Friday
November 28, 2014

Posts by Avery


Total # Posts: 64

Math
if a flagpole is 20ft tall and casts a shadow of 27ft how tall is a building that casts a shadow of 185ft? write a proportion and solve. round your answer to the nearest foot.
October 30, 2014

Math
without doing the computation, explain why or why not 19.7 is a reasonable value for the expression 122.14 divided by 6.2
October 14, 2014

Math
Can you think of situations in which it might be preferable to compute with decimals rather than fractions or to compute with fractions rather than decimals, give examples of each situation and tell why you think that number form is preferable
October 14, 2014

science
what is the way that an organism either builds up or breaks down materials in the body for energy
September 25, 2014

chemistry
What would be the change in enthalpy if you detonated 10 grams of NI3?
June 6, 2014

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
June 26, 2013

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
June 26, 2013

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
June 26, 2013

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
June 26, 2013

Math
Ericand frank want to equally share 1 and 1/3 feet of rope. What lenght of rope should each friend get?
April 1, 2013

fractions
Not sure how to understand
March 6, 2013

Math
Show that each sequence is geometric. Find the common ratio and write out the first four terms. (Can you explain how to do it too?) > {(5/2)^n) > {(3n/9)} > {3^2n}
January 27, 2013

physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
December 9, 2012

physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
December 9, 2012

physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
December 9, 2012

Math
how to write 0.09 3/40.5 1/3 2/5
December 7, 2012

Physics
Suppose a meteor of mass 3.30 1013 kg is moving at 32.0 km/s relative to the center of the Earth and strikes the Earth. Suppose the meteor creates the maximum possible decrease in the angular speed of the Earth by moving toward the west and striking a point on the equator ...
November 29, 2012

Physics
The density of the Earth, at any distance r from its center, is approximately (14.2-11.6(r/R)*10^3) Kg/m^3, where R is the radius of the Earth. Show that this density leads to a moment of inertia I = 0.330MR2 about an axis through the center, where M is the mass of the Earth. ...
November 18, 2012

Chemistry
A monoprotic acid with a Ka of 2.92 × 10-5 has a partition coefficient of 4.2 (favoring octanol) when distributed between water and octanol. Find the formal concentration of the acid in each phase when 100 mL of 0.10 M aqueous acid is extracted with 31 mL of octanol at (...
November 15, 2012

math
I am a number between 50 and 60. One of my factors is 28. What number am I?
October 23, 2012

Math
How would you derive n(E)= E^2/((e^E/T) - 1) a) Evaluate dn/dE at fixed T. Leave answer in symbolic forms of E and T. b) dn/dT at fixed E.
October 21, 2012

general science
a 210 Newton force is applied to a piston, the force produced is 320 kPa of pressure, what's the area of the piston?
October 4, 2012

Physics/Math
Oh! I understand now, thanks so much to both :)
October 4, 2012

Physics/Math
Sorry, how did you get that? :(
October 4, 2012

Physics/Math
Two cars, 127 miles apart, start moving towards each other at the same time. One is moving 3 times as fast as the other. If they meet 1.5 hrs later, find the average speed of the slower car in miles per hour?
October 4, 2012

4th Grade Math
My number is even. My number has 3 as a factor. My number also has 5 as a factor
September 19, 2012

Physics
Two objects are connected by a light string that passes over a frictionless pulley. The incline is frictionless, m1 = 2.00 kg, m2 = 4.00 kg, and theta= 60.0°. (b) Find the accelerations of the objects. Magnitude (c) Find the tension in the string. N (d) Find the speed of ...
September 19, 2012

Physics
A small bug is nestled between a 1-kg block and a 2-kg block on a frictionless table. A horizontal force can be applied to either of the blocks as shown in figure Q5.24 (i) In which situation illustrated in the figure (a) or (b), does the bug have a better chance of survival, ...
September 18, 2012

Physics
In a 100 m linear accelerator, an electron is accelerated to 1.40% the speed of light in 35.0 m before it coasts 65.0 m to a target. (b) How long does the total flight take?
September 6, 2012

math
How do I draw a reflex angle ZYX so that it measures 255 degrees?
March 5, 2012

Ff
The coefficient of static friction between the m = 3.50 kg crate and the 35.0° incline of Figure P4.41 is 0.340. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? Your response differs from the ...
March 1, 2012

Physics
Assume that the three blocks in Figure P4.27 move on a frictionless surface and that a F = 46 N force acts as shown on the m = 2.5 kg block. Figure P4.27. (a) Determine the acceleration given this system. m/s2 (to the right) (b) Determine the tension in the cord connecting m ...
February 23, 2012

math
173.32. me and my dad did it at the same time.
January 19, 2012

Math problem
1.You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years. a.What ...
November 20, 2011

math problem
Can you determine which number corresponds to the situation THe record high temperature for a date is 95.6 degree above zero What is the corresponding number for this sentence.
November 20, 2011

math problem
Please solve using the addition principle please do check x + 3/13 = 5/13
November 20, 2011

Math problem
evaluate a+b/10 for a = 68 and b =12 a+b/10 =
November 20, 2011

Math problem
The formula b=29a is used to estimate the minimum furnance output B in btus for a modern house with the amount of square feet of flooring A 1. determine the minimum furnance output for a 2300 ft2 modern house 2. solve the formula A
November 20, 2011

Physical Science
An aluminum nucleus has 13 protons and 14 neutrons. A copper nucleus has 29 protons and 34 neutrons. What is the force of repulsion between an aluminum nucleus and a copper nucleus when they are separated by 1.2 nm?
March 26, 2011

math
First, a square gives the greatest area, but the length and width are whole numbers. 4 doesn't go equally into 46, but since it does in 48, the results should be a close to 12 X 12 as possible, so the size is 12 meters by 11 meters 2l + 2w =p 2(12) + 2(11) = p 24 + 22 = 26
March 17, 2011

math
I need help on finding sales tax and discount
February 15, 2011

College Physics
If the river is flowing downstream at 1.5 mi/h and he can swim 2.0 mi/h then the angle he would need to swim at in order to swim straight across would be arctan(1.5/2) which is equal to 36.87 degrees. This is because you can form a right triangle with 1.5 being opposite the ...
February 8, 2011

geometry
How do I figure out the dimensions of each room in a 1200 square foot house with a closet and bathroom the same size, a big family room, and two circular bedrooms?
December 13, 2010

Geometry
no
November 22, 2010

algebra
Solve the proportion x / 12 = 91 /84
September 16, 2010

Math- Geometry
Can anyone help me answer this question... Find the area of a right isoscles triangle if the altitude on the hypotenuse is 4 cm.
September 5, 2010

Math
240 m of fencing material is going to be used to enclose three sides of a rectangular lot. What should the dimensions of the lot be so that the enclosed area is as large as possible? (I'm supposed to solve this using a quadratic equations but I don't know how...)
August 22, 2010

Algebra
don't get it
June 1, 2010

Algebra
A train leaves a city heading west and travels at 50 miles per hour. Three hours later, a second train leaves from the same place and travels in the same direction at 65 miles per hour. How long will it take for the second train to overtake the first train.
June 1, 2010

Algebra
2.5 hours
June 1, 2010

Algebra
Two trains leave Raleigh at the same time, one traveling north, the other south. The first train travels at 50 miles per hour and second at 60 miles per hour. In how many hours will the trains be 275 miles apart?
June 1, 2010

Algebra
A ship travels from New York to southampton, england at 33 miles per hour. A plane traveling 605 miles per hour takes 104 hours less time to make the same trip. How far apart are the two cities?
June 1, 2010

Physics
A non-rotating spherical planet with no atmosphere has a mass M and radius R. A particle is fired off from the surface with a speed equal to 3/4 the escape speed. Calculate the farthest distance it reaches (measured from the center of the planet) if it is fired tangentially. I...
March 24, 2010

Physics
A non-rotating spherical planet with no atmosphere has a mass M and radius R. A particle is fired off from the surface with a speed equal to 3/4 the escape speed. Calculate the farthest distance it reaches (measured from the center of the planet) if it is fired tangentially. I...
March 23, 2010

Calculus
3^2/3^4 I did this through my calulate and I came up with 1/9, but that is not the correct answer. I'm not sure what to do?
March 24, 2009

7th grade math vocabulary
I need a math vocabulary work that begins with a J
March 9, 2009

math
Betty has nine pink ribbons and eight blue ribbons. What fraction of Betty's ribbons are pink? *I am trying to teach my little brother how to do this. How can you write it so i can tell him how to answer the other problems to? I don't just need the answer pelase.
December 4, 2008

HSM 220 Creating a Budget
I had problems too, but somehow figured it out. Take the first amount, such as the rent at $125,000. Multiply 60% times the 125,000 for the basic skills and multiply 40% times the 125,000 for the vocational. Therefore 75,000 for basic, and 50,000 for vocational. Do this for ...
October 9, 2008

science
What layer of the atmosphere acts like a giant magnet? What does it attract?
September 30, 2008

grammar
In the sentence "On track and field day, the teacher was very proficient at announcing the events", is the word "proficient" a noun or verb?
May 8, 2008

Chemistry
Write the equilibrium expression, and calculate Kp for the reaction under the conditions described: 2NaHCO3 (s) --> <--- Na2CO3 (s) + H2O (g) + CO2 (g) 100 g of solid NaHCO3 was placed in a previously evacuated rigid 5.00 L container and heated to 160 degrees C. Some of ...
January 30, 2008

Chemistry
Write the equilibrium expression, and calculate Kp for the reaction under the conditions described: 2NaHCO3 (s) --> <--- Na2CO3 (s) + H2O (g) + CO2 (g) 100 g of solid NaHCO3 was placed in a previously evacuated rigid 5.00 L container and heated to 160 degrees C. Some of ...
January 30, 2008

social studies
how did women help prepare for the civil war??? i cant find in s.s book you should double check your book. if you cant find it in there you could use the internet, but i would check the book
March 1, 2007

Math
I need help with this problem: If N= {1,2,3,4,....}, A= {x/x=2n-1, n E N}, B={x/x=2n, n E N}, and C= {x/x+2n +1, n=0, or n E N}, find the simplest possible expression for each of the following: a. A U C b. A U B - the U stands for union c. A (intersects) I can't find the ...
September 17, 2006

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