Tuesday
February 9, 2016

# Posts by Lala

Total # Posts: 344

chemisty
Gary is carrying out two chemistry experiments. In experiment A he mixes hydrochloric acid with sodium carbonate. In experiment B he mixes nitric acid with copper carbonate. Explain what Gary will need to do in order to test the gas produced in each experiment. I don't ...
January 21, 2016

Math help
A small recording studio that produce its own records is able to press 100 records a day for a profit of \$3.60 per record. If a more expensive process is used, production can be increased, but the profit per record diminishes by 2 cents for each additional record produced. how...
January 12, 2016

Matsci
If the absolute pressure at the bottom of the ocean is 120 kPa, how deep is the water at this point
December 5, 2015

Statistics, Math
For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.37 million dollars. Assuming a population standard deviation gross earnings of 0.52 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling Stones concerts (in ...
December 1, 2015

chem
Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)
September 29, 2015

integrated science
with all other factors equal, if you double the balanced force on an abject of a given mass the acceleration will be?
September 20, 2015

Math sequences
Determine the smallest interger n such that 1+(4/5)+(4/5)^2+...+(4/5)^n>4.9 Please explain ti me about thisquestion. I can'tunderstand it.
August 10, 2015

Science
Omygossh thanks damon!!! :)
June 23, 2015

Science
The rider of a ferris wheel moves at a rate of 0.18 m/s2. If the rider is 5.0 m from the center of the ferris wheel, What is his/her Velocity? Can't figure out if the RADIUS and RATE are the same and Which one is the radius/rate?
June 23, 2015

Math
1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5
April 16, 2015

Science
the energy an object has due to it's motion is called a what?
March 18, 2015

Science
All corret!!!
February 26, 2015

quick question
could you tell me what there asking for ?
February 23, 2015

quick question
what are three programs financed from one payroll tax to which employers and employees contribute at a rate specified by law ?
February 23, 2015

Science
The answer is not B it's D!!!!
February 7, 2015

Math
Find the exact value: cos(pi/16)cos(3pi/16)-sin(pi/16)sin(3pi/16)
January 29, 2015

algebra
A fuel storage tank has one supply pump and two identical outlet pumps. With one outlet pump running, the supply pump can increase the fuel level in the storage tank by 8450 gallons in 30 minutes. With both outlet pumps running, the supply pump can increase the fuel level in ...
November 27, 2014

algebra
A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat___ mph rate of current___ mph
November 27, 2014

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

Language Arts
Are you guys going to Connexus?
October 23, 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

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

English
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

english
did you get this answer?
February 6, 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
November 15, 2012

English
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

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

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 help
did you get the answer for number 14?
October 9, 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

Science
secret
July 6, 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

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