Wednesday
August 20, 2014

# Posts by Anonymous

Total # Posts: 69,730

algebra 2
The height of an arrow shot in the air is given by the function h(t)=-16t^2+144t+24, where h(t) represents the height in feet, and t represents the time in seconds. what is the maximum height of the arrow? how long does it take to reach the maximum height? how long does it ...
June 16, 2014

Statistics
Assume that a standardized test is designed to have the mean score of 100 and the standard deviation of 15. At the 95% confidence interval, how large does the sample size have to be if the margin of error is to be 3 points?
June 15, 2014

math
Compute Sun Jung's estimated tax payment for the second quarter. She is self-employed and she expects to earn $61,760 this year. Her estimated income tax rate is 23%. For self-employed persons, social security tax is 12.4% of wages up to$106,800, and Medicare tax is 2.9% ...
June 15, 2014

chemistry
calculate the percentage by mass of oxygen in trioxonitrate(v) acid
June 15, 2014

chemistry
calculate the percentage by mass of ozygen in trioxnitrate5 acid H-1, N-14, O-16
June 15, 2014

English
Which of these two sentences is correct? Is there a different correct format? This construction is different than in English. This construction is different from English.
June 15, 2014

physics
a pendelum in a fathers clock measures .90m from the support to the centerof the bob
June 15, 2014

physics
The cg of the 50.0 N pole held by the pole vaulter is 2.00 m from the left hand, and the hands are 0.700 m apart. Calculate the force exerted by each hand.
June 14, 2014

Physics
A person is carrying a plank of wood 2.00 m long with one hand pushing down on it at one end with a force F1 and the other hand holding it up at 50.0 cm from the same end of the plank with force F2. If the plank has a mass of 20.0 kg and its center of gravity is at the middle ...
June 14, 2014

Physics
Use Newton's second law: F=ma F=(1 kg)*2 m/s² = 2 N If F=2N and a=8m/s², then m=F/a
June 14, 2014

Physics
Use Newton's second law: F=ma, or a=F/m
June 14, 2014

Algebra
simplify 5!/3! A. 5 B. 20 C. 40 D. 120
June 13, 2014

Algebra
A ramp leads up to a building. The top of the ramp is 4 feet above the ground, and the bottom is 14 feet from the building. what is the length of the ramp? I think the answer is 18 ft. choices are: A. 18.6ft B. 18ft C. 14.6ft D. 10ft
June 13, 2014

Algebra
would it be B
June 13, 2014

Algebra
Ms. Chang has 24 students in her class, and 8 of them are boys. What is the ratio of boys to girls? A. 1:2 B. 1:3 C. 2:1 D. 2:3 I think the answer is D but i'n not sure.
June 13, 2014

Physics
Use 1/f=1/di + 1/do and Magnification M=hi/ho=-di/do Use metres throughout do=0.30 f=+0.08 m (converging lens) di=1/(1/f-1/do) =0.1091 (image distance) So image is real (di >0) and on the right-hand (emerging) side of the lens. M=-di/do=-0.364 (image smller, inverted, M<0)
June 13, 2014

BIB 351
June 13, 2014

Algebra
A garden is going to be built in the city park. the garden height is 5m. and the width is 7.5 m. a. A short fence will be built around the perimeter of the garden region. Find the number of meters of fencing required. Round your answer to the nearest tenth of a meter. Show all...
June 13, 2014

Algebra
Thank you
June 13, 2014

Algebra
1. A printer can print 40 pages in 1.6 minutes. a. Write and solve a proportion to find the number of pages that the printer can print in 5 minutes. Show your work. b. Lana wants to use the printer to print 150 pages. Find the time, in minutes, it will take to print 150 pages...
June 13, 2014

algebra
cube labeled 1 to 6 rolls 450 times. predict rolling less than 3
June 13, 2014

algebra 2
Maria created a graph of B(t), the temperature over time. For the interval between t = 3 and t = 7, the average rate of change in her graph of B(t) is 8. Which statement must be true?
June 13, 2014

physics
A car of mass 537 kg is moving 32.0° North of East at a speed of 22.7 m/s. What is the magnitude of the momentum of the car? (magnitude - how big is it? ignore direction)
June 13, 2014

Statistics
1-P(B|A) =1-P(B∩A)/P(A) =( P(A)-P(B∩A) ) / P(A) =P(A\B)/P(A) P(B'|A) =P(B'∩A)/P(A) =P(A\B)/P(A) So yes, they are equivalent. =
June 13, 2014

College Algebra
A quadratic function has its vertex at the point (-9,8). The function passes through the point (9,4). When written in vertex form, the function is f(x)= a(x-h)^2 +k, where a) h)-9 k)8 4=a(9)^2+8 4=a(9+9)^2+8 4=a(18)^2+8 4=a(332) a=0.01204 I was able to find both h & k. but the...
June 12, 2014

College Algebra
The graph of a quadratic function f(x) is shown above. It has a vertex at (-2,4) and passes the point (0,2). Find the quadratic function y=a(x-(-2))^2+4 y=a(x+2)+4 2=a(x+2)+4 -4 -4 -2=a(0+2)/2 -1+ a function -1(x+2)+4 ? Im not sure where Im going wrong but my answer was ...
June 12, 2014

physics
The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 360 N, L = 5.25 m and h = 3.25 m.) (a) Find the magnitude of the force of friction between the wall and the strut. (b) Find the normal force exerted by...
June 12, 2014

physics
(a) Find the force P that must be applied to a piston of area 10.60 cm2 to produce sufficient fluid pressure to support a car weighing 12,101 N by means of a column of fluid of cross sectional area 285 cm2 as seen in the figure below. F1/A1=F2/A2 F1=F2*A1/A2 12101*10.6/285 =...
June 12, 2014

Science
What is a stimulus?
June 12, 2014

MATH
what is the integration of x . e ^(-x) ? Can you please explain it :) Thanks
June 12, 2014

MATH
integration of e^(lambda.x) = ?
June 12, 2014

Math
8\7=[8\. +)
June 12, 2014

Physics
A 7.50 kg bowling ball strikes a stationary 4.50 kg bowling ball. After the collision, the 4.50 kg ball is traveling 8.50 m/s 30.0° east of north; the 7.50 kg ball is traveling 6.50 m/s 20.0° south of east. What was the initial velocity (magnitude and direction) of the...
June 12, 2014

whole number
At the end of the year, a library reported 32 books lost or stolen, and 24 books were sent out for repair. If the library originally had 1,219 books, how many were left on the shelves or in circulation?
June 12, 2014

Physics
Three resistors of value 1.0 , 2.0 and 4.0 are connected in a parallel circuit with a 6.0 V battery. a) What is the total equivalent resistance? b) What is the across each resistor? c) The power delivered to the 4.0 resistor?
June 12, 2014

Physics
3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors?
June 12, 2014

physics
A 200 – W computer power supply is on 10 hours per day. If the cost of electricity is $0.15/kWh, what is the cost (to the nearest dollar) to run the computer every day for a year (365 days)? June 12, 2014 science-chemistry 4.35*10^-2 June 12, 2014 ALgebra 1500x June 12, 2014 math Jacqueline Strauss, a 25- year- old personal loan officer at Second National Bank, under-stands the importance of starting early when it comes to saving for retirement. She has committed$ 3,000 per year for her retirement fund and assumes that she’ll retire at age 65. a...
June 12, 2014

math
A hallway measuring 90 feet x 7 feet requires 1/2 a fluid ounce of cleaning solution per square foot. How much cleaning solution is required to clean the hallway
June 11, 2014

English
I was wondering for ninth grade, how long should an essay on 3 of Katherina (from taming of the shrew )characteristic be. And how long should each paragraph be.. Mine is not as long as my friends so I was wondering
June 11, 2014

algebra
A pound of tin is worth $2 more than a pound of copper. Three pounds of tin are mixed with 7 pounds of copper to make bronze that sells for$3.85 per pound. How much is a pound of tin worth
June 11, 2014

Math
How would I find the derivative of (8x^3)/sqrt(3x-2)?
June 11, 2014

trig
how do you find algebraically the measure of the obtuse angle, to the nearest degree, that satisfies the equation 3 sec theta = 5 is it sec theta = 5/3 and then cos -1 (5/8) = 0.4
June 11, 2014

Science
What is the difference between conserving energy and energy efficiency? What are 5 benefits of conserving energy?
June 11, 2014

math
infinity / 8 = ?
June 11, 2014

Distribution and warehousing
The risk of distribution of goods and materials are: -Sudden scarcity of raw materials. -Rising costs due to increased demand from competitors. -Political events, such as revolutions or transportation worker strikes that may slow delivery of raw materials.
June 11, 2014

Math
If (a + b / 10) = (a - 0.1b^2 / a - b), what is the value of a? F. 0.001 G. 0.1 H. 1 J. 10 K. 100
June 11, 2014

pueblo
In ƒ¢ABC, if the lengths of sides a and c are 8 centimeters and 16 centimeters, respectively, and the measure of ÚC is 35‹, what is the measure of ÚA to two decimal places?
June 11, 2014

physics
A body is to be projected at an angle with a velocity 24m/s just to pass over an obstacle 14m high at adistance of24m.then angle is what.
June 11, 2014

physics
The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 360 N, L = 5.25 m and h = 3.25 m.) (a) Find the magnitude of the force of friction between the wall and the strut. Correct: Your answer is correct. (b...
June 11, 2014

Chemistry
what is the mass of nh4cl that must dissolve in 100. grams of h2o to produce a saturated solution at 70 degrees celsius
June 11, 2014

chemistry
if an excess of nitrogen is reacted with 3.41 g of hydrogen, how many grams of ammonia can be produced?
June 11, 2014

physics
A motorist is driving at a constant velocity of 28 m/s when he decides to pass a car that is in front of him. He accelerates at a rate of 2.5 m/s2 for 3.0 seconds while passing the car. What is his velocity at the end of the 3.0 seconds?
June 11, 2014

physics
A student drops an object from a fourth floor window. The velocity of the object is measured at 29.28 m/s 3.0 seconds later. What is the acceleration of the object?
June 11, 2014

What does it mean when .... Bill clinton lifted the ban on gay in the military. Does he support gay or not? Am I a poor reader, since I cannot understand this? Please be honest..
June 10, 2014

STAT
n a planned study, there is a known population with a normal disrubution, \mu= 0, and \sigma=10. What is the predicted effect size (d) if the researchers predict that those given an experimental treatment have a mean of (a) -8, (b) -5, (c) -2, (d) 0, and (e) 10 ? For each part...
June 10, 2014

history
what is a POST RACIAL SOCIETY Do we live in one? What would one look like if we do not currently exist in one? Will we (should we) as Americans ever live in a POST RACIAL SOCIETY?
June 10, 2014

Physics
I thnk d Tension wil b T=ma+mg..m=max of load.ah may b wrong 2)force of aircraft,F=ma...
June 10, 2014

Physics
A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert backward on the snow to ...
June 10, 2014

Physics
Thank You
June 10, 2014

Physics
(a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point...
June 10, 2014

Physics
A spring with a force constant 0f 2.50 kN/M is set upright, and a wood platform of negligible weight is fastened to its upper end. A 2.50 kg mass is gently placed on the platform and released. How far does the spring compress? What is the final equilibrium position?
June 10, 2014

physics
(a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point...
June 10, 2014

Math
Who is your math teacher? I have Mr.Ryan:)
June 10, 2014

Math
I am guessing you Go to Connections academy. if so, please respond. Here is how you do it. X|1 hr|2 hr|3 hr|4 hr| --------------------- 300 c|?c | ?c | ?c | function is easy multiply each hour by the number of possible calories to be burned. C=X*300 Hope this helped
June 10, 2014

maths
140 / 2 = ? ? - 20 = ? Answers 140 / 2 = 70 70 - 20 = 50 Girls=50 Boys= 90
June 10, 2014

Languege arts book responce Walk Two Moons
Do you agree or disagree with Gramps' decision to let Sal drive by herself to Lewiston? How might the consequences of that choice be different if Gramps had made another decision? Take a position and use examples from the novel to support your choice.
June 10, 2014

Languege arts book responce Walk Two Moons
Thank you Gaylee, but can you tell me which chapter to look in?
June 10, 2014

Languege arts book responce Walk Two Moons
this is a question for those who have read the book Walk two Moons.If you read the book, then you might be able to help. For those, answering, please answer in 5 or more scentances
June 10, 2014

Languege arts book responce Walk Two Moons
Do you agree or disagree with Gramps' decision to let Sal drive by herself to Lewiston? How might the consequences of that choice be different if Gramps had made another decision? Take a position and use examples from the novel to support your choice. Do you agree or ...
June 10, 2014

world history
June 10, 2014

math
0.84M
June 10, 2014

physics!
a 4.0 kg object has a velocity of 4.0 m/s headed east. an explosion causes it to break up into two smaller 2.0 kg objects. if one of the objects has a velocity of 3.0 m/s at an angle of 30 degrees east of north, what is the velocity of the other object after the explosion
June 10, 2014

physics
An object of mass 5.0 kg is attached to a string of length 2.0 m and rotating in a horizontal circle with an angular velocity of 3.0 rad/s. What is the angular momentum of the object?
June 10, 2014

Civics
In The Wealth of Nations, Adam Smith mentions that very good grapes could be grown in Scotland. However, growing high quality grapdes in Scotland would be about 30 times as expensive as purchasing grapes from foreign countries. Some nations are better than other at producing ...
June 10, 2014

Physics
A toy gun uses a spring with a force constant of 300. N/m to propel a 10.0-g steel ball. If the spring is compressed 7.00 cm and friction is negligible: (a) How much force is needed to compress the spring? (b) To what maximum height can the ball be shot? (c) At what angles ...
June 10, 2014

Physics
A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert backward on the snow to ...
June 10, 2014

Physics
. (a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting ...
June 10, 2014

Physics
A spring with a force constant 0f 2.50 kN/M is set upright, and a wood platform of negligible weight is fastened to its upper end. A 2.50 kg mass is gently placed on the platform and released. How far does the spring compress? What is the final equilibrium position?
June 10, 2014

Civics
When the U.S. enbassy in Iran was invaded and more than 50 Americans were taken hostage, how did the United States respond? -The Senate declared war on Iran and President Carter ordered troops to invade the country. -The United States chose to isolate itself and not get ...
June 10, 2014

maths
how do you decide how many boxes to draw when you split an amount of money using ratio?
June 10, 2014

math
About how tall is a tower i f the angle of depression from its top to a point 75 metres from the base is 62 degrees?
June 10, 2014

Civics
I apologize for the error in my question. It's "socialist direct democracy" which would directly influence the economy. Thoughts Ms. Sue??
June 10, 2014

Civics
Would it be possible to have a social direct democracy? -No, in a socialist society only a few high-ranking member of the communist party have political power. -No, a direct democracy requires a free market economy which is not socialist. -Yes, if everyone voted on economic ...
June 10, 2014

calculus
A parabola ,f, intersect the x axis at A and B and the y axis at C. The axis of symmetry of the parabola has the equation x=-3.The line through A and C has the equation g(x)=x+7. Determine the coordinates of A,B and C
June 10, 2014

physics
A skateboarder, with an initial speed of 4.2m/s , rolls virtually friction free down a straight incline of length 16m in 3.3 s.
June 10, 2014

From a hot air balloon, Sean looks through an angle of depression of 35 degrees to see LeAnn on the on the ground. If Sean and LeAnn are 500 ft. apart by the line of sight distance, to the nearest foot, how far is Sean off the ground? I used 500(cos55)
June 9, 2014

Precalculus
Records from the buzz sawmill show that workers have 0.03 probability of losing a leg and a 0.04 probability of losing an arm in any one year. Armand leg casualty insurance company plans to offer insurance policies for the workers. The company will pay \$300 fir the loss of an ...
June 9, 2014

social studies help
Japanese American internment during World War II
June 9, 2014

social studies help
List 4 instances where the United States have paid reparations and note what positive impacts (if any)  these payments have made regarding American racial politics.
June 9, 2014

history
Explain Japanese internment and what (if any) role that period plays in the racial politics and interaction of modern Americans.
June 9, 2014

trigonometry
An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. To the nearest degree what is the angle of elevation of the airplane’s path?
June 9, 2014

***i have to answer interviewing questions for my homework. Im stuck on how to answer them. Its just practice and can be general. What is the most difficult part of the job? What types of challenges would I face in this position/department?
June 9, 2014

Physics
. A weightlifter lifts a 76.0 kg barbell 2.60 m 20 times in 1.50 minutes. What is his power output (a) in watts and (b) in hp?
June 9, 2014

math.
Solve the double inequality 0<(x+3)/2<5
June 9, 2014

math helpppp !
Solve the equation and check soultion 2(13t-15)+3(t-19)=0
June 9, 2014

physics
A child drops a ball from a height of 10 m. Assume its acceleration increases uniformly at the rate of 10m/s2. find the velocity with which the ball strikes the ground. Find the time taken to the ball reach the ground.
June 9, 2014

equation
10 triples every two months
June 9, 2014

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