Saturday

July 23, 2016
Total # Posts: 983

**Physics**

Your ear is capable of differentiating sounds that arrive at the ear just 1.00 ms apart. What is the minimum distance between two speakers that produce sounds that arrive at noticeably different times on a day when the speed of sound is 340 m/s?
*July 20, 2016*

**math**

Suppose you have a wallet with $5 bills, $10 bills, and $20 bills. If the probability of picking a $20 bill is 4/15, and the probability of piciing a $5 bill is 1/3, what is the probability of picking a $20 bill? a. 1/15 b. 1/5 c. 4/15 d. 2/5 **
*May 19, 2016*

**math**

Dina and Masha start out on a bike path 10 km long at the same time. When Dina reaches the end of the 10 km, Masha still has 2 km left to bike. If Dina’s biking speed is 5 km/h, find Masha’s biking speed.
*May 15, 2016*

**Math**

Write twenty million, five hundred ten thousand in expanded notation using exponents.
*May 4, 2016*

**life orientation**

Sexual abuse
*April 25, 2016*

**Chemistry**

I have a .01 M solution of N2, and the concentration of H2 in the same solution is .02. What is the Ksp.
*April 24, 2016*

**math**

A set of data items is normally distributed with a mean of 70. Convert the data item to a z-score, if the standard deviation is as given. data item: 80; standard deviation: 15
*April 17, 2016*

**Math**

suppose you have two prisms with the same volume. one is shaped like a cube and the other is "longer." which has the lesser surface area?
*April 9, 2016*

**Math**

Who were John Venns peers or any mathematicians working on the same thing as John during the same time as him?
*April 7, 2016*

**life orientation**

Sexual abuse and violence against women
*April 4, 2016*

**Math**

X is a normally distributed random variable with a mean of 8.00. If the probability that X is less than 9.54 is 0.67, then what is the standard deviation of X?
*April 2, 2016*

**Chemistry**

A sample of 0, 3220g of an ionic compound containing bromide ions (Br-) is dissolved in water and treated with excess of AgNO3. If the mass of the precipitate of AgBr formed is 0, 6964g, answer: a) what percentage of bromine in molar mass? b) Give the mass of bromine in the ...
*April 2, 2016*

**Chemistry**

A sample of 0, 3220g of an ionic compound containing bromide ions (Br-) is dissolved in water and treated with excess of AgNO3. If the mass of the precipitate of AgBr formed is 0, 6964g, answer: a) what percentage of bromine in molar mass? b) Give the mass of bromine in the ...
*April 2, 2016*

**Chemistry**

Thanks @DrBob222
*March 30, 2016*

**Chemistry**

Show how you would calculate the % yield of hydrogen if 40.0 grams of magnesium react with an excess of nitric acid producing 1.70 grams of hydrogen gas. Mg + 2 HNO3 ---> Mg(NO3)2 + H2
*March 30, 2016*

**Chemistry**

The network parameter of molybdenum 0.314 Valley nm and its density to 20° C 10.22 Valley g/cm3. Determine the crystalline structure of the molybdenum
*March 28, 2016*

**Simple Geography**

Thank you so much!!
*March 26, 2016*

**Simple Geography**

The provisions of the United Nations Conference of the Law of the Sea (UNCLOS) give coastal countries navigational and economic sovereignty over which of the following zones? A) 200-nautical-mile exclusive economic zone B) Export processing zone (EPZ) C) continental shelf D) ...
*March 26, 2016*

**Geography**

Thanks so much!!!!
*March 26, 2016*

**Geography**

I have a question regarding the answer. Is it geographical area because you can't adjust the population size?
*March 26, 2016*

**Geography**

Thank you so much!! You have no idea how much I appreciate your help!
*March 26, 2016*

**Simple Geography**

Is geographical area correct? Please help!
*March 26, 2016*

**Geography**

Whereas reapportionment adjusts the amount of political representation give to a certain geographical area, redistricting adjusts A) country, state and/or county boundaries. B) population size. C) the gerrymander. D) Federal lands. E) the geographical area. I think the answer ...
*March 26, 2016*

**Chemistry**

A rigid cylinder with a moveable piston contains 50.0 liters of a gas at 30c with a pressure at 1.00atm
*March 24, 2016*

**math**

A physics test has twenty questions worth 100 points. The test consists of true /false questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test ?
*March 17, 2016*

**math**

The amount of Sandy earns from babysitting is proportional to the number of hours she works. She earns 45 dollars is 6 hours. what is the hourly rate of Sandy`s earnings?
*March 9, 2016*

**Chemistry 1**

i found the answer thanks so much for your time if you have read this!.
*February 15, 2016*

**Chemistry 1**

i need help as quickly as possible because i am taking a summative practice test and this question i don't understand how to work it out. can you please explain? here is the question: Arrange the following in order of increasing oxidation number of the sulfur atoms in ...
*February 15, 2016*

**Mathematics **

Please correct me if my answer is wrong... thanks 1. 6(11-(3+1)^2+3) =-12 ------------------------------------ Here is my working out 6(11-(4)^2+3 6(11-16+3) 6(-5+3) 6(-2) -12
*February 10, 2016*

**math**

Thank you
*January 30, 2016*

**math**

The box plots below show the average daily temperatures in January and December for a U.S. city: two box plots shown. The top one is labeled January. Minimum at 0, Q1 at 10, median at 12, Q3 at 13, maximum at 16. The bottom box plot is labeled December. Minimum at 1, Q1 at 5, ...
*January 30, 2016*

**Math**

I need help on these two too
*January 29, 2016*

**English**

Formal schooling is basically when you get schooled through credital sources
*January 27, 2016*

**Biology**

What is an ecological footprint and why does Nothern Americans have such large ecological footprints?
*January 27, 2016*

**Biology**

What causes acid precipitation, and what are the negative effects of acid precipitation?
*January 27, 2016*

**Biology**

What's an ecological niche?
*January 27, 2016*

**Biology**

Define and give examples of predation, competition, and symbiosis.
*January 27, 2016*

**Biology**

What is the difference between endangered and extirpated?
*January 27, 2016*

**Biology**

What is the difference between tolerance range and optimum range in Biology?
*January 27, 2016*

**Biology**

What is an invasive specie, and what are some negative effects of an invasive species?
*January 27, 2016*

**Biology**

What is pesticide resistance? Why is it that biological control is a good solution to the problem of pesticide resistance?
*January 27, 2016*

**Biology**

What's the difference between Bio accumulation and Bio amplification?
*January 27, 2016*

**Biology**

How does Nutrients get affected from surface runoff in Biology? If in detail, you could explain what exactly is Surface Runoff, and what causes it, that'd be of great help !
*January 27, 2016*

**Re:BIOLOGY**

Whats the relation between Photosynthesis and Cellular Respiration? Is it, because they have complimentary proccesses?
*January 27, 2016*

**RE:Biodiversity**

Sorry I have a lot, final exams tommorow! Whats the relation between Photosynthesis and Cellular Respiration?
*January 27, 2016*

**Biology**

Also, sorry if I may ask a lot of questions, I am just preparing for my exam tomorrow.
*January 27, 2016*

**Biology**

Thanks Ms.Sue Don't worry
*January 27, 2016*

**Biology**

Okay sorry let me explaining properly, My question was which has more biodiversity, Natural Ecosystems or Artificial ecosystems? and I'm,sopposed to explain. I choose Natural but I guess I am wrong.
*January 27, 2016*

**Biology**

Wait, so are you saying that Artificial ecosystems actually has more biodiversity? Altho, they have been altered?
*January 27, 2016*

**Biology**

How do natural ecosystems have more biodiversity?
*January 27, 2016*

**math**

My cousin's car gets 32.81 miles per gallon. She only has 6 gallons left in her tank. How many more miles can the car last?
*January 14, 2016*

**Math**

Every two-digit number whose units digit is three times its tens digits
*December 23, 2015*

**Math**

Mark is building a custom wooden frame around his flower bed.The length of the frame is 5.45 feet, and the width of the frame is3.275 feet. What is the area of the flower bed without rounding?_________square feet
*December 12, 2015*

**US Legal system and branches of government**

private law is a branch of the law that deals with the relations between individuals or institutions.
*November 20, 2015*

**US Legal system and branches of government**

i dont understand it
*November 20, 2015*

**US Legal system and branches of government**

consider the defination of private law and public law. Discuss the difference between these two sources of law. support with example.
*November 20, 2015*

**US Legal system and branches of government**

write 200 word on the three executive offices which affect the health information profession.
*November 20, 2015*

**math**

What two numbers have a product of 3.6 and a sum of 3.8
*November 9, 2015*

**Math**

The sum of two numbers is 48. One number is 24 more than the other number. Find the numbers. My thinking is X=48-24. X=24
*November 5, 2015*

**math**

the 6:00 a.m. temperatures for four consecutive days in the town of lincon were -12.1 c, -7.8 c, -14.3 c, and -7.2 c. what was the average 6:00 a.m. temperature for the four days?
*October 20, 2015*

**Science**

Thanks for the help!
*October 7, 2015*

**Georgia State History**

Which of the following does not describe part of the Intolerable Acts? Boston's port was closed. There was a tax on molasses. There were limited town meetings. Colonists had to quarter British soldiers in their homes. ** Even if my answer is wrong, can you still talk me ...
*October 5, 2015*

**math**

the number of bottles a machine is proportional to the number of minutes the machine operates the machine fills 250 bottles every 20 minutes 0,0 to 10,125 explain why these are the answers
*September 30, 2015*

**pre algebra**

robin is making bows to sell at her mothers yard sale she will use 3/4 foot of a ribbon and 2/3 of blue ribbon what is the ratio of the length of the blue ribbon to the red ribbon explain how its 2/3 to 3/4
*September 30, 2015*

**pre algebra**

robin is making bows to sell at her mothers yard sale she will use 3/4 foot of a ribbon and 2/3 of blue ribbon what is the ratio of the length of the blue ribbon to the red ribbon explain how its 2/3 to 3/4
*September 30, 2015*

**science**

what were your answers?
*September 30, 2015*

**Physics 114**

an object is dropped from a height of 7.00 meters and takes 1.19 seconds to fall to the ground. What is the acceleration due to gravity estimated from this measurement? Suppose the experiment above is done five times. Determine the mean fall time and the standard error using ...
*September 30, 2015*

**Proportions**

A 130 lbs man burned 194 calories during a 30 minute tennis session. How many calories would a 250 lbs man burn in the same time frame doing the same activity(assuming they burn calories at the same rate)? I just need help figuring out what the equation is, I can't seem to...
*September 26, 2015*

**Language Arts**

Which word has a meaning similar to prodigy? -Statue -Babysitter -Athlete -Wonder**
*September 17, 2015*

**English**

"Tolerance is the word used most often when this kind of coexistence succeeds, but tolerance is a vanilla-pudding word, standing for little more than the allowance of letting others live unremarked and unmolested. Pride seems excessive, given the American willingness to ...
*September 16, 2015*

**Science **

In general what would a scientist do after forming a testable questions? -Design an experiment**** -Develop a hypothesis -Draw a conclusion -Analyze data
*September 15, 2015*

**Ed Tech**

Before katie turns in the paper she typed she wants a peer to review it and give her feedback. katie uses her all in one printer to scan her edit,prints, and send them to her friend. An all in oneprinter is -Input device -Output device -Data storage device -Operating system
*September 10, 2015*

**Science **

Hello, I just started my chem class today and I am totally stuck on this question: Hurriance Katrina had the 2nd lowest ever recorded barometric pressure at 0.920 mb. Convert this pressure to units of… a. atmospheres. b. Inches of Hg. I know i need to convert but I'm ...
*September 2, 2015*

**statistics**

The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title. There were three job categories: clerical, custodial, and managerial. The study collected current salary data of the three groups ...
*August 19, 2015*

**mathematics **

the greatest and the least resultants of two forces acting on a body are 35kN and 5kN respectively,determine the magnitude of the forces,what would be the angle between these forces if the magnitude of the resultant is stated to be 5kN
*August 11, 2015*

**moretlwe**

describe a recent service delivery protest in your community or in the neighbourhood.
*August 5, 2015*

**Statistics **

The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a. List the different possible samples, and find the mean of each of them. b. ...
*July 20, 2015*

**Statistics**

A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Cavalier shows that the mean is 4.5 hours and the standard deviation is .6 hours. If 42 mechanics are randomly selected, find the probability that their mean rebuild time is less than 3.5 ...
*July 20, 2015*

**Statistics**

The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to ...
*July 20, 2015*

**Statistics**

75 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 10.2 pounds and a standard deviation of 2.9 pounds. What is the 95% confidence interval for the true mean weight of all packages by the parcel service?
*July 20, 2015*

**Statistics**

The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set those limits, the mean wight of quarters in circulation must be estimated...
*July 20, 2015*

**Statistics**

A sample of 106 body temperatures resulted in a mean of 98.2 degrees and a standard deviation of .62 degrees. Use these sample statistics to construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.
*July 20, 2015*

**math**

49 students went on a trip .There are 5 more girls than boys.How many boys are there?
*July 16, 2015*

**math**

In a school with 323 students there are 15 more girls than boys.How many boys are there?
*July 16, 2015*

**math**

steve ur answer is born wrong sorry
*July 16, 2015*

**math**

49 students go on a trip there are 5 more girls than boys.how many boys are there?
*July 16, 2015*

**math arithmetic sequence and series**

A theater has 30 seats in the first row, 33 seats in the second row, 36 seats in the third row, and so on in the same increasing pattern. If the theater has 15 rows of seats, how many seats are in the theater?
*June 30, 2015*

**Math**

What is the approximate average of these numbers: 9,18 and 31?
*June 15, 2015*

**P.E**

Correct
*May 22, 2015*

**Language Arts**

3 is 4 4 is 2
*May 22, 2015*

**Language Arts**

Okay thanks.... I still think its the last one because it gives a clear thesis
*May 22, 2015*

**Language Arts**

I think "The use of tablets positively affects student achievement in school" is the correct answer
*May 22, 2015*

**Language Arts**

Yes, there are two more answers but i dont think they are correct -How much tablets cost, and how are they maintained Tablets are too expensive
*May 22, 2015*

**Language Arts**

I think its B
*May 22, 2015*

**Language Arts**

Read the following topic. How could you rewrite the topic to form a focused thesis statement? *Tablets and School* -Schools use tablets daily -The of tablets positively affects students achievement in school
*May 22, 2015*

**Language Arts**

Okay thanks
*May 22, 2015*

**Language Arts**

You are trying to convince your community council to install recycling bins at the local park. Which of the following types of writing could you use most effectively to try to change the situation? -A reflective essay about the fun that you and your friends had at the park -An...
*May 22, 2015*

**Art**

Which is the best definition of intaglio? -To copy images onto the surface of paper -To chemically transfer images to the surface of paper -to carve or engrave images into the surface of a plate -to print money using high tech methods
*May 21, 2015*

**Algebra**

Okay... What does that mean?
*May 17, 2015*

**Algebra **

-2,3,1,4,5,9,.... which is most likely the 10th value in the sequence??
*May 17, 2015*