and $.75 per square foot for

Math
Give the equation of the line that passes through point (1, 2) and is parallel to the line y + 6x 7 = 0. I have a really have issues trying to figure these out so if I could get a step by step break down on how to solve this it would be great.

Math
Give the equation of a line perpendicular to the line y = 8x + 8 having the yintercept 2 units below the yintercept of the given equation. At what point the two equations cross each other?

chemisty
If 15 grams of copper (11) chloride react with 20 grams of sodium nitrate, how much sodium chloride can be formed? Hint: you will need two stochiometry problems to determine which reactants limit the amount of NaCl produced? How do you figure out the 2

math
what is the greatest common factor for 39 and 57? a)19 b)13 c)7 D)3

Finance
An initial outlay of $10000 resulting in a free cash flow of $2000 at end of year 1, $5000 at end of year 2, and $ 8000 at end of year 3. Determine the internal rate of return to the nearest percent ?

math
To train for a triathlon Cartman swims 125m daily for one week.Each subsequent week he doubles the daily amount until he swims 4km each day for one week. The total distance he has swam is? What is the equation for this,since he doubles every week

Chemistry
A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NaNsubscript3 > 2Na + 3Nsubscript2 The density of nitrogen gas is typically 1.16g/L at room temp. Calculate the number of

PreCal
Simplify e^3ln21

geo
what are the human activities in the innuitian mountains?

English
Hello! Can you recommend me any poem or a short story ( really short) which I can do with my class? ( 19 year olds, learning English as a foreign language)I need to have one prereading activity, one whilereading and one postreading activity. Thank you

Math
{1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 1, 2} I need to find the standard deviation of this set of numbers please help!!!

math
I solved these can you chack them 1. 24 quarts = 6 gallons? 2. 5 cups = 40 oz? 3. 8 cups = 4 pints? 4. 81000 pounds = 4 1/2 tons? 5. 1 quart = 4 cups? 6. 8 gallons = 32 quarts? 7. 32 quarts = 8 gallons? 8. 13 quarts = 3.25 gallons? 9. 24 full ounces = 1.5

Math
If each score in a set of test scores is divided by 10, describe the effect of the division on the mean, median, mode, range, and standard deviation of the set.

English
Can you check the following email for me, please? 1)I am terribly sorry for emailing you your new timetable for the period .. later than I promised you 2)As the 8th December and the 5th January were holidays, you will have to catch up two hours in the

Math
I need to know the standard deviation and how to get it for the following set of numbers. {10, 11, 10, 12, 11, 10, 11, 11, 12, 13, 11, 10, 14}

science
Why does tomato sauce stick to pasta. You have given me a website to use in the past, but I have forgotten it. Thanks and sorry

math
The area of a triangle is 40cm2. if its height is 5cm, what is its base?

social studies
whao were the Yankees from the Civil Wars?

science
you are shopping for cereals. how does estimating density help you find a good buy?

algebra
Helpme solve this please i am really stuck x+3y=8 x=43y

Unversal Coverage
Explain why the lack of universal health care coverage can raise health care costs.

Math story problem
Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

algebra
My answer to the question below is >=22.5 is it correct 0.6x+4

Trigonometry
Given sin x = 4/7 and cos x = negative square root of 33 over 7, find cot x. I think it's square root of 33 over 4!

Socials
First Nations Assignment Fact Chart Plains: Food = Pemmican/Bison/Buffalo Shelter = Tipi Clothing = tunics, leggings, skirts, breechcloths, & moccasins Social Organization = ? Government society = the sun dance was a rite of initation I think I am supposed

math
Who created the leading coefficient test?

Literature
I still havn't figured out where the exposition of The Miracle Worker is. Please helpp! Thanks MC

Socials
First Nations Assignment Fact Chart Plateau: Food = Salmon, plants, berries, edible roots/wild onion, wild lily bulbs, roots of a yellow flowers called balsam root, deer, bison Shelter = pit houses, tents Clothing = moccasins/deer hide, long shirts,

Socials
First Nations Assignment Fact Chart Northwest Coast: Food = shellfish/middens, salmon, birds, early ripening plants foods/salmon berries, huckleberries Shelter = longhouses, Clothing = ? Social Organization = inherited rank and priviledge/ cheifs and

Physics
A 2 kg mass on a horizontal frictionfree air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass

religion
What is the relationship between Buddhism and the natural habitat? How does it help guide the modifications of the environment and shape the perception of nature?

health psychology
where can i find more information on a health psychologist and their duties. i have already tried to google but did not come up with much

Math
A: Solve the following equation: k2 + 4k = 0 A: By factoring B: By using the quadratic formula

Language Arts
Does anyone know a website that tells you other forms of a word? Ex. run  ran, running

math
is 39 a prime or a composite number?

Finance
an initial outlay of $10000 resulting in a free cash flow of $1993 at end of each year for the next 10 years. the internal rate of return?

math
56 is divisible by a)6,8 and 9 b)5,8,9 C)2,4,7 D)none of these

math
42 is divisible by a)5and8 b)2,3,6,7 c)3,5,9 d)none of these

math
42 is divisible by which of the following numbers? A)14 B)8 C)5 D)9

math
what is the greatest common factor of 9,18,and 45? A)5 B)9 C)18 D)45

math
what is the greatest common factor for 12 and 30?

math
46,207 x 125

math
what is the least common multiple for 12 and 30?

math
which of following is not a prime number? A)17 B)23 C)31 D)51

math
which of the following numbers is not divisible by 9? a)81 b)162 c)199 d)1125

English
I need to check my answers. The assignment was to write the appositives and appositive phrases in the following sentences, along with the words they rename or identify. 1. Wilma Rudolph, another champion sprinter, also overcame a disability. *ANSWER*

algebra
I am to solve this system of equations x+3y=8 x=43y I got (2,2), but I am not sure if this is righ, can you help me?

math
Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

math 157
in a subdivision, 67 perecent of the homes have detached garages, 32 perecent have a patio, and 13 percent have both. What is the probability that a house has a patio if you know that it has a detached garage? would it be 32/67?

math 157
in a subdivision, 67 perecent of the homes have detached garages, 32 perecent have a patio, and 13 percent have both. What is the probability that a house has a patio if you know that it has a detached garage? would it be 32/67?

General Education
My question is " "What is the relationship between shortterm goals and longterm goals?" I think that for one to be able to achieve their longterm goals, they need to set shortterm goals and be able to meet them. But is there more to the relationship

English
I need help making sure I rewrote the following sentences correctly while including the appositive or appositive phrase. 1. The Olympic athlete also overcame polio. (Ray Ewry) ANSWER= Ray Ewry, the Olympic athlete also overcame polio. 2. Ewry competed in

math
laurie expects to make $100,000 in 2007. her social security tax rate is 6.20% up to wage base, medicare is 1.45%. how much FICA is laurie expected to pay for the year?

math
I am working on a problem where I am to graph the equation and identify the y intercept the equation is y+x=9 On the graph, I plotted (0,9) and (9,0); I identified the y intercept as (0,9) Is this correct?

french help
can someoneo check these answers to some questions? j'esp¨¨re que je sois accept¨¦ ¨¤ RISD et j'esp¨¨re que je sois capable de payer pour mes cours. RISD est ma premi¨¨re ¨¦cole de choix et c'est aussi tr¨¨s cher, donc j'esp¨¨re que j'irai

algebra
can someone help me with solving this? 5/2x+1/4x=9/4+x

Child Care
You the owner of XYZ Day Care, buy a new van for your business. The van costs $20,000, all of which you borrow from First American Bank. What describes the journal entry for this transaction?

finance
Wheeler Corporation is planning to expand its business and needs $30,000,000. The company believes that a 12year term loan can be negotiated with a bank at an annual rate of 10%. Alternatively, an investment banking firm has indicated that it is willing

algebra
can someone help me with this question it is very hard the question is 4j  3 = 5 the solutions are a)j=1/2 b)j=2 c)j=8 d)j=32 someone please help me on this pretty pretty please

math
A supersoaker water pistol can hold up to 4 litres of water. If each shot uses 11/12 of amount of water of its previous shot, the amount of water fired by a fully loaded supersoaker's first shot is? x/4000ml=11/12 x=3666.7mL why is the answer 333mL?

SocialsMs. Sue
First Nations Assignment Fact Chart Plains: Food = Pemmican/Bison/Buffalo Shelter = Tipi Clothing = tunics, leggings, skirts, breechcloths, & moccasins Social Organization = Patrilineal, matrilineal/would that be matrilinral?, monagomy, semi sedentary?

Precal
let P(x)=2x^4x^3+13^28x24. Use synethetic division to show that x+1 is a factor of P(x) Answer:2x^33x^2+16x24 Then find all real and imaginary roots of P(x)=0.

math 157
A box contains three black balls and two golden balls. A ball is selected at random, it's color is recorded and it is then replaced. A second ball is selected at random, it's color is recorded it is then replaced. The outcome is associated with this type

Pre Cal
An open box is formed from an 80cm by 80cm peice of metal by cutting four identical squares from the corners and folding up the sides. Express the volume of the box in terms of x. Then describe how you could find the maximum possible volume.

math
solve: log base2(log basex(x+6)=1 There's 2 different bases, how do I solve for x?

math
Determine the inverse of f(x)=(x^3)2 Is the inverse the switch of coordinates between x and y or is it 1 over the whole equation?

math/story problem
Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

hcr 210
What conclusions can you draw about similarities and differences in circulation, tracking and security measures for records handling and storage within small, medium, and large facilities?

math
I am supposed to figure out if these are consistent or inconsistant ,but I am arriving at only one point for my answer, telling me this is constant but dependent am I doing something horribly wrong? 8x9y=63 9y8x=63

social studies
Who assisted the Northerners also know as the Yankees soldiers in the fight against the confederate soldiers also called the Southerners from the Civil War?

APEnglish
what do the ''sea'', ''coffin'', doubloon'', and ''moby !@#$%^& mean in the novel Moby !@#$%^& written by melville and suggest that the phantom of life is truly ungraspable?

Science
A parent's chance of passing a rare inherited disease on to a child is 0.15. What is the probability that, in a family of three children, none of the children inherits the disease from the parent? How does that work?

ELA
What should I include in my Dust Bowl Reaserch???????

chemistry
For each of the following unbalanced equations, indicate how many moles of the first product are produced if 0.625 mol of the second product forms. State clearly the mole ratio used for each conversion. CH3CH2OH(l) + O2 > CH3CHO(aq) + CH3CHO(aq) + H2O(l)

Accounting
a net loss of $50,000 in 2009 and net income of $250,000 in 2010. The increase in net income of $300,000 can be stated as 200% increase cannot be stated as a percentage can be stated as 0% can be stated as 100% increase

Language Arts
What is the pronunciation of unsavory?

Business
What is interpersonal communication habits or behaviors, example list?? how can it get involve when one is communicating with another person.

English
I need to check my answers. The assignment was to write the appositives and appositive phrases in the following sentences, along with the words they rename or identify. Are these Correct? 3. A basketball star at age 13, she was known for her speed.

Physics
A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to

English
I need help making sure I rewrote the following sentences correctly while including the appositive or appositive phrase. I made corrections. Are they right? 1. The Olympic athlete also overcame polio. (Ray Ewry) ANSWER= Ray Ewry, the Olympic athlete, also

English
Wait so is it: 5. Four years later, Rudolf achieved her greatest personal triumph, three gold medals in a single Olympics. *ANSWER* AP=three gold medals in a single Olympics WM=triumph

health care
What is the affect of health care costs for the individual consumer and the employer?

Pre Cal
Find the manitude of each vetcor, and write each vector as the sum of the unit vectors. Choose either one (2,6) or (4,5) Thank you

math
A ski resort offers a weekend ski package for $80 per person or $6000 for a group of 80 people. Which would be the less expensive option for a group of 80?

math 115
i am trying to find this answer there are 3 questions. 1. micheal kept the following records of her phone bills for 12 months: $47, $42, $56, $46, $63, $49, $47, $40, $58, $63, $51, $62 Find the mean and median of michael's monthly phone bills. A) mean:

geometry
how do i find the indicated meassure for a parralelogram?

Algebra 2
3x+40

Trig
triangle with side lengths 172m, 155m, and 155m. calculate the area.

alg.
1. You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. a) Write an inequality that demonstrates how much money you will be willing to spend on the project. b) Suppose you want to cover the backyard with

spain
is leon a country or city in spain???

literary
what do we mean with the turning point in a story

Biology
1) Why is it appropriate to call the endomembrane system a "system?" 2) The selective permeability of biological membranes is dependent on _______________. 3) Why is it unusual for a phosphlipid molecule to flip from one face of the membrane to the other?

com/150
The antecedent in the following sentence is Doctors: Doctors should schedule more time for patients so they do not spend so much time in the waiting room.

math
At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product

3rd grade
wht is 500 @4

science
what is "Position" in Science?

SCIENCE
Can Someone Give Me Extra Questions For The Chapters Transportation In Plants AND Reproduction In Plants And Animals

english
Wat's The Meaning Of 'Cohesive' ??

social studies
explain a stupa's structure briefly

statistics
Question 1 Question 1 1. Question 1 text The head of the History Department wants to compare the averages of 2 different instructorâ€™s to see if they differ. A sample of 15 students in Instructor Aâ€™s class has average of 74 with a standard

debating
wedlock is padlock

Social Studies
I have a poject on putting a patent on a invention. I have a invention and its a shoe ferris whel but I need a catchy title and a slogan. I NEED HELP!!!!!

Trig
4tan^2u1=tan^2u 3tan^2u=1 tan^2u=1/3 sq. root of (tan^2u)=sq. root of (1/3) tanu=sq. root of (3)/3 tanu=sq. root of 1 Did I do this one right? If not, could you please show me the correct method?? Thanks!