Wednesday
May 4, 2016

# Posts by maria

Total # Posts: 1,808

Calculus 1
Find the formula for a function of the form y=bxe^(-ax) with a local maximum at (4,12)...
April 13, 2016

algebra
a 38 inch piece of steels is cut into three pieces so that the second piece is twice as long as the first piece, and the third piece is three inches more than four times the length of the first piece. find the lengths of pieces.
April 4, 2016

Basic Finance
Suppose we observe the following rates: 1R2= 8%, 1R2= 10%. If the unbiased expectations theory of the term structure of interest rates holds, what is the 1-year interest rate expected one year from now, E(2r1)?
April 1, 2016

Math
A hockey team can win, lose, or tie a match. It gets 2 points for a win, 0 points for a loss, and 1 point for a tie. It has lost 10 out of the 28 matches it has played so far, and it has 30 points. Which two equations can be used to find its number of wins, w, and its number ...
March 31, 2016

chemistry
For the following reaction at equilibrium, which change would shift the position of equilibrium toward forming more products? (Circle your answer(s) as there may be more than one.) 2NOBr(g) 2NO(g) + Br2(g), ∆Hºrxn = +30 kJ/mol A) Decrease the total pressure by ...
March 30, 2016

algebra
A large swimming pool has a perimeter of 1,028 meters, this rectangular-shaped pool is 40 meters longer than 5 times its width. Find its dimensions. width m length m
March 25, 2016

Art
WriteTeacher
March 24, 2016

Art
What did the Vogel's artworks communicate about their historical interests? They collected works that were culturally popular. They collected works that depicted revolutions. They collected works that depicted the history of cities. ( my choice ) They collected works that ...
March 24, 2016

physics
Which is the vector quantity that describes the shortest path between two points?
March 22, 2016

Math
Beta has a rope 23m long. She cutis off 1/5 of it.How long are the two pieces
March 21, 2016

4. Which one of the following philosophies makes every employee a quality inspector for his or her own work? A. Six sigma C. Kaizen B. Quality at the source D. TQM 5. According to Maslow’s theory, what happens when a need is satisfied? A. The need disappears and won’...
March 19, 2016

Answer D. The theory refers to control being achieved by manipulating the behaviour good or bad
March 19, 2016

10. Which statement is most accurate regarding reinforcement theory? A. Attainable goals lead to high levels of motivation under certain conditions. B. Perceptions of unfairness are viewed as punishments and reduce productivity. C. Management style is based on the extent to ...
March 19, 2016

I have 5 more red pins than yellow pins and 8 more yellow pins than green pins. The green pins are 3 centimeters shorter than the red and yellow pins. I have 18 green pins. How many red, yellow and green pins do I have
March 16, 2016

Analytical Chem
Equilibrium involving SO2(g), O2(g) & SO3(g) is important in sulfuric acid production. When a 0.0200 mol sample of SO3 is introduced into an evacuated 1.52 L vessel at 900 K, 0.0142 mol, SO3 is found to be present at equilibrium. What is the value of Kp for the dissociation of...
March 16, 2016

Language
yes 1 is B
March 14, 2016

life orientation
Identity three courses or study field associated with science and give 2 reasons for each
March 6, 2016

chemistry
3.05 g of hydrated copper sulphate produces 1.94g of anhydrous salt.assuming complete removal of all water of crystallization,determine the formula of hydrated copper sulfate
March 1, 2016

History
Okay thanks
February 28, 2016

History
Which factor contributed to growing conflict over slavery from the 1820s through the 1850s? falling crop prices rapid industrialization rising tariff rates territorial expansion** If someone could please help me out a little. I'm pretty confused and this is my educated ...
February 28, 2016

Maths
Thank you for answering, it really helped :) Just wondering when I am supposed to know to put x ¸ R? Thanks
February 26, 2016

Maths
Sorry, the symbol did not come out properly when I posted the question. The answer to the question is x followed by an equals sign with a line going through it then 1.
February 26, 2016

Maths
I need to solve this inequality: 3(x-1)^2 > 0 The answer is x ‚ 1, but I don't understand why the answer is not allowed to be equal to 1? Thanks :)
February 26, 2016

COLLEGE
-4 TO THE SECOND POWER + 5 =
February 17, 2016

chemistry
Calculate the energy (in kJ) required to heat 25 g of liquid water from 25oC to 100.oC and change it to steam at 100oC. The specific heat capacity of liquid water is 4.18 J/goC, and the molar heat of vaporization of water is 40.6 kJ/mol.
February 17, 2016

Math
An unknown radioactive substance has a half-life of 124 years. How long will it take a 67 grams sample to degrade to 18 grams?
February 17, 2016

College
-42-@ -4second power + 5 =
February 16, 2016

Geography
It is actually the first second, and third not the last, thanks anyway.
February 10, 2016

Geography
It was a typo, sorry.
February 10, 2016

Geography
*East Asia
February 10, 2016

Geography
February 10, 2016

Geography
which question would best help you analyze the population density of north korea? You have to choose 3 correct answers. How many square miles does East Asia covers? <--- Which region of North Korea has the best geography for farming? What is the population of North Korea&#...
February 10, 2016

Chemistry
Calculate the concentration of H+ ions of an aqueous solution of nitrous acid ( HNO2) to 0.02 mol/L knowing that the degree of ionization of acid is 3%
January 20, 2016

Physics
A 40kg mass hangs from two cables. One cable is at a 25 degree angle. The other cable is horizontally attatched to the mass. Find the tension for each cable
January 14, 2016

Math
George bought some CDs at his local store. He paid \$15.95 for each CD. Nora bout the same number of CDs from a store online. She paid \$13.95 for each CD, but had to pay \$8 for shipping. In the end, both George and Nora spent the exact same amount of money buying their CDs! How...
January 13, 2016

math
9:21 :) Have a good day! Happy New year!
January 12, 2016

English
What literary device is most strongly represented in the following line from “Beowulf?” “Follower and the strongest of the Geats” A. Alliteration B. Hyperbole C. Kenning D. Caesura
January 12, 2016

PHYSICS
No, it cannot.
January 12, 2016

Pre Calc
Solve 0=e^3x-9e^2x+20e^x
December 18, 2015

physics
A team of dogs drags a 81.2 kg sled 3.12 km over a horizontal surface at a constant speed.The coefficient of friction between the sled and the snow is 0.172. The acceleration of gravity is 9.8 m/s^2 Find the work done by the dogs. Answer in units of kJ.
December 9, 2015

Algebra
A rectangular yard measuring 25ft by 35ft is bordered (and surrounded) by a fence. Inside, a walk that is 2ft wide goes all the way along the fence. Find the area of this walk. Be sure to include the correct unit in your answer.
December 8, 2015

Mahiga
a sample of 0.5g gaseous alkane occupies a volume of 200cm3 at STP,find molar Mass
December 7, 2015

physics
A 48-kg girl stands on a 8-kg wagon holding two 19.5-kg weights. She throws the weights horizontally off the back of the wagon at a speed of 9.0 m/s relative to herself. - Assuming that the wagon was at rest initially, what is the speed of the girl after she throws both ...
December 5, 2015

The sum of twenty one and five times a number f is 61 total
December 2, 2015

Chemistry
112.00g of nitrogen gas is reacted with an excess or abundant amount of oxygen gas. The single product, a gas, is determined to have a mass of 431.92 g. Additional experiments showed that the product consisted of 2.0 moles. a) how many grams of oxygen reacted? b) what percent ...
December 2, 2015

social studies
What is social studies?social studies is when you learn about your history and they tell you what happen back then when a lot of us wasn't born and then they tell you to do your warm up.
November 30, 2015

math
What is temperature when you do math. In seventh grade math is hard and I don't understand what my teachers tell me they say that it is easy but i don't think it is i need a lot of help during math it used to be my favorite subject but now its not
November 30, 2015

Solving ratio problems
Write three equivalent ratios for each? a). 2 : 1 = b). 32 : 4 = c). 27 : 15 = d) 10/3 =
November 29, 2015

science
A person drive an automobile with a mass of 450 kilograms at a velocity of 26 meters per second. The driver accelerates to a velocity of 30 meters per second. The difference in the automobile's kinetic energy is how many joules?
November 18, 2015

Algebra 2
Can someone help me with this equation please? The directions are: Write an equation for the line in point/slope form and slope/intercept form that has the given condition. And the problem is: x-intercept = 6 and y-intercept = -8 I'm confused though I thought you needed ...
November 16, 2015

Maths
Show that (x + 1)(x – 3)(x – 4) = x3 – 6x2 + 5x + 12 I'm so sorry but I can't show any working for this as I don't have a clue how to factorise when there are no common letters and numbers? Thanks!
November 12, 2015

physics
It continues to fly along the same horizontal arc but increases its speed at the rate of 1.41 m/s.Find the magnitude of acceleration under these new conditions. Answer in units of m/s
November 11, 2015

math
A group of people were asked if they had run a red light in the last year. 325 responded "yes", and 294 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year.
November 8, 2015

Math
Claudia is celebrating her birthday 18th. A year have 12 months. About haw many months lived Claudia in 18 years?.
November 8, 2015

1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...
November 5, 2015

Science
1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...
November 5, 2015

Maths
Sketch the curve with equation y = (x -1)³ - 4(x - 1) It's not really the sketching which is the problem but more working out where the graph crosses the x-axis and y-axis? I can see that it crosses the x-axis at 1 but am clueless as to the other two parts at which it...
October 30, 2015

alegbra
How long will it take for an investment to triple in value if it earns 11.75% compounded continuously?
October 28, 2015

savannah tech
Jessica need 74,000 in 6 years to buy a car how much she need to save every month she get 6% interest so how much without the interest
October 25, 2015

English
How to do the Calypso (from th odyssey book) GN page
October 24, 2015

Math
a pet store has 4 dogs for sale. they have three times as many fish for sale, twice as many birds for sale, and half as many cats for sale. How many total animals are for sale?
October 22, 2015

math
Factoring Algebra expression using the Distributive Property and factor out 3 3w + 18 3 x 6= 3w 3 (9+ 9) 3x 6= 18
October 21, 2015

Algebra
-4(-3x+w)+6(-6w+2x)
October 14, 2015

math
i need help please...what is 5,602 minus 2,344 estimated
October 11, 2015

1) How many grams of CH4 (MM = 16.043) are needed to react with 50.0g of CL2 (MM=70.91)? 2) What is the molarity of a solution prepared by dissolving 20.0 g of methanol, CH3OH, oara sufficient water to prepare 500 mL of solution? Show calculations
October 8, 2015

bio statistics question!
Does P(x) = x/5, where x can take values of 0, 1, 2, 3, describe a probability distribution? Would the answer be no because when x is 1, 2, or 3 the values become 0.2, 0.4, and 0.6. But in probability distribution the values have to be between 0 and 1?
October 5, 2015

Chemistry
With relation to Avogadro's Constant: How many hydrogen ions are present in 3 moles of dilute sulphuric acid? As sulphuric acid is H2SO4, I'm not sure whether the answer is: 2 x 6 x 10(23) = 1.2 x 10(24) OR 6 x 6 x 10(23) = 3.6 x 10(24) Thank you!
October 4, 2015

math
bret divided 3 1/2 by a number and got 4 1/2.what number did he divide by?
October 1, 2015

math
The weight of box A is 4/5 of box B. If box B is placed on one side of a balance scale, it is balanced by box A and a 4/5 pound weight. How much does box B weigh?
September 30, 2015

Math
balace scale, it is balance by box a and a 4/5 pound weight. How much does box b weight .8 (12.8oz)1/5 B
September 30, 2015

statistics
WITH A SCIENTIFIC CALCULATOR JUST ENTER THE BELOW NUMBERS: 9!=362,880 OR MULTIPLY: 9*8*7*6*5*4*3*2*1=362,880 The probability is 1/362,889
September 29, 2015

Math 1 Algebra
What is 2p+4x=8 solve for x?
September 25, 2015

math homework
9. Jonathan and his band want to record and sell CDs. The recording studio charges an initial set-up fee of \$250, and it charges \$6.00 to burn each CD. a. Define the variables in this situation: • Let ____ = __________________________ • Let ____ = ...
September 23, 2015

Economics
Assume that the manufacturing of plastic (PVC) windows is a perfectly competitive industry. The market demand for plastic windows is described by a linear demand function: Q = (6000 -50P)/9. There are 50 manufacturers of plastic windows. Each manufacturer has the same ...
September 22, 2015

algebra
write a word phrase for the algebraic expression d+2
September 21, 2015

management
Quality at the source
September 19, 2015

math
Which expression represents the largest number? A. 40.1 3 1026 B. 4.1 3 1027 C. 0.411 3 1026 D. 0.04001 3 1025
September 17, 2015

Ap world history
D. The Development of A Quickly Maturing Rice
September 16, 2015

Science
Hoy can i name the entire physical universe?
September 15, 2015

math
The number of my hundreds plus the number of y thousands is 3.the number of my tens is 7 times the number of my hundreds.the number of my ones in 3 times the number of my thousands.all my digits are different.What number am i?
September 12, 2015

math
5y-3/5=4/5
September 7, 2015

spanish
Go back to the lesson and read. I'm doing the test and it's pretty simple just saying. You probably didn't even read the lesson.
September 7, 2015

Math
The concrete for a sidewalk is being poured outside the perimeter of a new subdivision, which is a 280 ft. by 720 ft. rectangle. The building code requires that the sidewalk be 5 feet wide and 8 inches deep. How many cubic yards of concrete will need to be poured? math: ...
August 29, 2015

NOVEL
What does the word mimetic tell us about the difference between novels and most of the literature of the 1800s? A. Novels were unique in trying to imitate real life. B. The authors were new and unknown. C. Novels presented common things in new ways. D. Novels present fantasy ...
August 27, 2015

algebra
what is -4^4 thank you!
August 26, 2015

HELPPPP! ELECTRONICS
I think its C
August 26, 2015

i need help with this one
August 25, 2015

algebra
I think it is: (-5)(-5)(-5)
August 18, 2015

algebra
write the following using exponents: -5-5-5
August 18, 2015

math
132 to 89
August 17, 2015

physics
Two blocks of masses is m and 2m are held in the equilibrium on a frictionless incline. In terms of m and x, find the magnitude of the tension t1 in the upper cord and the magnitude of the tension t2 in the lower cord connecting two blocks.
August 11, 2015

Statistics
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p<.05?
July 27, 2015

Personal Finance
Assume that you are 23 years old and that you place \$3,000 year-end deposits each year into a stock index fund that earns an average of 9.5% per year for the next 17 years. how much money will be in the account at the end of 17 years.
July 17, 2015

Chemistry
A student collected the following data for a fixed volume of gas: ￼Temperature (C) Pressure (mm of hg) 10 726 20 750 40 800 70 880 100 960 150 ??? Fill in the missing data point. Show all calculations leading to an answer.
July 13, 2015

vacunero sto. domingo
a 50 kg wagon is at rest on a rough surface.The coefficient of sliding friction is 0.85.How much force is needed to start moving the wagon.
July 2, 2015

Math
thanks!
May 30, 2015

Math
Find the 100th term in the sequence 77, 71, 65, 59 How do you go about doing this question without the need to list them all out?
May 30, 2015

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