Tuesday
May 26, 2015

Posts by megan


Total # Posts: 974

Algebra 2
A box contains 4 blue golf tees, 2 red ones, 1 yellow tee, and 3 white ones. Two tees are randomly drawn from the box. Find the probability of choosing a blue tee followed by a red one, if the first tee chosen is returned to the box before choosing the second tee?
February 28, 2012

Algebra 2
Two cards are randomly drawn from a standard deck without replacing the card after the first draw. Find the probability of drawing a spade followed by a heart?
February 28, 2012

Algebra 2
The numbers 1 through 9 are written on slips of paper and placed into a hat. Two slips are randomly drawn. If the first slip of paper is not returned to the hat after it is drawn, find the probability of getting a six and then a three?
February 28, 2012

math
what does z equal in the equation 3z minus z equals 24
February 25, 2012

Physics 2
A wire has a length of 4.52 x 10-2 m and is used to make a circular coil of one turn. There is a current of 7.94 A in the wire. In the presence of a 8.04-T magnetic field, what is the maximum torque that this coil can experience?
February 25, 2012

Physics 2
A wire has a length of 4.52 x 10-2 m and is used to make a circular coil of one turn. There is a current of 7.94 A in the wire. In the presence of a 8.04-T magnetic field, what is the maximum torque that this coil can experience?
February 25, 2012

Geometry Are these two triangles similar? Thanks!
Thank you :]
February 20, 2012

Geometry Are these two triangles similar? Thanks!
Are these two triangles similar? How do you know? There are two triangles HMG and JMK They are connected at the top point at M H is on the bottom left, G is on the bottom right, and M is at the top for triangle HMG For triangle JMK J is on the bottom right and K is on the ...
February 20, 2012

6th grade Social studies
What was the main effect of the repeated exiles of the Jews?
February 18, 2012

Math
Find two numbers on the 30-board(the factor game) with the greatest product.
February 16, 2012

Chemistry
Determine the grams of hexane that will react exactly with 22 g of oxygen. Show all working please. Thank you.
February 12, 2012

Chemistry
Calculate the moles of hexane required to form 150 g of carbon dioxide. Please show all working. Thank you.
February 12, 2012

Africa
Why did Greg mortenson start pennies for peace
February 9, 2012

literature.......
Yes i like it. Its really good. Im supposed to make a realistic fiction story too and i want to do it by myself with a little help. i love writing but not this genre i like making stuff up! Good luck. :)
February 5, 2012

Geometry
Find the area of a rhombus with a 45 degree angle and sides of 12m long?
February 1, 2012

math
what three consecutive months would have the least number of days
January 31, 2012

consumer math
did you ever figure this out? what was the answer?
January 30, 2012

Alegbra
Six angles in a hexagon are fit together.It looks like this... _____ /\ / \ /_1\6/_5\ \ 2/3\4/ \/____/ I try to draw the picture as best as I can but try to imagine. It's a hexagon with the six angles labeled near the center of the hexagon. The options given to this ...
January 30, 2012

math
A statue is made of a mixture of copper and zinc in a ratio of 11:4 (copper to zinc). If the weight of the statue is 3165 pounds, what is the weight of the copper?
January 29, 2012

math
The perimeter of the triangle is 40 inches. If you wanted to construct a similar triangle with a perimeter of 50 inches, what would be the length of the shortest side of the triangle?
January 29, 2012

Math
• 1 mile=5280 feet • 1 foot=12 inches • 5280 X 12 = 63,360 inches in 1 mile • 400 x 63,360 = 25,344,000 inches in 400 miles (this is how many inches SLC and Reno are apart today. • 250 x 63,360 = 15,840,000 inches in 250 miles (this is how many inches ...
January 27, 2012

algebra
y=1/2x-1
January 27, 2012

Physics
In a cathode ray tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.71 x 105 N/C during the first 5.49 cm of the tube's length; then they move at essentially constant velocity another 47.9 cm before hitting the screen. Find the ...
January 25, 2012

chemistry
Calculate the number of moles in 35.7 grams of Na3PO3
January 21, 2012

Calculus
What exactly is an integral? I understand it is the area under a curve but what does it pertain to?
January 17, 2012

Math
How do you find the exact value of: 4sin 60degrees - 3tan 135degrees
January 10, 2012

geometry
a company logo is a rhombus with4-cm sides and angles of 60 degrees and 120 degrees. find the angle measures and side lengths if the logo is changed as follows
January 9, 2012

Alebra
Kathy works at an optical store selling eyeglasses. Each week she earns $180 plus a 2% commission of her total sales for the week. Next week she wants to earn at least $350. 1. Write an inequality that represents the dollar amount of eyeglasses kathy must sell to earn at least...
January 3, 2012

Physics
A vessel contains 10 kg of water and an unknown mass of ice at 0°C. The temperature of the vessel is monitored for 60 minutes. During the first 50 minutes, the temperature remains at 0°C. For the next 10 minutes, the temp steadily increases from 0°C to 2°C. a. ...
December 8, 2011

physics
A track star goes in the long jump at 10 m/s at 37 degrees above the horizontal. What is the magnitude of the horizontal displacement?
December 7, 2011

Physics
How can one find the magnitude and the directions of a resultant if Vector A is 35N @ 60' NE, and Vector B is 50N @ 20' NW?
December 4, 2011

Physics
How can one find the magnitude and the directions of a resultant if Vector A is 35N @ 60' NE, and Vector B is 50N @ 20' NW?
December 4, 2011

math
18a^3 + 30a^2 / 3a
December 1, 2011

math
18a^3 + 30a^2 / 3a
December 1, 2011

chemistry
What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?
November 29, 2011

Calculus
A storage tank used to hold sand is leaking. The sand forms a conical pile whose height is twice the radius of the base. The radius of the pile increases at the rate of 2 inches per minute. Find the rate of change of volume when the radius is 5 inches.
November 23, 2011

geometry
I'm so confused...can someone please help??? I need to find the orthocenter of the triangle with the vertices R(-4,8), S(-1,5), T(5,5)??? How do you get 'y' for this problem?
November 21, 2011

world history
I have the same question on my test,I have my book in front of me and yes, it is D.
November 18, 2011

Chemisty
Iodine monobromide and ammonia react to produce nitrogen triiodide and ammonium bromide. (a) Balance the chemical equation for this reaction. (Use the smallest possible whole numbers. Enter 1 where appropriate. Do not leave any answer box blank.) . IBr(s) + . NH3(g) . NI3(s...
November 16, 2011

Science
Thermite is a mixture of iron(III) oxide and aluminum powders that is used in some countries to weld railroad tracks. It is a spectacular reaction to yield solid aluminum oxide that floats on the molten iron. When cooled, the iron is ground smooth and even with the rest of the...
November 16, 2011

Science
Al(OH)3(s) + HCl(aq) AlCl3(aq) + H2O(l) How many moles of HCl are required to react with 0.470 g of Al(OH)3 in the above unbalanced reaction? Use at least as many significant figures in your molar masses as in the data given. mol HCl What mass of HCl is required? How many ...
November 16, 2011

math
5.3+4=3.24-2.7
November 14, 2011

math
5.3+4=3.24-2.7
November 14, 2011

statistics
A nationwide study indicated that 27% of adults said that chocolate was their favorite ice cream flavor. A simple random sample of 150 adults is obtained. A.) Describe the sampling distribtuion of p, the sample proportion of adults whose favorite ice cream flavor is chocolate...
November 11, 2011

calculus
Question 1 The figure below shows the rate of change of the quantity of water in a water tower, in liters per day, during the month of April. If the tower had liters of water in it on April 1, estimate the quantity of water in the tower on April . Round your answer to the ...
November 10, 2011

Logic- Formal Proof
I need to solve a proof and I cannot figure it out. The instructions say only that I will have to use subproofs within subproofs. Premises: A or B A or C Conclusion: A or (B and C)
November 9, 2011

geometry
what is the slope of the line determined by the equation 2x+y=5?
November 8, 2011

fraction 10-1 math
camp big trees has 3 red canoes and 4 blue canoes. what fraction of the conoes are red ?
November 7, 2011

fraction 10-1 math
camp big trees has 3 red canoes and 4 blue canoes. what fraction of the conoes are red ?
November 7, 2011

Algebra
Thank you so much!! It really helped me understand!
November 4, 2011

Algebra
Rationalize the denominator: 5 /4-squareroot 5 (five over four minus square root five) Please explain
November 4, 2011

Algebra
Thank you!
November 4, 2011

Algebra
Two hoses are connected to a swimming pool. Working together, they can fill the pool in 4 hr. The larger hose, working alone, can fill the pool in 6 hr less time than the smaller one. How long would it take the smaller one, woking alone, to fill the pool? Please explain
November 4, 2011

english
what is an appositive phrase?
November 4, 2011

math
write a matrix for x-y=8,-2x-5y-6z=-27, 9x+10y-z=54
November 2, 2011

Culture Diversity
I have a paper due soon where I need to interview three Japanese Americans. Could any Japanese American answer the following questions for me? I would greatly appreciate it! If you dont feel comfortable answering some of them just leave them blank, Thanks! What is your first ...
November 2, 2011

physics
Consider the window (of area 0.68 m2) of an airplane. If the pressure inside the plane is atmospheric pressure, while the pressure outside is 31 % of Patm, find the force on the window. Ignore the velocity of the airplane (i.e., ignore Bernoulli’s effect).
October 28, 2011

Physics
If the pressure outside a window drops by 9.1%, while the pressure inside does not change, what is the force on the window? Assume that the area of the window is 2.3 m2.
October 28, 2011

Physics
Correction h + (d^2)/4h
October 17, 2011

Physics
h + (d^2)/h
October 17, 2011

ALGEBRA-Help please
Find the solution to the following system of two linear equations, if it has a solution. x+3y=4, 3x+9y=12
October 13, 2011

Math
I dont think I follow....
October 13, 2011

Math
1) Find the solution to the following system of two linear equations, if it has a solution. 2x-y=3, -x+y=1 2Find the solution to the following system of two linear equations, if it has a solution. 2x+y=4, x+3/2y=3
October 13, 2011

math
When is an exact number needed and when is an estimate okay?
October 10, 2011

World History
Everybody is saying the answer is Traditional Brahman elites,but that is so wrong. I ahve my history book here in front of me, and it says the answer is The Buddhist clergy .
October 10, 2011

physics
A military gun is mounted on a railroad car (m = 1590 kg) as shown in Figure P7.34. There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 26 kg with a velocity of 280 m/s at an angle of 28° ...
October 2, 2011

physics
How long does it take an automobile traveling 62.0 km/h to become even with a car that is traveling in another lane at 37.5 km/h if the cars' front bumpers are initially 138 m apart? in seconds
September 29, 2011

Calculus
Let A be the region bounded by the curves y = x^2-6x + 8 and y = 0. Find the volume obtained when A is revolved around the Y-AXIS
September 26, 2011

Calculus
Let A be the region bounded by the curves y = x^2-6x + 8 and y = 0. Find the volume obtained when A is revolved around the Y-AXIS
September 26, 2011

Science
Why does a toy car go faster and further when it is added weight onto it and is put on a ramp at 45 degrees?
September 25, 2011

biology
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
September 22, 2011

Math word problem
A carpenter wants to put four shelves on an 8-foot wall so that the five spaces created decrease by 6 inches as we move up the wall. If the thickness of each shelf is 3/4 inch, how far will the bottom shelf be from the floor?
September 21, 2011

chemistry
An unknown rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide. If the mass is 21.3g, what is this substance’s density?
September 16, 2011

Biochemistry
What is the pH after 5 mL of 0.1M NaOH has been added to 25 mL of 0.2M acetic acid?
September 8, 2011

math
Brandon’s rentals charges $ 25 per hour to rent a Windsufer and a wet suit. Wendy’s charges $20 per hour plus $15 extra for a wet suit. Find the number of hours for which the total charges for both would be the same.
September 8, 2011

science
The radius of the Iron atom is 124 pm. How many of these will span a distance of 50.5 m..
September 5, 2011

math
a person can copy the final exam in 28 minutes using a new copy machine. using an old copy machine, it takes 70 minutes. if both machines are used, how long will it take to complete the job
August 2, 2011

Physics-Need Help fast!
Two converging lenses, each of focal length 15.1 cm, are placed 40.2 cm apart, and an object is placed 30.0 cm in front of the first lens. Where is the final image formed? The image is located... What is the magnification of the system? M =
August 1, 2011

Physics-Need Help fast!
Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If the sound frequency ...
July 27, 2011

Math
Find a polynomial of minimum degree with zeros -3, -2 and 1 (of multiplicity 2)
July 16, 2011

Math
Given the function f(x) = 7 - 6x, evaluate f(x+h)-f(x)/h
July 16, 2011

Math Calculus
Reiny, Before you do equals to zero, how did you get 0.04x^3 + 55x^2 - 1380 = 0? I set 0.04x + 55 - 1380/x^2 = 0 and I got x=-137.317, or x=-5.204,, or x=4.921 if i plus in to the originals i have to plus each x's? and the minimum average is the smallest number from the ...
July 8, 2011

Math Calculus
no i don't see any negative sign in my homework question... first I did C*bar(x)/x = 0.02x^3+55x^2+1380/(x) = 0.02x^2 + 55 x + 1380/x then I differentiate it C*bar*'(x) = 0.4x - 1380/x^2 +55 then I set it equal to zero which gives me x = -137.317 or x=-5.104 and 4.921 ...
July 8, 2011

Math Calculus
Let C(x) = 0.02x^3 + 55x^2 + 1380. Find the minimum average cost for this commodity. I got to the point where I got x=-1374.98, x=-5.018, x=5 but what do I have to do again after this? Because I am missing some steps after I find x. Do i have to plug all the X's to the ...
July 8, 2011

Math Calculus
sorry actually i got that part which is part a. What I need is part (b). Find the delta(v)
July 8, 2011

Math Calculus
Thank you soo muccchh
July 8, 2011

Math Calculus
A sphere is initially measured as having a radius of 4 inches. A subsequent measurement shows that the radius is really 3.99. Find (a) the actual difference in volume between the initial measurement and the correction, and (b) the difference as estimated through differentials...
July 8, 2011

Math Calculus
Thank you very much for your help :)
July 8, 2011

calculus
thank you very much
July 8, 2011

calculus
A rectangular aquarium is to be built with an open top (no material needed) and a square base. You have 60 square feet of material to build it with. (We are assuming that the sides and bottom are perfectly flat). What is the maximum volume that this aquarium might have? Note-...
July 8, 2011

Internet- Virtual Communities
I need help on explaining how cyber bullying relates to virtual communities for a paper that I need to write.
July 6, 2011

chemistry
what is an ionic compound that forms an acid-base neutralization reaction?
July 5, 2011

science
A patient presents with angina pectoris due to inadequate blood supply. Which diagnosis best describes this condition?
July 4, 2011

alga br e
How many ft of fencing is needed to enclose a square with 33ft sides
July 3, 2011

Science
A chemist is studying the following equilibrium: 2Pb(NO3)2 (s) ! 2PbO (s) + 4NO2 (g) + O2 (g) He starts out with 10 g of Pb(NO3)2 and, at equilibrium, has 2.02 g of PbO. The concentrations of NO2 and O2 at equilibrium are 0.25 M and 0.019 M, respectively. What is the value of ...
June 30, 2011

Science
Three acids solutions have the following pH: Solution A: pH = 2 Solution B: pH = 5 Solution C: pH = 3 Which solution is made with the acid that has the smallest ionization constant?
June 30, 2011

Physics
A 3 kg block is being pulled by a string at a constant speed on a surface with a coefficient of kinetic friction of 0.3. If the string is at an angle of 30 degrees with the horizontal, what is the magnitude of the force necessary to pull the block?
June 30, 2011

math
ohh that makes sence! thank you!!
June 28, 2011

math
-1/7 divided by -4
June 28, 2011

math
how to solve it
June 28, 2011

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