Saturday
December 20, 2014

Posts by Maria


Total # Posts: 1,557

Geometry Math
If point M is the center of a sphere with the coordinates (-1,3,2) and point T is a point on the surface of the sphere with the coordinates (0,5,1), what is the radius of the sphere?
June 4, 2012

Geometry Math
Lines y= 2x/3+3&y=5 cut the ring formed by circles (x-3)2+(y-5)2=64 and (x-3)2+(y-5)2=25 into four parts. Find the area of each of the four parts.
June 4, 2012

Math
Find both the circumference area of the circle whose equation is (x-2)2+(y-3)2=64.
June 4, 2012

maths
4 3 - =8 2
May 31, 2012

maths
sorry the question was, show clearly that, 4 3 -- =8 2
May 31, 2012

maths
show clearly that 4 3 ---=8 2 solve the equation 5x2+14x-24=0
May 31, 2012

Math
x + (x + 17) = 45
May 31, 2012

math
María plans to enclose a rectangular area of her yard using the 16-foot side of her storage shed as one side of the enclosure, as shown above. If she uses 64 feet of fencing to complete the enclosure, what will be the length, x, of the enclosure?
May 28, 2012

I need correct answers for all please !
sorry, I worked hard to get the answers, you need to know this stuff though, try to answer and I will correct it for u
May 24, 2012

Alg 2`
what is the most simplified version of this? (x^2/x^2+2x+1)/(3x/x^2-1)
May 24, 2012

Geometry
Find the arc length, of a 130 degree arc, in a circle with a diameter of 7.2 inches. Round your answer to the nearest thousandth
May 20, 2012

Geometry
A 60 degree arc, of circle A, has exactly the same lenght as a 45 degree arc, of circle B. Find the ratio of the radius of circle A to the radius of circle B
May 20, 2012

Geometry
A circle is divided into three unequal sectors. One of the sectors has (x+40) degrees, the second sector has (2x+60) degrees, while the third sector has (3x+20) degrees. What is the value for x?
May 20, 2012

math
A laser pulse takes 2.56 seconds to travel from Earth to the Moon and return. Use this to calculate how far away the Moon is.
May 19, 2012

composition(paraphrase this paragraph)
self-service procurement. self service business intelligence. self-service recovery. user provisioning in private clouds. it's a wondrous world for end users today as IT departments roll out tools that hand them the reins to the data and services they desire, whether it&#...
May 11, 2012

English
Idon't konw
May 6, 2012

Algebra
x^1/2 * y^1/6 *z^1/5. We are to use rational exponents to write an expression. The sqrt of x - the sqrt of y, over the sqrt of x + the sqrt of y. I need to simplify and use radicals as needed. I obviously do but what...?? Please assist. Thank you.
May 4, 2012

chemistry
If 10L of CO2 at STP and 50g sodium chloride react with excess ammonia and water, what is the limiting reactant and the mass of baking soda produced?
May 2, 2012

math
how do you find the area under a curve
May 1, 2012

vance high school
how i can used division of labor in a sentences?
May 1, 2012

vance high school
how i can used specialization in a sentences?
May 1, 2012

Chemistry
Determine the volume of nitrogen gas at a pressure of 3.00 atm if it had a volume of 400.0 mL at STP.
April 30, 2012

Chemistry
A gas is collected over water at 30.0 degrees celsius. It's pressure is 752.5 mm Hg. What is the pressure of the dry gas? Water vapor pressure at twenty degrees Celsius is 27.5 mm Hg.
April 24, 2012

Chemistry
A gas is collected over water at 30.0 degrees celsius. It's pressure is 752.5 mm Hg. What is the pressure of the dry gas? Water vapor pressure at twenty degrees Celsius is 27.5 mm Hg.
April 24, 2012

math
A pair of dice is rolled, and a number that appears uppermost on each die is observed, Refer to this experiment and find the probability of the given event. (Enter your answer as a fraction)The sume of the numbers ia an add number.
April 21, 2012

Math
2^x+1=1/16 find x
April 17, 2012

chemistry
what mass of ethanol(C2H5OH) will be required to prepare a 2.00m solution in 8.00kg of water?
April 16, 2012

Mathematics
thank you very much. in the 40 day.
April 13, 2012

Mathematics
Kate has a tennis lesson every 5 days. She has a basketball game every 8 days. If she has both a tennis lesson and a basketball game today, on what day will she have both again?
April 13, 2012

Geometery
A cylindrical water tank near Lisa's school is 18 meter high and has a circumference or 33 meter. The given formula can be used to determine the (v) of a cylinder?
April 12, 2012

physics
45
April 2, 2012

physics
A child loses his balloon, which rises slowly into the sky. a) If the balloon is 21.5 cm in diameter when the child loses it, what is its diameter at an altitude of 1150 m? Assume that the balloon is very flexible and so surface tension can be neglected. b) And what is the ...
March 21, 2012

physics
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3527 kg), which is made of steel (ρ = 7850 kg/m^3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong balls. A ping-...
March 21, 2012

physics
A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.19 cm and is 1.25 m above the bottom of the tank. The outlet pipe has a diameter of 5.93 cm and is 4.85 m above the bottom of the tank. A volume of 0.411 m^3 of water enters the tank ...
March 21, 2012

physics
A supertanker filled with oil has a total mass of 14.1·10^8 kg. If the dimensions of the ship are those of a rectangular box 271 m long, 93.1 m wide, and 93.1 m high, determine how far the bottom of the ship is below sea level (ρsea = 1020 kg/m^3).
March 21, 2012

Pre-Calculus
Find all solutions to the equation in the interval [0, 2pi) cos4x-cos2x=0 So,this is what i've done so far: cos4x-cos2x=0 cos2(2x)-cos2x (2cos^2(2x)-1)-(2cos^2(x)-1) No idea what to do next.
March 19, 2012

chemistry
a pitcher baseball moves at 44 M/s . It has 150 J of kinetic energy on its way to the catcher. What is the baseball 's mass?
March 16, 2012

donwoody
A football field forms a rectangle. 120yd long 53yd find the perimeter
March 15, 2012

childhood education
Children readiness to engage in make believe play and the social experiences that promote it
March 15, 2012

Algebra 1
My little sister needs help on her homework and I don't remember really how to do this. I can't tell her if the answers or if she is doing them is the correct way. So if you could please tell me the answer and how you got it that would be great...
March 14, 2012

english
I need help on writing a thesis statement for my informative essay for ENC 1101. I decided to write about adoption and I want to write what the advantages and disadvantages of adoption are. I'm very undecisive on how I should write it. Please help.
March 13, 2012

physics
A small object with mass 4.05 kg moves counterclockwise with constant speed 1.70 rad/s in a circle of radius 3.15 m centered at the origin. It starts at the point with position vector 3.15 m. Then it undergoes an angular displacement of 9.10 rad. (a) What is its new position ...
March 11, 2012

business math
ms. sue, is it $ 1,754.96? Thanks
March 11, 2012

calculus
a)find the first partial derivatives of f(x y)= x √1+y^2 b)find the first partial derivatives of f(x,y)= e^x ln y at the point (0,e)
March 11, 2012

calculus
find the domain of the function f (x,y) = e^-xy
March 11, 2012

C
you are right the question is exactly like this... can you help me for this question.... thanks Write a MAIN function and a FUNCTION to compute the sum of the below series. ((-1)^(n+1)*n!)/(n^n) (from n=1 to infinity) Within the MAIN function: . Read a variable EPSILON of type...
March 9, 2012

Math
Janet has a circular garden in her front yard with a diameter of 8 feet. How does the diameter d compare to the circumference C of the garden? F) D = 1/3C G) D = 1/2C H) D = 2C I) D = 3C
March 8, 2012

Math
Sorry, The length is 7 7/8 in., and width is 5 3/4in.
March 8, 2012

Geometry
Area of trapezoid is 80 square units, height is 8 units. What is the lenght of median ?
March 7, 2012

life orientation
By quet at the job and find another job tha is gud for him by telling athers
March 4, 2012

writing paper
I need to add a cover page to my writing assinment. I can not find any information on what I include in the cover page. This is for Penn Foster College.
March 4, 2012

algebra
(3x3-4x2 -x+6) Divide By (x-2) its 9three x cubed negative 4 xsquare -x+6) divide by (x-2)
February 29, 2012

WORLD HISTORY
My teacher ask us to draw a picture that represents a command economy what can I draw??
February 29, 2012

counseling
its with boundaries of children that have autism
February 28, 2012

counseling
when writing a paper on boundaries with children that have special needs what all would you write about? so far I have responsibility thanks
February 28, 2012

Math
what do you think about math
February 27, 2012

math
explain how the digit 1 can have diffrent values in 111
February 25, 2012

math
Tania is in charge of designing a school pennant for spirit week. She wants the base to be 3 1/2 feet and the height to be 6 1/2 feet. She has 20 square feet of paper available. Does she have enough paper? Explain.
February 23, 2012

Chemistry
how do you get the rate?
February 23, 2012

math
i have 30 coins made up of 5c and 20c pieces that total $3.45. how many of each do i have?????
February 23, 2012

Physics
Going at an angular velocity of 5.2 rad/sec, how far in kilometers will a car have traveled in 10 minutes? Do I just convert minutes to seconds and multiply or...?
February 22, 2012

Physics
A wheel 1 meter in diameter is rotating at 100 revolutions per minute without slipping along a level stretch of road and passes mile marker 0 at 12:00 noon. it continues past mile marker 0 for 10 minutes and then has a period of angular acceleration of 2.5x10^-2 radians per ...
February 22, 2012

Science
thanks
February 21, 2012

Science
Oceans receive freshwater from precipitation and rivers. Yet ocean level do not change very much from these actions. Why are ocean level not greatly affected? a) Water is constantly seeping underground in the ocean; B)Water is constantly evaporating over the ocean's ...
February 21, 2012

English
what are the strengths and what are the weaknesses of George and Lennie's relationship in John Steinbeck's "Of Mice and Men"?
February 21, 2012

Pre-Calculus/Trivia
csc(theta)= 1/x sec(theta)= 1/ sqrt(1-x^2) cot(theta)= sqrt(1-x^2)/x What are these equations used for in real life matters or in regards to calculus? Can't seem to find the answer anywhere :/
February 20, 2012

history
what did jefferson davis believe congress and the government should do about slavery?
February 16, 2012

Economics
-The "Baby Boomers" are in their retirement age. What affect might this have on the productive capacity of a country's labor force? -How does consumer demand and the price mechanism influences demand in the factor market?
February 13, 2012

communication
Can anyone explain to me what the meaning of "communication phenomenon" exactly is? Thankssss!
February 12, 2012

math
how can i make the target number 670,just by using the following digits. 6,9,6,5,9,50
February 10, 2012

Social studies
compare the political system and the political philosophies of China to those ofEgypt and Mesopotamia?
February 8, 2012

Sociology
How to start my thesis statment according with C. Wright Mills about my autobiography and how relates research papers with this theme?
February 5, 2012

Business Finance
210,200.00
January 30, 2012

Business Finance
thanks
January 29, 2012

math
what is 18x5.25
January 24, 2012

Algebra 1
(8.4x10^9)(4x10^-5)
January 14, 2012

chem
Earlier I asked does the following represent an equilibrium situation: 1) A glass of iced tea still has sugar at the bottom after several minutes of stirring. If no more sugar can be dissolved could you explain why that represents an equilibrium? Please
January 13, 2012

PHYSICS
IS IT BETTER TO PUSH A GROCERY CART FROM THE BACK,OR TO PULL IT FROM THE FRONT.
January 12, 2012

PHYSICS
IS IT BETTER TO PUSH A GROCERY CART FROM THE BACK,OR TO PULL IT FROM THE FRONT.
January 12, 2012

chemistry
Do the following represent an equilibrium situation: 1) A glass of iced tea still has sugar at the bottom after several minutes of stirring. 2) The student population at a high school remains constant for 5 years.
January 10, 2012

statistics
A new extended-life light bulb has an average service life of 750 hours, with a standard deviation of 50 hours. If the service life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 hours and 900 hours?
January 9, 2012

chem
1) Does a fire burning in a fireplace represent an equilibrium situation? Why or why not? 2) Does the following represent a equilibrium situation? Liquid mercury and mercury vapour are found in a thermometer.
January 9, 2012

GEOMETRY PARALLELOGRAM QUESTION PLEASE HELP!
Find the value of X and LM if L is Between N and M -NL=6x-5 LM=2x+3 and NM=30
January 8, 2012

English
So I'm writing an analytical essay on The Odyssey, about Odysseus. And I have to pick traits about him and use multiple quotes to support what I say. So I have a paragraph which I am trying to describe his homesickness. Would a quotation about how he yearned to hug his ...
January 4, 2012

physics
One end of a metal rod is in contact with a thermal reservoir at 731 K, and the other end is in contact with a thermal reservoir at 107 K. The rod and reservoirs make up a closed system. If 6450 J are conducted from one end of the rod to the other uniformly (no change in ...
January 4, 2012

physics
An outboard motor for a boat is cooled by lake water at 16.0°C and has a compression ratio of 13.3. Assume that the air is a diatomic gas. a) Calculate the efficiency of the engine's Otto cycle. b) Using your answer to part (a) and the fact that the efficiency of the ...
January 4, 2012

physics
An outboard motor for a boat is cooled by lake water at 16.0°C and has a compression ratio of 13.3. Assume that the air is a diatomic gas. a) Calculate the efficiency of the engine's Otto cycle. b) Using your answer to part (a) and the fact that the efficiency of the ...
January 4, 2012

physics
A Carnot refrigerator is operating between thermal reservoirs with temperatures of 27.9°C and 0.0°C. a) How much work will need to be input to extract 13.7 J of heat from the colder reservoir? b) How much work will be needed if the colder reservoir is at -15.7°C?
January 4, 2012

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 4, 2012

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·105 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise ...
January 4, 2012

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 3, 2012

physics
Two copper cylinders, immersed in a water tank at 46.3°C contain helium and nitrogen, respectively. The helium-filled cylinder has a volume twice as large as the nitrogen-filled cylinder. a) Calculate the average kinetic energy of a helium molecule at 46.3°C. b) ...
January 3, 2012

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·105 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise ...
January 3, 2012

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·10^5 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise ...
January 1, 2012

physics
A gas expands at constant pressure from 6.25 L at 13.1°C until the volume is 7.25 L. What is the final temperature (in K) of the gas?
January 1, 2012

physics
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 19 to 1. If air enters a cylinder at 1 atm and is compressed ...
January 1, 2012

physics
With each cycle, a 2650-W engine extracts 2330 J from a thermal reservoir at 85.1°C and expels 1840 J into a thermal reservoir at 20.9°C. a) What is the work done for each cycle? b) What is the engine's efficiency? c) How much time does each cycle take?
January 1, 2012

physics
Two copper cylinders, immersed in a water tank at 46.3°C contain helium and nitrogen, respectively. The helium-filled cylinder has a volume twice as large as the nitrogen-filled cylinder. a) Calculate the average kinetic energy of a helium molecule at 46.3°C. b) ...
January 1, 2012

physics
Air in a diesel engine cylinder is quickly compressed from an initial temperature of 21.1°C, an initial pressure of 1.00 atm, and an initial volume of 670 cm^3 to a final volume of 44.5 cm^3. a) Assuming the air to be an ideal diatomic gas, find the final temperature (in K...
December 31, 2011

Precalculus
I'm trying to verify the identity: (sin^2 x)/(2)= (secx-1)/(2secx)
December 30, 2011

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