Monday

December 22, 2014

December 22, 2014

Total # Posts: 2,142

**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.
*June 17, 2011*

**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.
*June 16, 2011*

**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?
*June 14, 2011*

**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?
*June 14, 2011*

**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
*June 12, 2011*

**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 ...
*June 10, 2011*

**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
*June 10, 2011*

**english**

I have Justin and Sara, tree, she, Our, and time....hope at leasst some are correct
*June 10, 2011*

**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 ...
*June 10, 2011*

**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
*June 8, 2011*

**College physics**

The weight of the airplane is 5.54*10^4
*June 6, 2011*

**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?
*June 6, 2011*

**trig**

please help. show step by step how to solve h(x)=2 cot(x/2) Identify period identify x-intercepts identify asymptotes
*June 5, 2011*

**businesscommunication**

A. Background information, negative elements, main idea(s), goodwill ending, benefits.
*June 4, 2011*

**Good Reads? 6th and 7th grade**

Walk two Moons Absolutely Normal Chaos Hunger Games Series the grimm leagacy Dork Diaries
*May 24, 2011*

**trig**

Use a graph of the cosecant function to find the value of theta for which csc theta equals 1.
*May 17, 2011*

**Chemistry**

6/4 = 21.3/x solve for x.
*May 16, 2011*

**algebra**

10w+55=15w+20 -10w -10w 55=5w+20 -20 -20 35=5w /5 /5 7=w
*May 16, 2011*

**math**

sin a= 46/65
*May 11, 2011*

**Tips**

thanks
*May 11, 2011*

**Tips**

What are some tips for writing a book?
*May 11, 2011*

**Writing**

Thanks.
*May 11, 2011*

**Writing**

How do you mark thoughts in writing?
*May 11, 2011*

**MATH**

Can you give an example?
*May 10, 2011*

**College Algebra**

Change 2x^2-5x=25 to standard form. Then find the solution set.
*May 5, 2011*

**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.
*May 4, 2011*

**Chemistry--Solids**

Silicon carbide forms which type of solid? molecular network ion-ion metallic THANKS!
*May 4, 2011*

**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
*May 3, 2011*

**calculus**

use substitution to find the indefinite integral (x^3+3x)(x^4+6x^2+8)^9dx
*May 2, 2011*

**math**

next three terms 1,5,13,29
*May 2, 2011*

**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
*May 2, 2011*

**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?
*May 2, 2011*

**Math**

the number has four digits the thousandsdidit is twice the hundreds digit the ones digit is divisible by 5 the sum is 13
*April 27, 2011*

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

Peasra
*April 26, 2011*

**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?
*April 25, 2011*

**math **

Im confused please help me!:<
*April 25, 2011*

**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!
*April 25, 2011*

**math**

a sudden rise in the crime rate.
*April 25, 2011*

**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?
*April 25, 2011*

**Statistics**

With a data set that is so small, the true value of the distribution cannot be seen with a histogram.
*April 8, 2011*

**japanese**

how do you say congratulations in japanese
*April 8, 2011*

**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
*April 8, 2011*

**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)
*April 8, 2011*

**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 ...
*April 4, 2011*

**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
*April 4, 2011*

**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?
*April 3, 2011*

**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 ...
*April 2, 2011*

**Early Childhood Education**

B.preschoolers
*April 2, 2011*

**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?
*April 2, 2011*

**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 ...
*March 29, 2011*

**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 ...
*March 29, 2011*

**chemistry**

what is the molarity of the Cl- ions at the stoichiometric point
*March 27, 2011*

**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 ...
*March 26, 2011*

**History**

peto a dis website a stupido
*March 23, 2011*

**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 ...
*March 22, 2011*

**AN UNCERTAIN HORIZON**

A. stalin
*March 17, 2011*

**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,...
*March 14, 2011*

**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
*March 9, 2011*

**basics and tools of floral design**

a pick machine affixes a
*March 9, 2011*

**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 ...
*March 8, 2011*

**foundation of personal finance**

did the recommendation change the way you previously thought about buying vs leasing a car?
*March 6, 2011*

**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?
*March 5, 2011*

**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?
*March 5, 2011*

**precalculus**

nope their both wrong.
*March 3, 2011*

**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 ...
*March 3, 2011*

**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...
*March 1, 2011*

**math**

i can't solve for X , it's confusing...
*March 1, 2011*

**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
*March 1, 2011*

**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?
*March 1, 2011*

**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.
*February 28, 2011*

**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 ...
*February 27, 2011*

**Personal finance**

What amount would you have if you deposited $2,500.00 a year for 30 years at 8 percent (compounded annually)?
*February 22, 2011*

**Algrebra**

How do you write the rule for: y=3x+4 for x=8
*February 21, 2011*

**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 ...
*February 14, 2011*

**math-solving for x with e**

1.) e^(2x) - 3e^(x) - 4 = 0 2.) e^(1-2x) ((e^(3x+6) - e^(2x)) = 0
*February 13, 2011*

**chemistry**

what is the maximum percent yelid theoratically possible? can this value be atually be exceeded ? how do you account this?
*February 13, 2011*

**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 ...
*February 10, 2011*

**math**

6/cube root of 4x
*February 2, 2011*

**childcare**

1c 2b 3d 4c 5a 6c 7d 8b 9a 10c 11a 12a 13c 14b 15c
*February 1, 2011*

**personal finance**

if the sales price of the pants is $26.25, what will joans total cost be after paying a 8% sales tax?
*January 31, 2011*

**Calculus**

Find the exact area below the curve (1-x)*x^9 and above the x axis
*January 31, 2011*

**Algebra 2/Trig**

I see where the extra step was! Thanks so much!
*January 30, 2011*

**Algebra 2/Trig**

We just started logarithms and exponential functions, and I'm kind of getting the gist but not really. Here is what I tried on one of the homework problems: 2^X=4^X+1 1)2^X=(2^2)^X+1 2)x=x+1 3)0=1 or no solutions I wasn't sure what to do between steps 1 and 2. Thanks!!
*January 30, 2011*

**Opinion Question**

What constitutes a miracle? (In your oppinion) I have to write a paper on this and needed some ideas.
*January 30, 2011*

**HEALTH CARE COMMUNICATION STRATEGIES **

Traditionally healthcare organizations have been based on the bureaucratic model. In what ways has the bureaucratic model enhanced healthcare communication? In what ways has it been a detriment? Would you recommend a different model to improve communication? What model would ...
*January 29, 2011*

**Science**

How many liters of carbon monoxide at STP are in 3.85 x 10^24 molecules of carbon monoxide?
*January 29, 2011*

**chemistry**

convert 4.37 moles of NaOH to grams.
*January 27, 2011*

**Finite Math**

Assume that you have a total of 15 people on the committee: 5 black males, 5 black females, 1 white male, and 4 white females. Party rules require that at least one black and at least one female hold one of the three offices. In how many ways can the officers be chosen while ...
*January 26, 2011*

**Math**

Select three (3) coins, but assume that there are 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?
*January 26, 2011*

**Math**

For this problem, assume the balls in the box are numbered 1 through 8, and that an experiment consists of randomly selecting 2 balls one after another without replacement. What probability should be assigned to the event that at least one ball has an odd number?
*January 26, 2011*

**Maths**

What length will have a canvas has the inside of a swimming pool if the diameter of the swimming pool is 5,5 m
*January 26, 2011*

**math**

verify that f and g are inverse functions. f(x) = 5x^2 x>(or equal too)0 g(x)= (x+2/5)^1/2
*January 26, 2011*

**math **

Let g(x)=2x-7 and h(x)=x+4/3. Perform the indicated operation and state the domain.
*January 24, 2011*

**math**

h(x) = x-2/5 find the indicated value of h(h(-4))
*January 24, 2011*

**math**

would it be 5 third root 6?
*January 20, 2011*

**math**

5 third root 48 - third root 750
*January 20, 2011*

**ETH 125**

Sorry about the mutiple postings. It kept saying I had a web address which I didn't. I left out a few lines because of it.
*January 20, 2011*

**ETH 125**

Hispanics coming across the border will look to their family members in Wichita Falls for a place to live and help them find a job. Wichita Falls is home to Sheppard Air Force Base, which is the US Air Force’s largest technical training operation and NATO pilot training ...
*January 20, 2011*

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