Friday

September 30, 2016
Total # Posts: 521

**chemistry**

The principal component of many kidney stones is calcium oxalate,CaC2O4. A kidney stone recovered from a typical patient contains 8.50×10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone?

*October 19, 2011*

**chemistry**

During a reaction, you see that the heat (q) given off is 3.8 calories. Knowing that you used a mass of 100 g and that the temperature change was 7.85°C, what is the specific heat of this reaction?

*October 12, 2011*

**Stats Question**

41. % of women in us consider reading a favorite past time randomly u ask 6 women if it is their favorite pastime what's the probability that 5 respond no

*October 9, 2011*

**Stat Help**

A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% if the true proportion. Find the sample necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas last year. If no ...

*October 6, 2011*

**Technology**

• Prepare a 1,400 to 1,750-word paper detailing how a new technology system should be implemented or introduced to a company. Include your recommendations as if you were the manager in charge of implementing the new technology. Give your ideas on how the following ...

*September 28, 2011*

**college physics**

Two children are playing on a 145-m-tall bridge. One child drops a rock (initial velocity zero) at t = 0.The other waits 1.4 s and then throws a rock downward with an initial speed v0.If the two rocks hit the ground at the same time, what is v0?

*September 27, 2011*

**Maths**

Who do you figure out the surface area of a cylinder

*September 27, 2011*

**physics**

A stone is dropped from the roof of a tall building. A person measures the speed of hte stone to be 49 m/s when it hits the ground. What is the height of the building?

*September 18, 2011*

**physics**

An electron travels 7.63 m in 7.33 × 10−8 s. How fast does it travel? Answer in units of cm/s

*September 17, 2011*

**Physics**

A cube has sides of length L = 0.170 m. It is placed with one corner at the origin as shown in the figure below. The electric field is not uniform but is given by = (-6.00 N/C · m)x + (2.00 N/C · m)z. (a) Find the electric flux through each of the six cube faces ...

*September 9, 2011*

**Spanish 1-Please check**

Thank you

*September 5, 2011*

**Spanish 1-Please check**

How do you say the class of economics and the class of anatomy in Spanish. I think it is la clase de economis y la clase anatomis. Accent should be over both (i's)

*September 5, 2011*

**Spanish**

I have an assignment to write the subject pronoun that you would use when addressing a person and then what pronoun you would use when talking about them. I am totally confused and cant find help in my text. looks like this: Don francisco Maite y Ines Ines y Alex la profesora ...

*August 30, 2011*

**math**

find the restrictions on the domain and range for: y=square root of 6-2x

*August 26, 2011*

**physics**

A person takes a trip, driving with a constant speed 94 km/h except for a 83 min rest stop. If the person's average speed is 70 km/h, how far is the trip? Answer in units of km

*August 24, 2011*

**physic**

Lai was driving north on Hwy 75 with a speed of 56.9 m/s when she heard on a CB that a patrolman was hiding 127.3 m north of where she is. Knowing that the patrolman can start clocking the car in 2.7 seconds, Lai decided to slow to 34.2 m/s. and immediately pressed on the ...

*August 24, 2011*

**Chemistry**

1. Consider the conductance meter and the titration method of determining the salt content of a brine sample. Discuss at least two advantages and two disadvantages of each method. 2. A corrosion technologist pipetted a 50.00 mL sample of an unknown brine and titrated it with ...

*July 1, 2011*

**alg 2**

A rectangular plot is 30 feet long and 20 feet wide. The area will be doubled by adding a strip at one end and another strip of the same width on one side. What would be the width of the strip?

*June 28, 2011*

**history**

Neanderthals lived alongside Homo sapiens for thousands of years

*May 23, 2011*

**world history**

Neanderthals lived alongside Homo sapiens for thousands of years,

*May 23, 2011*

**world history**

Earthquake activity didn't play a role in the collapse of _______ civilization

*May 23, 2011*

**business**

What are the 5 types of employment groups?

*May 18, 2011*

**Medical Billing and Coding**

You make is sound so easy... I will do just that thanks.

*May 7, 2011*

**Medical Billing and Coding**

Yes it did. I just don't know how to put it all together and make it look good.

*May 7, 2011*

**Medical Billing and Coding**

Special features (what does the program do) is the program easy to use is the program able to be networked between facilities security and confidentiality of the patients records pricing and cost technical support and troubleshooting services Minimal hardware requirements ...

*May 7, 2011*

**Medical Billing and Coding**

Can anyone please help me with the research paper in compairing three different electronic medical records. If any one can bref me on this that would be great. I have done all the research my problem is I can't find the things that need to be addressed. Anyones feed back ...

*May 7, 2011*

**algerbra**

the area of trianlge ABC is 20 square units. if abgle A=130 and b=6 find the value of c?

*April 19, 2011*

**physics**

The forces acting on the object are 45 n and 60 n acting in the same direction. The friction force between the bag and the floor is 15n. What is the net fore acting on the bag? What is the acceleration of the bag?

*April 11, 2011*

**Statistics**

If 95% of the population has a measured IQ score between 70 and 130, what is the probability of meeting a person with a measured IQ either higher than 130 or below 70?

*April 9, 2011*

**Chemistry**

sorry to be asking too much but how do we get the density of water?

*April 6, 2011*

**Chemistry**

for #1, we have to find the density first right? so density is mass/volume, so from there you take 381.676 and divide that by.. and thats where im lost :(

*April 6, 2011*

**Chemistry**

An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is rinsed and filled ...

*April 6, 2011*

**calculus**

That is what I came up with for my function. It just didn't seem to work out right when I went to solve. I will have to go back and check my math. Thank you for your help!!!

*April 3, 2011*

**calculus**

I am having difficulty coming up with the right function. The rest should fall into place, I know.

*April 3, 2011*

**calculus**

A company wants to bid on an order of 20,000 square based boxes which hold 5 cubic feet. The cardboard cost is $.15 per square foot. The boxes must be reinforced with an extra layer of cheaper cardboard on the bottom ($.12 per square foot). The box is held together with tape ...

*April 3, 2011*

**Geometry**

the area in a circle of each shaded region is given. Find x The given is 66 the angle is 180

*March 31, 2011*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)

*March 31, 2011*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)

*March 31, 2011*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)

*March 30, 2011*

**math**

justins gas tank is 1/3 full. after he buys 2 gallons of gas, it is 1/2 full. how many gallons can justins tank hold?

*March 30, 2011*

**science**

Why is sucrose covalent but have ionic like characteristics? I am so confused I am doing a lab and i have no idea!

*March 28, 2011*

**Math**

If you finance $50,000 of the purchase of your new home at 4.40% compounded monthly for 30 years, the monthly payment will be $250.38. If instead your had a rate of 4.80% compounded monthly for 15 years, the monthly payment will be $390.21. How much do you pay in total for the...

*March 27, 2011*

**Physics**

While watching ocean waves at the dock of the bay, Otis notices that 10 waves pass beneath him in 30 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency, wavelength, and speed of ...

*March 14, 2011*

**Calculus**

Find constants a and b in the equation f(x)= ax^b/(ln(x)) such that f(1/8)= 1 and the function has a local minimum at x= 1/8

*March 11, 2011*

**us history**

how did the events at chickamauga and chatanooga affect georgians

*March 8, 2011*

**Calculus**

derivative of y^2=x^2/(xy-4) at 4,2

*March 7, 2011*

**Geometry/trig**

How do I find the geometric mean between 12 and 2.4?

*March 3, 2011*

**Math**

Here is the question: Patty has a bag of 72 marbles. The ratio of green marbles to yellow marbles is 2 to 7. How many green marbles does patty have? I don't know how to answer it. Please help!

*March 2, 2011*

**geometry.**

in a scale drawing of a school's floor plan, 6 inches represents 100 feet. If the distance from one end of the main hallway to the other is 175 feet, find the corresponding length in the scale drawing.

*February 28, 2011*

**geometrY**

See the last picture at the bottom of this web page (for a pic of this exact problem). Using ratios, Tree height = T 15/66 = 6.33/T 15T = 512.73 T = 34.182 T = 34.182 when getting this answer from my question: to estimate the height of a tree, Dave stands in the shadow of the ...

*February 28, 2011*

**geometrY**

I think you did something wrong

*February 27, 2011*

**geometrY**

to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same point. Dave is 6 feet 4 inches tall and his shadow is 15 feet long. If he is standing 66 feet away from the tree, what is the height of this tree?

*February 27, 2011*

**geometry**

for that some problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. arn't you solving two parts because the board was cut in two?

*February 27, 2011*

**geometry**

but arn't you figuring 2 parts because its cut in two??

*February 27, 2011*

**geometry**

For that problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. when answering the question why was it 3/5=x/12? where did the 5 come from?

*February 27, 2011*

**geometry**

A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces.

*February 27, 2011*

**chemistry**

105 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.3, what is the mass of the steel bar?

*February 26, 2011*

**Maths**

How do you work out and show difference between 2 numbers i.e 60 students and 40 students out of 100

*February 16, 2011*

**Physics URGENT**

A tennis ball with a velocity of +10.7m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.9 m/s (to the left). If the ball is in contact with the wall for 0.009s, what is the average ...

*February 14, 2011*

**Physics URGENT**

A speeder passes a parked car at 35.0 m/s. The police car starts from rest with a uniform acceleration of 2.41 m/s^2. A.) How much time passes before the speeder is overtaken by the police car? B.) How far does the speeder get before being overtaken by the police car?

*February 14, 2011*

**Physics**

A range in a national park is driving at 47 km/h when a deer jumps onto the road 70m ahead of the vehicle . After a reaction of t seconds, the ranger applies the brakes to produce an acceleration of -2.00 m/s^2. What is the maximum reaction time allowed if the ranger is to ...

*February 14, 2011*

**Physics**

A small first aid kit is dropped by a rock climber who is descending steadily at 1.5 m/s. A.)After 3.1s, how far is the kit below the climber?

*February 14, 2011*

**algebra**

3x+4>9 3(2)+4>9 6+4>9 10>9 The value x=2 is a solution to the inequality. A value of x that would not be a solution would be any value lesser than 2, such as 1,0, or -1.

*February 14, 2011*

**math 8th please help**

First, find the total amount of students in the class. 10+15=25. There are 10 girls so the odds of choosing a girl are 10/25, reduced to be 2/5 There are 15 boys so the odds of choosing a boy are 15/25, reduced to be 3/5 The answers are 1. 2/5, or 2 out of 5 2. 3/5, or 3 out ...

*February 14, 2011*

**physics**

A plastic ball has a volume of 300 cm3 and a mass of 30 g. What fraction of the ball's volume will float above the surface of a lake of fresh water?

*February 13, 2011*

**Physics HELP ASAP PLEASE**

A hawk is flying horizontally at 10 m/s in a straight line 200m above the ground. A mouse it was carrying is released from its grasp. The hawk continues on its path at the same speed for two seconds before attempting to retrieve its prey. To accomplis the retrieval, it dives ...

*February 11, 2011*

**Pysichal Therapy Aide**

A PTA CAN ASK A SW TO HELP WITH ALL OF THE FOLLOWING EXCEPT: A. TO ASSES THE PATIENT'S HOME ENVIRONMENT AND INSTRUCT THE PATIENT AT DISCHARGE FROM THE HOSPITAL B. TO ARRANGE FOR HOME HEALTH SERVICES AT THE PATIENT DISCHARGED FROM THE HOSPITAL C. TO ARRANGE FOR MEALS-ON-...

*February 10, 2011*

**7th grade introduction/conclusion**

Okay, so: An intro should have a "hook," or something that grabs the reader. It should introduce the topic you're talking about. The conclusion should basically be like your intro, wording it differently and wrapping it up, adding an end statement which may be ...

*February 10, 2011*

**Physical therapy aide**

A pta can supervise a physical therapy aide to perform all of the following except

*February 9, 2011*

**Physics**

A 1000kg car accelerates from 3m/s East to 24m/s East at a rate of 3m/s. If the force of friction is 500N West; how much ower must the car exert? If heat and mechanical losses make the car only 60% efficient, what total power must be exerted to accomplish the acceleration in ...

*February 8, 2011*

**Physics**

A 60kg biker on a 20kg bike exerts 600W of power to accelerate from 1m/s to 9m/s in a distance of 40m. What is the force of friction acting on the bike and biker?

*February 8, 2011*

**Physics**

A stopped 100okg car exerts 160kW of power as it accelerate. If it is only 75% efficient, how far will it travel in 4 seconds?

*February 8, 2011*

**Chemistry**

Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

*February 1, 2011*

**math**

my credit card charges me 1.575% interest per month on my average daily balance this month. Average daily balance for Jan.$810. What interest will i pay for Jan.

*January 23, 2011*

**physics**

a stunt car driver testing the use of air bags drives a car at a constant speed of 25m/s for a total of 100 meters. he applies his brakes and accelerates uniformlu to a stop just as he reaches the wall 50 meters away. SKETCH THE A GRAPH SHOWING POSITION V.S TIME and VELOCITY v...

*January 20, 2011*

**physics**

The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 23.0 m/s at an angle of 58.5° above the ground, what is the "hang time"?

*January 16, 2011*

**reimbursement methodologies**

Nadya what is the exam number you are doing? what course are you taking? Melody yes I will email you....

*January 4, 2011*

**reimbursement methodologies**

Nadya which book from Penn Foster are you looking at? I think I can help you with thes problems.

*January 4, 2011*

**math**

A landscaping company is laying a triangular flower bed. The height of the trangle is 15ft. What lengths of the base will make the area at least 255ft squared?

*December 21, 2010*

**Math**

Describe a situation using proportions or ratios in a financial or geometric problem. describe the situation in detail and provide a problem to illistrate it. What is the importance of this calculation in this situation..

*December 17, 2010*

**adult education**

describe why it is important to consider each domain in the study of adult development, provide an example of how one domain of development impacts the other two.

*December 10, 2010*

**Maths**

How to work out the comparison 13 out of 39 as a percent

*December 8, 2010*

**MATH urgent!!!**

My problem: From 1992 to 1996, the annual income for all the private golf courses in the United States can be approximated by the model: I=59t^2+2254, where I is the annual income in millions of dollars and t is the year, with t=0 corresponding to 1990. 1. In which year did ...

*December 7, 2010*

**MATH**

The path of a large stone fired from a catapult can be modeled by y= -0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height of the stone. AND (...

*December 7, 2010*

**Math**

Please Help I am confused :)

*December 5, 2010*

**Math**

If P(B)=1/5 compute P(not B)? So I am thinking it may be P(not B)=0.2? Is this right?

*December 5, 2010*

**Math**

Ok so it would be P(B)=0.8, the probability that the grade is not a B.? I hope this is right now, if it isn't I give up....lol !

*December 5, 2010*

**Math**

Oh ok I think I get it, so P(B)=0.5, 1/2, and P(not B)=0.5,1/2??? Is that right?

*December 5, 2010*

**Math**

If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!

*December 5, 2010*

**math**

a country has 221 mobile cellular telephones per 250 inhabitants. if the country's population is about 2,800 how many mobile cellular telephones does the country have? in your own words, using complete sentences solve the problem

*December 4, 2010*

**math**

Thanks, L. I know - the "why" is a bit tricky, especially for 5th graders, and my daughter is well ahead of grade level. I think your answer will probably work well enough.

*December 1, 2010*

**math**

We figured that part out. The girl was given $3.58 in change. Why was the error made (this is part of the original question).

*December 1, 2010*

**math**

Hanna bought 4 pencils for $.09/each, two notebooks for $1.58 each, and one pack of paper for $3.17 each. She paid with $10 and got $3.58 in change. Is this amount correct, and if not, why? Just need the WHY part of the answer. The correct change should be $3.31

*December 1, 2010*

**child care**

which of the following is an obstacle to learning for a begininning mover? A.knowledge of what elements of the movement to focus on B.chronic indifference characteristics between birth and age three C.shorter time to monitor perceptual input from the visual system D.difficult ...

*November 30, 2010*

**child care**

which of the following is an obstacle to learning for a begininning mover?

*November 30, 2010*

**6th grade**

how do u change a ratio into a percent

*November 28, 2010*

**Confidentiality in Allied Health Essay**

Writeteacher can you delete this whole questions please. I will find all the information on my own thanks and have a good day!!

*November 28, 2010*

**Confidentiality in Allied Health Essay**

Can anyone help me find other resources to the graded project for Penn Foster? I have the AMA, and the Peen foster books. Anything else would be great.

*November 28, 2010*

**Algebra**

Thank You!

*November 24, 2010*