Tuesday
November 25, 2014

Posts by LaLa


Total # Posts: 316

calc 3
1. Evaluate the given integral by making an appropriate change of variables, where R is the region in the first quadrant bounded by the ellipse 36x^2+25y^2=1. L= double integral R (4sin(144x^2+100y^2) dA. 2. Use the given transformation to evaluate the given integral, where R ...
November 4, 2014

chemistry
Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.
October 26, 2014

college algebra
The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature, °F af 40 760 60 ...
October 22, 2014

college algebra
A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln is shown for various times (in minutes) in the following table. Time(min) Temperature (F) 15 2200...
October 22, 2014

Physics
A square loop of wire of side 3.0 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 37degree with the plane of the loop. What is the magnitude of the torque on the loop? What is the net magnetic force on the loop?
October 13, 2014

Physics
a singly charged ion of uknown mass moves in a circle of radius 12.5 cm in a magnetic field of 1.7 t. the ion was accelerated through qa potential difference of 5.7 kv before it entered the magnetic field. what is the mass of the ion
October 13, 2014

Math
Determine if correct or incorrect and justify yourself. n^3 = O(n^2 + n^3) The O is the big Oh notation.
September 24, 2014

4th grade math
If jill climbed 100 feet more, how many feet above sea level would she be?
August 18, 2014

Economic
capital rationing assumes?
July 3, 2014

Economic
a 20 year bond pays on a face value of $1,000. If similar bonds are currently yielding 9%. What is the Market value of the bond?
July 3, 2014

Economic
Suppose a firm has a constant marginal cost of$10 the current price of the product is $25, and at that price, it is estimated that the price elasticity of demand is -3.0. Is the firm charging the optimal price for the product? Demonstrate how you know.
June 19, 2014

math
20. Which of the following rectangles is similar to a rectangle that measures 13 units by 25 units?
June 2, 2014

chem
1) how many molecules are present in 1.5 moles of NaCl? 2) how many atoms of chlorine are in 19.0 grams of MgCl2?
May 29, 2014

Help Mrs.Sue LA
18.When she is shy and doesnt want the teacher to pick relates to the main idea because it shows that when the she is interviewing the teacher she figures out she can do it and becomes confident. 19.? Help please.
May 21, 2014

English II
That day I was so worried that I
March 26, 2014

chemistry
If we have a concentration of H+ at 5 x 10-2 mol/L, what is the pH value? A. -1.30 B. 0 C. 1.3 D. 2.6
February 13, 2014

Math
How would you solve 4[7^(x-2)] = 8
January 23, 2014

Chemistry
118.2
January 19, 2014

English
Help please!!!
January 12, 2014

English
What does this quote mean? “Stars got tangled in her hair whenever she played in the sky.”
January 12, 2014

Physics
two hundred fifty grams of iron is heated from 27 degree Celsius to 300 degree Celsius . how much ice can be melted and raised to a temperature of 27 degree Celsius by hot iron?
November 17, 2013

Physics
An electric heater warms a large 0 degree Celsius block of ice at the rate of 200J/s . calculate the mass of the ice that melts in 10 minutes
November 17, 2013

algebra
A car travels down the highway at speeds between 50 miles per hour and 65 miles per hour. If the car travels for 4 hours, write an expression that represents the distance, d, the car has travelled.
November 1, 2013

Chemistry
Oh, thank you!
October 28, 2013

Chemistry
What is the electro-negativity of NO ? (Nitric oxide)
October 28, 2013

Geometry
Use the Pythagorean Theorem to find the height / bases in each triangle. Then apply formula for area - b(h)/2
September 30, 2013

Pre-Calculus
C(x) = 14 ( 150) + 6 (230-150) + 3x
September 30, 2013

Math
A spherical balloon is being inflated. Estimate the rate at which its surface area is changing with respect to the radius when the radius measures 20 cm.
September 22, 2013

Math
How do you factor 2a^2 - 1 ?
June 4, 2013

Math
APPLE + ORANGE
May 13, 2013

Math
Find a polynomial whose zeroes are double the zeroes of P(x)=x^3-7x^2-5x+2.
March 10, 2013

Financial Mgmt.
Nachman Industries just paid a dividend of D0 = $1.75. Analysts expect the company's dividend to grow by 30% this year, by 10% in Year 2, and at a constant rate of 5% in Year 3 and thereafter. The required return on this low-risk stock is 9.00%. What is the best estimate ...
March 5, 2013

chemistry
how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in 250ml volume.
January 29, 2013

chem
When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!
January 16, 2013

Economics
how did the wizard of oz(the movie) relate to the social and economic texture of america?
January 10, 2013

Science Help
It is a mini one, like a toy car.
December 29, 2012

Science Help
Please help , I need to make a solar powered car. Where would I be able to get 3v motors ?
December 29, 2012

Physics
A mountaineer
December 6, 2012

statistics
test the claim that less than 30% of the students in class own a car at the 0.10 significance level.
December 5, 2012

Chem
a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml, the density of the ...
December 5, 2012

math
500
November 1, 2012

English
Cradle!
November 1, 2012

AP Physics B
Use the equation m1u1 + m2u2 = m1v1 + m2v2 (mass 1 x its initial velocity + mass 2 x its initial velocity = mass 1 x its final velocity + mass 2 x its final velocity)
November 1, 2012

5th grade math
1. Find the area 2. Divide it by 4 3. Thats how many tulips!
November 1, 2012

English
Yes, B.
October 30, 2012

math
1.802752386 x 10 ^11
October 30, 2012

math
1 pack = 5 doughnuts ? pack = 2587 2587/5 = 517.4 Round it... 518 packs Hope this helped!
October 30, 2012

Physics
b. First law of motion - All material objects will remain in rest or motion in a straight line unless compelled by an unbalanced force. Its direction is changing = new force.
October 30, 2012

Steve 3 more questions.
8, 2 0, 4 -1, -2 5, -5 ..Please recheck these
October 30, 2012

Steve 3 more questions.
18 a Cinema A - 66/12 = 5.5 Cinema B - 28/5 = 5.6 Cinema A is cheaper. b) you save 10 cents! ( 5.6-5.5)
October 30, 2012

Math
5/13
October 30, 2012

elementary
Is that really me? I hope you liked the gift from me.
October 30, 2012

Physics
You are looking for range. Range = Vh x t Vh = 30 m/s t= ? We know d= 50 m, viv = 0 m/s a=9.8 d=vit + 1/2 at ^2 50=0 + 1/2 9.8 t ^2 50 = 4.9 t^2 t = 3.1 s Range = (30) (3.1) = 95.8 m Hope this helped !
October 30, 2012

Physics
An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
October 29, 2012

Physics
An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
October 29, 2012

English 9
easy going - feather ?
October 29, 2012

science
a piece of metal weighs
October 26, 2012

math
Point A(8, –10) is reflected over the y-axis. Write the coordinates of A'.
October 3, 2012

Economics
Use supply and demand economic theory and diagram to explain why the prices of houses has changed so much over the last 3 years. I just need topics to use to write about
September 16, 2012

Economics
Use supply and demand economic theory and diagram to explain why the prices of houses has changed so much over the last 3 years. I just need topics to use to write about
September 16, 2012

Physics
The fastest sustained runner is the pronghorn antelope, capable of running at 55 min/h for 1/2 mile. How long does it take this antelope to run the. 1/2 mile?
September 11, 2012

Physics
when driving at night at a speed of 80 km/hr, a deer suddenly appeared and frozen in your head light. The distance between your car and the deer was 45 meters at the moment you start to break your car as hard as possible in order to avoid the accident Assume that you could ...
September 1, 2012

algebra
put 1/3 4/6 1/2 5/6 1/6 in order
July 2, 2012

management
the american federation of labor was formed under the leadership of who?
June 22, 2012

management
according to -theory, employees compare the inputs and outputs of other employees doing similar jobs. unfavorable comparisons may lead to slacking off on their work or asking a supervisor for either an explanation or a raise.
June 22, 2012

management
regarding management and leadership, which statement is most accurate?
June 22, 2012

Chemistry
suppose you wanted to heat a mug of water 250 ml for room temperature 25c to 100c to make a cup of tea. how much energy (in units of calories and joules) would you need form the microwave?
May 26, 2012

books
thank you! i dont know how to start it. like the first sentence. do i just dive right in or start with something else?
May 23, 2012

books
In the romantic tragedy, William Shakespeare tells the audience, through the two young lovers, Romeo and Juliet, that love can make you do crazy things that you wouldn’t otherwise do.
May 23, 2012

books
Romeo and juliet i need a conclusion for my essay the theme is how love can make you do crazy things. so far my 3 paragraphs conclude of 1 romeo climbing to juliets balcony 2 they get marrried 3 they kill themselves now i just need a conclusion
May 23, 2012

United States History
the least controversial actions of president bush regarding? a. war in iraq b. hurricane katrina c. immigration reform d. economic crisis of 2007-2009 e. "no child left behind" educational program I think the answer is E?
May 5, 2012

Chemistry
1 mol=molar mass in grams 6.022*10^23=1 mol all should cancel out whats left is answer
April 23, 2012

History
How were the issues of the civil war similar to those of the american revolution.
April 9, 2012

History
Was the republican party consistent in its policies from the 1850s-1877?
April 9, 2012

History
civil war ---> triumph of american democracy over european aristocracy. I'm supposed to write a paragraph about this, but I don't understand it.
April 8, 2012

History
What struggle was there between the president and Congress for dominant political power within the federal government from 1850-1868? I know there was the reconstruction problem and how congress basically took over. What else?
April 8, 2012

Pre-Cal
I'm trying to put this parabola in standard form which is: (y-k)^2=4p(x-h) The equation is x=(1/12)(y-2)^2 +6 Here is what i have so far: x=(1/12)(y-2)^2 +6 -6 -6 x-6=(1/12)(y-2)^2 *12 *12 Would it be 12x-6 OR 12x-72? thanks
April 3, 2012

Hi
The interests of the West were satisfied by neither the Jeffersonians nor the Federalists between 1789 and 1815. I'm supposed to write a paragraph about it, but I don't understand what it is asking...
March 27, 2012

History
Why is the War of 1812 called the second war of independence? I have b/c it was fought against the same country and it made the U.S independent and more respected. I need more, help please!
March 27, 2012

history
What caused Jeffersonian Democracy to develop?
March 26, 2012

biology
thanks
March 20, 2012

biology
what is the different between diet and health.
March 20, 2012

abstract algebra
Suppose K = {{2,3,4,5,6,7},{2,5,7,8,12},{1,2,3,5,7,9,13,20}}. Find three upper bounds for K in P(N) and three lower bounds. Does K have a least upper bound? Does K has a greatest lower bound?
February 18, 2012

abstract algebra
Suppose K = {{2,3,4,5,6,7},{2,5,7,8,12},{1,2,3,5,7,9,13,20}}. Find three upper bounds for K in P(N) and three lower bounds. Does K have a least upper bound? Does K has a greatest lower bound?
February 18, 2012

Chemistry Help Please :)
thanks
February 12, 2012

physics
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits another kid 2.1 away square in the back, at a point 0.91 above the ground.
February 10, 2012

physics
a large chunk of ice with mass 15 kg falls from a roof 8 m above the ground . find the kinetic energy of the ice when it reaches the ground
February 6, 2012

Physics
What happens to the internal energy of an ideal gas when it is heated from 0C to 4C? a. increases b. decreases c. change in number of atoms d. increase in volume of substance
January 17, 2012

physics
a. increases b. decreases c. change in number of atoms d. increase in volume of substance
January 17, 2012

physics
What happens to the internal energy of an ideal gas when it is heated from 0C to 4C?
January 17, 2012

Physics
What happens to the internal energy of an ideal gas when it is heated from 0C to 4C?
January 17, 2012

Literacy
17. Scholarly journal articles are written: A. For a general audience B. By lower division college students C. By reporters D. By experts in a subject field
January 17, 2012

Physics
a = F/m = 15N/45kg = 0.33 m/s^2 , vf^2 = vi^2 + 2ad vf^2 = 3^2 + 2(0.33)(11) vf^2 = 16.3 vf = 4m/s is that correct?
January 5, 2012

Physics
A 45kg sled is coasting with constant velocity at 3.0m/s over a patch of smooth and level ice. It enters a very rough section of ice that is 11m long in which the force of friction is 15N. With what speed will the sled emerge from the rough ice?
January 5, 2012

World
Will the world end on december 2012? I dont think it will
January 1, 2012

calculus
what is the domain of f if f(x)=2cos(4x+pie)-1
December 13, 2011

algebra
maybe t divided by 30 and 30 times t...?
December 5, 2011

algebra
maybe t divided by 30 and 30 times t
December 5, 2011

math
20. A scale drawing of a town park has a scale of 5 in : 100 ft. What is the actual length of each foot in the drawing? (1 point)
December 2, 2011

calculus
a boat leaves a dock at 2:00 pm and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 3:00 pm. at what time were the two boats closest together
November 14, 2011

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