Friday

April 18, 2014

April 18, 2014

Total # Posts: 1,659

**physical science**

A lever is used to lift a heavy load. When a 50 N force pushes one end of the lever down 1.2m the load rises .2m. Show the weight of the load is 300N ADVANTAGE of lever is input/output = 1.2/.2 = 6 W=FD W=50N*6 (b/c of advantage) = 300N

**algebra**

Input:1,2,3,4,5 output:3,5,9,17,33 what is the rule?

**algebra**

the diagonal of a rectangular room is 13ft long. one wall measures 7ft longer than the adjacent wall. what are the dimensions of the room

**chemistry**

A 20 gram piece of metal is added to a sample of 100 grams of water inside a calorimeter. If the metal is at a temperature of 125° Celsius and the water is at 20° Celsius, which of the following best describes what will occur inside the calorimeter?

**SCHOOL**

SOLVE USING ADDITION AND MULTIPLICATION PRINCIPLE 6X-7<-25

**algebra 2**

If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant?

**statistics**

Assume that 90% of the general population is right-handed. Suppose that 100 students are randomly selected. what is the probability that 84% or more is right handed

**business communications**

I believe it is A.

**physics**

Two charged dust particles exert a force of 5.3 x 10^-2 N on each other. What will be the force if they are moved so they are only one-ninth as far apart?

**American Gov**

Thank you D was correct :)

**American Gov**

The highest priority for most members of congress: A)ensuring that the constitutional system of checks and balances works properly. B)supporting his or her party's legislative platform C)getting reelected D)gaining a reputation among other members of congress as an effecti...

**American Gov**

Awesome thanks!

**American Gov**

The major function of Congress: A)is to check the president B)is to inform the people C)is to enact legislation D)is to check the Supreme Court Is C the correct answer?

**American Government**

Question about American party organizations: A. are about to die out B. Are more powerful today than any time in history C. are still, important but their role in campaigns is secondary to that of candidates D. are unimportant in the political system today Is this answer corre...

**World History**

Ok So I redid them and got the following answers. 1. B 2. C 3. D 4. A 5. B 6. C 7. ? 8. ? 9. ? 10. B 11. C 12. D 13. A 14. C 15. A 16. C 17. B 18. D 19. D 20. A I can't seem to find the answers for 7,8,and 9....

**World History**

Thank You. I will look over the other answers and try to correct them.

**World History**

1. Among early hunting and gathering peoples, the commonly occurring mark that looks like a "P" is thought to stand for a A. favored animal B. woman. C. powerful male leader. (my answer) D. symbol for a calendar. 2. Charles Darwin supported the theory that agricultur...

**Algebra 2**

Factor x^3-5x^2-50x/x^4+10x^3

**Algebra 2**

Simplify: 1/xy + 1/yz + 1/xz

**math**

A basketball player has a 40% shooting average from the free-throw line. If she takes two free throws, estimate the probability that she will make both of them. Use the following list of digits which was taken from a table of random numbers. Let the digits 0-3 represent a made...

**Chemistry**

Please help me with the following question: Consider the following ion; XF2-2 What is the oxidation number assigned to element “X”? Show your work I'm having trouble writing the steps.

**math**

In 2000,the population of Arizona was 5 million and growing continuously at a rate of 3.1% per year. Write a function f that models Arizona's population in millions x years after 2000.

**physics**

A man leaves his front door, walks 440 m east and 380 m north, stopping at the edge of a cliff. He then takes a penny from his pocket and drops it from the cliff, which is 20 m high. What is the magnitude of the displacement (in meters) of the penny?

**Physics **

A child sits on the edge of a spinning merry-go-round that has a radius of 1.5 m. The childs speed is 2 m/s. What is the Child's acceleration?

**chemistry**

How many mL of a 4.7 M HNO3(aq) solution are required to make 500 mL of a solution with pH=2.10

**math**

18. A farmer planted a field of BT 123 corn and wants to estimate the yield in terms of bushel per acres. He counts 22 ears in 1/100 of acres. He determines that each ear has 700 kernels on average. He also knows that a bushel contains about 90,000 kernels on average. What is ...

**english**

Also another sentence was Bart, Mike, and Jim went bowling. I thought the simple subject might be Bart, Mike and Jim...but not sure

**english**

I have Justin and Sara, tree, she, Our, and time....hope at leasst some are correct

**english**

What would be the simple subject of the following sentences? Justin and Sara like to go hiking in the Rocky Mountains? This is the strangest looking tree I've ever seen! While hiding her anger as well as she could, Cindy handed the gift back to Bill. Our favorite campsite ...

**math**

katie makes 70% of her shots from the free throw line . can you determine how many consecutive free throws she must make in order to increase her precent. explain

**College physics**

The weight of the airplane is 5.54*10^4

**College physics**

An airplane is cruising along in a horizontal level flight at a constant velocity, heading due west. (a) If the weight of the plane is 5.54 104 N, what is the net force on the plane? (b) With what force does the air push upward on the plane?

**trig**

please help. show step by step how to solve h(x)=2 cot(x/2) Identify period identify x-intercepts identify asymptotes

**businesscommunication**

A. Background information, negative elements, main idea(s), goodwill ending, benefits.

**trig**

Use a graph of the cosecant function to find the value of theta for which csc theta equals 1.

**Chemistry**

6/4 = 21.3/x solve for x.

**algebra**

10w+55=15w+20 -10w -10w 55=5w+20 -20 -20 35=5w /5 /5 7=w

**math**

sin a= 46/65

**Tips**

thanks

**Tips**

What are some tips for writing a book?

**Writing**

Thanks.

**Writing**

How do you mark thoughts in writing?

**MATH**

Can you give an example?

**College Algebra**

Change 2x^2-5x=25 to standard form. Then find the solution set.

**precalculus**

A Ferris wheel has a radius of 35 feet, and is rotating at 5 revolutions per minute. Find the linear speed, in feet per minute, of a seat on the Ferris wheel.

**Chemistry--Solids**

Silicon carbide forms which type of solid? molecular network ion-ion metallic THANKS!

**Chemistry!!!**

Calculate the density of a certain gas if its pressure is 0.725 atm, its molar mass is 48.22 g/mol, and the temperature of the has is 24.0 degrees Celsius

**calculus**

use substitution to find the indefinite integral (x^3+3x)(x^4+6x^2+8)^9dx

**math**

next three terms 1,5,13,29

**chemistry**

500 grams of water at 0 degrees C was heated to a boiling in a large pot. how much energy was needed? what was the temperature change and Heat energy

**Chemistry**

If 16.5 g of oxygen gas is required to inflate a balloon to a certain Volume at 26.5 degrees Celcius, what mass of oxygen gas is required to inflate the same balloon to the same volume and pressure at 10.0 degrees Celcius?

**Math**

the number has four digits the thousandsdidit is twice the hundreds digit the ones digit is divisible by 5 the sum is 13

**I need help to unscramble these words in spanish**

Peasra

**math **

at the end of five days i saved 30$. if each day i saved 2$ mre then the day before, how much money did i save?

**math **

Im confused please help me!:<

**math **

HI I need help with mixed numbers! I used to know how to do them. but now I fogot!I was in sping break so yeah.please help what should i do!

**math**

a sudden rise in the crime rate.

**Calculus**

A ostrich farmer wants to enclose a rectangular area and then divide it into four pens with fencing parallel to one side of the rectangle (see the figure below). He has 820 feet of fencing available to complete the job. What is the largest possible total area of the four pens?

**Statistics**

With a data set that is so small, the true value of the distribution cannot be seen with a histogram.

**japanese**

how do you say congratulations in japanese

**math**

at noon two planes leave at 3,377mi apart and are coming toward each other at a parallel line if one travels at 610mph and the other 618mph how long will it take to reach each other

**math**

formula of a cylinder is :2 times pi times the radius times the height plus 2 times pi times the radius to the second power Example:cylinder w/the height of 10mm and the base is 4mm is 2(3.14)(4)(10)+2(3.14)(16)

**Statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of in...

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3

**Calculus**

The base of a solid is the region bounded by the parabola y^2=4x and the line x=2. Each plane section is perpendicular to the x-axis is a square. What id the volume of the square?

**Social Studies/World History**

hi I was doing a study guide for a big test I'm having in my World History class and I was wondering if anyone can help me answer this question... -what trends in political organization and economic development can be identified in 20th century world civilizations? I was l...

**Geometry**

The scale factor of two similar triangles is 2/5. if the perimeter of the small triangles is 80 cm, what is the perimeter of the large triangle?

**prob/stats**

Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of $270. We randomly select 140 bills from the population of all bills charged for this surgery. Let represent the average amount ...

**prob/stats**

Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of $270. We randomly select 140 bills from the population of all bills charged for this surgery. Let represent the average amount ...

**chemistry**

what is the molarity of the Cl- ions at the stoichiometric point

**BUS 210**

Content and Development 170 Points Points Earned XX/170 Additional Comments: The student covers all key elements of the assignment in a substantive way. · Reviews the three business problems identified in Week Six paper · Develops technology solutions to the iden...

**physics**

When you push a 1.55 kg book resting on a tabletop it takes 2.10 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between the book and the tablet...

**AN UNCERTAIN HORIZON**

A. stalin

**economics**

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: Price Quantity $ 6,000 5,500 5,000 6,500 4,000 7,500 3,000 8,500 2,00...

**physics**

The drawing shows a version of the loop-the-loop trick for a small car. If the car is given an initial speed of 4.6 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times

**basics and tools of floral design**

a pick machine affixes a

**Physics**

An old car is traveling down a long, straight, dry road at 25.0 m/s when the driver slams on the brakes, locking the wheels. The car comes to a complete stop after sliding 305 m in a straight line. If the car has a mass of 755 kg, what is the coefficient of kinetic friction be...

**foundation of personal finance**

did the recommendation change the way you previously thought about buying vs leasing a car?

**investment and real estate analysis**

A 9-year bond has a yield of 6.0% and a duration of 7.982 years. If the market yield changes by 35 basis points, what is the percentage change in the bond’s price?

**Science**

How many calories of heat are needed to raise the temperature of 10 grams of water from 10 degrees Celsius to 20 degrees Celsius?

**precalculus**

nope their both wrong.

**precalculus**

The earth's atmospheric pressure, P, in terms of height above sea level is often modeled by an exponential decay function. The pressure at sea level is 1013 millibars and the pressure decreases by 14% for every kilometer above sea level. (a) What is the atmospheric pressur...

**Physics**

Please Help! An object at 20 degrees Celsius with heat capacity 100 calories/Celsius is placed in 40 grams of water at 100 degrees Celsius. After equilibrium is reached, the object is removed from the hot water and placed in 200 grams of water at 0 degrees Celsius. What is the...

**math**

i can't solve for X , it's confusing...

**mathematics**

write a rule for nth term: 1/10, 3/20, 5/30, 7/40,.... i think the next term is 9/50 but i dont know how i got that

**Physics**

Please help! suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

**Calc**

The temperature at any point in the plane is given by the function T(x,y)=100/(x^2+y^2+1). Find the direction of the greatest increase in temperature at the point (3,2). What is the magnitude of the greatest increase? Could someone help me with this, please? Thanks.

**Chemistry**

Please help me with these! Thanks :) Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a 45.0 percent by mass ...

**Personal finance**

What amount would you have if you deposited $2,500.00 a year for 30 years at 8 percent (compounded annually)?

**Algrebra**

How do you write the rule for: y=3x+4 for x=8

**world history**

I am sorry. I am taking the classes for Penn Foster also. But I have to agree with Mrs. Sue because If you need that much help maybe you should contact the school and tell them that you need help. I posted up for help on one question and posted up for somebody to check my answ...

**math-solving for x with e**

1.) e^(2x) - 3e^(x) - 4 = 0 2.) e^(1-2x) ((e^(3x+6) - e^(2x)) = 0

**chemistry**

what is the maximum percent yelid theoratically possible? can this value be atually be exceeded ? how do you account this?

**spanish**

Can someone check my work? Read the school rules listed below. In the the blanks write (P)profesor for realistic rules that were most likely written by teachers for their classrooms. Write (E)estudiante for improbable rules that were most likely submitted by students. P 1.Se p...

**Physics**

mh

**Math**

4

**math**

6/cube root of 4x

**childcare**

1c 2b 3d 4c 5a 6c 7d 8b 9a 10c 11a 12a 13c 14b 15c

**personal finance**

if the sales price of the pants is $26.25, what will joans total cost be after paying a 8% sales tax?

**Calculus**

Find the exact area below the curve (1-x)*x^9 and above the x axis

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