Wednesday

August 20, 2014

August 20, 2014

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**

What was Balaam's relationship to Yahweh according to the Book of Numbers 22-25? Please Help!
*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*

**Reading**

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**

D is the answer
*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*

**check answer**

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*

**Business **

***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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