Friday
April 18, 2014

Posts by MAry


Total # Posts: 3,166

geometry
Thank you

geometry
The length of each edge of a trianglar tent if 8 ft. ( 3 sides and a bottom) (a) Find the area of each face (b)Find the total surface area of the four faces

Geometry
Is my answer 324 mm

Geometry
What is the area of a circle formed by the intersection of a plane that is 24 mm from the center of a sphere whose radius is 30 mm.

Geometry
Ms Sue could you give me a little more help I've never done this kind of problem.

Geometry
How do you find the slant height of a cone whose height is 8 feet and whose diameter is 16 feet.

math
A polygon is a simple closed curve that is constructed by joining line segments where each line segment intersects exactly two others. a polygon has many sides.

calculus
Please help. Applying the chain rule, how do I find the derivative of f(x)=In(e^x-e^-x) (x>0) and then using this answer use the quotient rule to find the second derivative. I cannot do this so any answer greatly appreciated.

math
given a length of wire to construct a geometric figure with it, what fugure encloses the greatest area

5th grade math
how do you reduce 15/20 and 8/20?

algebra
Thank you so much could you look at my other problem

algebra
solve for x -2x^2-4x+5=0 is the answer -2.22, 0.22

algebra
I tried it your way and this is what I came up with x = 2} 6ã3 am I right?

algebra
solve for x 3x^2-12x+3=0 is the answer 1/3, 3

algebra
Thank you math mate

algebra
solve (4x^2+2x-4) - (x^2-5x-4)= I came up with 3x^2+7 is my answer correct?

algebra
Thank you damon

algebra
simplify (y+5)(y+1)

Algebra
Thank you damon

Algebra
What is the slope of the line that passes through the points (3, 3) and (2, 5)? m= 2 m= -1/2 m= 1/2 or m= -2 I came up with m= - 1/2 but I'm really not sure if Im correct

Algebra
what is the next number in this sequence? 0.4, -2, 10, -50 choices are -110, 250, 100, 120 would it be 250

algebra
What is the next number in the sequence. 0.9, 5.4, 32.4, 194.4, ... Is it 1166.4

Algebra
what is the next number in this sequence? 0.4, -2, 10, -50 choices are -110, 250, 100, 120 would it be 250

Algebra
multipy & simplify 2a^2 b^3 x 4a^-3 b^-2 ---------- ------------ 2ab^4 9a^2 b My answer: 2 ------ 3a^12 b^24

Algebra
I am really having problems with monomials: Please help! Simplify: 4x^2 y^3 Z ----------- (divided by) 5y^4 Z^3 is the answer 4x ------ (divided by) 5yz^2

Algebra
I am resubmitting - Simplify: 3x^2 y^6 Z^2 ------------ (dividided by) 4x^4 y^3 Z^4 my answer ?? 3y^2 ------- 4x^2 Z^2

Algebra
(a^2 b^3)^2 ----------- (a^4 b^2 c)^2 Is Simplified answer b^2 --------- a^4 c^2

Algebra
Simplify: 3x^2 y^6 Z^2 ------------ (dividided by) 4x^4 y^3 Z^4 my answer ?? 3y^2 -------- 4x^2 Z^2

Algebra
Simplify: 3x^2 y^6 Z^2 ------------ (dividided by) 4x^4 y^3 Z^4 my answer ?? 3y^2 -------- 4x^2 Z^2

Algebra
Simplified is (3x)0 power exponent simplified as 3x or 0 (also how do I express a power after a # when asking a question)

Math/117
Because we are working with exponents, your answer should be in exponential form. How would you respond to this problem including exponents? 3^5 * 3^5. What rule would you apply?

Algebra
Equation S=-16t^2 +100 write equation t^2 =

Algebra
In chemistry, n molecules of an ideal gas have pressure (P), volume (V), and temperature (T) that stand in the following relation, where R is a constant. PV = nRT If you solve for n what would be a good equation? I came up with n=PV/RT Some other choices are n= PV - RT n= PVRT

algebra
SOLVE A=bh for b I came up with b= A/h Am I correct?

Algebra
The formula for converting Celsius temperatures to Fahrenheit temperatures is F= 9/5C + 32 where F is the temperature in degrees Fahrenheit and C is the temperature in degrees Celsius. Which formula could be used to convert Fahrenheit temperatures to Celsius temperatures? Choi...

Algebra
An object which is dropped from 100 feet above ground falls according to the formula s = -16t^2 + 100, where s is the distance from ground level at time t. Which equation is equivalent to this formula? S-100 = t^2 ------- -16 S-100 = t^2 ------ 16 s - 100 = t^2 --- -16 or S-10...

algebra
Solve the following system of equations: x + 2y - z = 2 -3x + y + z = -9 x + y - 2z = 5 I came up with (-2,-11/3, -2) Is this correct?

Algebra
A farmer plans to plant 270 acres of his farm with wheat and soybeans. For every 2 acres of land planted with soybeans, the farmer wants to plant 7 acres of land with wheat. The farmer uses the following system of equations to determine how many acres of each crop he should pl...

5th grade math
Kat has 30 vehicles. Some are bicycles and some are cars. These vehicles have a total of 88 wheels. How many bicycles are there?

ALGEBRA
A golf ball is tossed straight down out of an airplane. The downward velocity of the ball at various times is given in the table below. SEC AFTER THROW DW VELOSCITY X m/s Y 1 21.8 1.6 27.68 2 31.6 2.2 33.56 What is the slope of the line that firs this data? Is it 7.8 8.8 9.8 o...

Math
Solve. 25x^4-15x^2+2=0

math
Multiply (b + (1)/(5)) (b + (1)/(3)) Simplify your answer

math
Jack usually mows his lawn in 4 hours. Marilyn can mow the same in 5 hours. How much time would it take for them to mow the lawn together?

math
Evaluate the polynomial for x = -2. Simplify your answer 3x² - 2x +2

Math
Use the quadratic formula to solve the equation. x² - x = -2 Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

Math
I need some help!!! Multiply (Simplify your answer) (4x +5)(9x² +2x +7)

science
Why is homework so important

algebra
-12x+10/5 = - x/20 I can't decide if I should cross multiply by -20 or just 20. The - is in the middle of the x and 20 (like a fraction) I came up with 2 possible answers: x=40/49 and x = 40/47

algebra
-12x+10/5 = - x/20 I can't decide if I should cross multiply by -20 or just 20. The - is in the middle of the x and 20 (like a fraction) I came up with 2 possible answers: x=40/49 and x = 40/47

algebra
Which of these is a function? y = 2x - 64 {(3, 6), (5, 8), (3, -6), (5, -8)} x = y^2 {(1, 3), (2, 4), (1, 4), (2, 3)} My answer y = 2x - 64 is this correct

math
a bag of marbles can be divided in equal shares among 2,3,4,5, or 6 friends. What is the least number of marbles that the bag could contain?

Intro to Physical Science
By what criteria might you determine whether a question might be answered using the scientific method?

geometry
I have a circle with a radius of 20in. Arc mEGF = 235(not shaded part of circle) find the area of arc EF (shaded sector of circle). My answer was 82.3 in^2 correct answer is 436.3 in^2 I need disrection on this one- I was really off on my answer.

Geometry
thanks for helping bob

Geometry
I missed this problem on my test. I had 23 ft and the correct answer was 16 ft. How should I of worked this problem? A trapezoid has base lengths of 8.5 and 14.5 feet with the area of 184 square feet. What is the height of the trapezoid? Thanks for your help!

Geometry
Need help I missed this problem on my test. My answer was 31.8in^2. The right answer was 8.0in^2 How should I have worked the problem: A pie has a diameter of 9 inches. Each slice of the pie has a central angle of 45 degrees. What is the area of each slice of pie?

Geometry
find the surface area of a right cylinder with a diameter of 4cm and a height of 6cm. Round to the nearest hundredth. Book answer is 100.53cm^2 I came up with 150.79cm^2 my work: 2rr(4)6)=150.79cm^2 What did I do wrong??

Geometry
The lateral area of a regular pyramid is 300 square units. The perimeter of its base is 100 units. Find the slant height of the pyramid. my answer is 5 units is this correct?

Geometry
A cylindrical flower pot with an open top needs to be painted. The height of the pot is 9 inches and the radius is 3 inches. If it takes Troy 5 minutes to paint 40 square inches, how long to the minute will it take him to paint the outside of the flower pot? I came up with 20 ...

geometry
Thank you so much Jai-that really cleared thing up

geometry
Find the surface area of a rectangular prism with a length of 8 inches, a width of 5 inches and a height of 2 inches. so far this is what I have- (2(8)+2(5))2=72 + 2(8.5)=80 my answer is 152in^2 the books answer is 132in^2 What did I do wrong???? Thanks for the help!

math
A Turbine 14 feet in diameter spins at 2,100 rotations a minute. How fast is a spot on the edge of the turbine going per minute? Using 22/7 for pi My answer is 92,400ft per min is this correct?

algebra
Sheila leaves her home to go to her sister's house, which is a 24-mile drive. The trip takes 36 minutes. She returns home taking the same route at a speed that is 5 miles per hour faster. How many minutes did the trip home take? I came up with 33 is this correct?

Chemistry
if some volatile impurities in the crucible are not burned off in step 1 but are removed in step 4 is the reported percent mass of water in the hydrated salt too high or too low?

physics
Three objects -- two of mass m and one of mass M -- are located at three corners of a square of edge length l. Find the gravitational field g at the fourth corner due to these objects. (Express your answers in terms of the edge length l, the masses m and M, and the gravitation...

physics
Three objects -- two of mass m and one of mass M -- are located at three corners of a square of edge length l. Find the gravitational field g at the fourth corner due to these objects. (Express your answers in terms of the edge length l, the masses m and M, and the gravitation...

physics
A particular tower clock similar to Big Ben has an hour hand 2.70 m long with a mass of 62.0 kg, and a minute hand 4.80 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. (You may model the hands as long thi...

chemistry
I need help on a few of these. A. How many protons are in one atom of fluorine - 19? B. How many neutrons are in one atom of potassium - 39? C. How many electrons are in one neutral atom of V - 51? D. What is the symbol for the element that has 78 protons? E. What is the symbo...

Chemistry
A 230. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 60.°C?

Chemistry
What is the pressure of 495 mL of oxygen gas at 30.5°C and 710. mm Hg if the conditions are adjusted to 310. mL and 80.5°C? Assume the amount of gas is held constant.

Chemistry
A closed container with a mixture of hydrogen, helium, and argon has a total pressure of 3.00 atm. The partial pressure of hydrogen is 0.550 atm and the partial pressure of argon is 615 mm Hg. What is the partial pressure of helium?

Chemistry
What is the volume of 150. mL of oxygen gas at 72.0°C and 110. mm Hg if the conditions are adjusted to 750. mm Hg and 82.5°C? Assume the amount of gas is held constant.

Chemistry
What is the final volume of 945 mL of neon gas at 174°C if the gas is cooled to 58.5°C? Assume the pressure and the amount of gas are held constant.

Chemistry
To what Celsius temperature must 32.5 mL of methane gas at 60.0°C be changed so the volume will be 62.0 mL? Assume the pressure and the amount of gas are held constant.

Business & Society
What are two forces that you believe shape the relationship between business and society?

math
weekly take home pay for those 20 graduate teaching assistants from university z: 500.75, 217.43, 488.25, 405.78 485.46, 495.48, 370.75, 435.40 479.65, 482.56, 470.28, 489.90 382.50, 500.75, 465.32, 481.25 506.43, 225.50, 504.38, 179.25 1. what are the mean and standard deviat...

accounting
Compute inventory turnover for 2005 and 2004. The inventory balance at December 31, 2003, was $294 million. Do the trend of net income from 2004 to 2005 and the change in the rate of inventory turnover tell the same story or a different story? Explain your answer.

Science
An 850 N Skydiver experiencing 200 N of air resistance? Calculate.

math
weekly take home pay for those 20 graduate teaching assistants from university z: 500.75, 217.43, 488.25, 405.78 485.46, 495.48, 370.75, 435.40 479.65, 482.56, 470.28, 489.90 382.50, 500.75, 465.32, 481.25 506.43, 225.50, 504.38, 179.25 1. what are the mean and standard deviat...

chemistry
15.45 grams of solid potassium chlorate decomposes when heated to form potassium chloride and oxygen gas. assuming 100% yeild how many grams of solid potassium will be produced?

physics
A car drives 100 meters at 30 degrees north of east, stops, turns to an angleof 210 degrees from the east, and then drives another 60 meters. What is the magnitude of the total displacement?

Geometry - Bob
Problem : Howm do you find the area of a circle circumscribed about a regular pentagon with a perimeter of 50 inches. So far I each side of pentagon is 10. How do I find the radius of the circle? Is this the correct direction to go? I your link & I was unable to come up with t...

Geometry
Find the area of a trapezoid ABCD with verticles A(2,2) B(4,6) C(4,-3) and D(2,-1). Should I use a graph and go from there? I'm just not sure of how to set this up. The book answer is 12units. I am not coming up with the answer

Geometry
Problem : Howm do you find the area of a circle circumscribed about a regular pentagon with a perimeter of 50 inches. So far I each side of pentagon is 10. How do I find the radius of the circle? Is this the correct direction to go?

Geometry
Rhombus ABCD has an area of 264 square units. If DB=12 units find AC. So far this is what I have- 1/2(264)=132 132/2=66 66-12=44units Is this the correct process?

Geometry
Find the area of a trapezoid ABCD with verticles A(2,2) B(4,6) C(4,-3) and D(2,-1)

Geometry
Find the area of a nonagon with a perimeter of 126 inches. Round to the nearest tenth.

Geometry
Find the area of a regular hexagon with side length of 10 centimeters. Round to the nearest tenth.

english
thank you. Now I need to combine the sentences by changing the italicized word group to an infinitive or infinitive phrase. The weather bureau uses balloon. They determine the temperature aloft. the italicized words are - they determine the temperature aloft.

english
I watch for the sales

english
I need to combine the following sentence by changing the Italicized group of words into a gerund or gerund phrase. Then write the complete sentence using (prepositional phrase with a gerund object) I watch for the sales. This way I save money.

math
25 pea pods were broken apart and the number of peas in each pod recorded. The record looked as follows: # peas in pod; 2,3,4,5,6 and frequency; 7,9,5,3,1 Make a histogram for this data, does this data appear to be skewed? What is the model class for this survey?

psychology
Are the cognitive intervention tools: operant conditioning, cognitive rehearsal, positive reinforcement, and journaling? I just want to know if this is correct.

chemistry
if you start with ten grams of lithium hydroxidr, how many grams of lithium bromide will be produced

SCI 275
Do you think I should write a completley different paper? Is any part of my paper good? I orginally wanted to write about the pros and cons of wind energy but did not know how to go about it. I did not think I could meet my word requirements.

SCI 275
. Final Project: Mitigation Strategies and Solutions • Resource: Appendix A • Use the topic you chose for the Capstone Discussion Question or choose another topic you have learned about over the past 8 weeks. • Focus on a specific environmental problem in your t...

Math
A= 3pi r squared?

Math
Yes, sorry about that.

Math
Which of the following formulas could be used to calculate the combined area,x of threw identical circles? A. X= 3pie r squared B. X= 6 pie r C. X= pie r squared/ 3 D. X= 6 r/ pie

math
I need to know when you have lettets how csn you deternine what the numbers will be. Ex: GRAPE - PLUM = APPLE. How would I he able to know what numhers represent the letters? Thanks

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