Thursday

July 30, 2015

July 30, 2015

Total # Posts: 925

**psychology**

what happens to the brain as an individual grows older? a. what happens to the billions of nerve cells in the cortex as one becomes older? b. will the dead neurons be replaced? c. why is memory affected as one grows old?
*June 26, 2015*

**Math**

Thank you Jai - I wish I had the nerve to tell her she was wrong, I tried that once and oh boy, let's just say things did not work out after that. I'll just know I was right and accept the 2 points off. Thank You again Kyle
*May 18, 2015*

**Math**

Problem is: 58,000.000 KM being converted to light-years I did 58,000,000 x 365 x 24 x 60 x 60 and came up with 0.0000006131 and converted that to 6 x 10 to the negative 6. My teacher says it should have been 6 x 10 to the negative 5? Could you explain where I went wrong? ...
*May 18, 2015*

**Math**

Thank You for the help.
*May 17, 2015*

**Math**

Could someone show me the formula to convert KM to Light-Years? Thanks for any help you can give me.
*May 17, 2015*

**Math**

THANK YOU AGAIN MS. SUE looks like I'm getting pretty good with your help LOL Thank you again Kyle
*May 16, 2015*

**Math**

The cost of one swimming lesson for various numbers of students is given in the table below. How much would each student have to pay for a swimming lesson in a group of 6 students? # of students Total Cost 1 $40.00 2 $50.00 3 $60.00 4 $70.00 I think the answer is total $90.00 ...
*May 16, 2015*

**Math**

Tickets for children cost $3.00, adult tickets cost $5.00. I am responsible for selling 6 tickets. How would I figure out all the possible dollar amounts that my ticket sales could total? SOOOO confused, please, any help would be sincerely appreciated. Thank You
*May 14, 2015*

**Chemistry**

If 0.176 g of pure sodium hydroxide was dissolved in water and the solution titrated with 5.05 mL of hydrochloric acid solution to a phenolphthalein end point, calculate each of the following of the hydrochloric acid solution. (a) the molarity = .871 (b) the percent by mass (...
*May 6, 2015*

**Language Arts**

is it D
*May 4, 2015*

**Language Arts**

In Dragonwings for this question: From this text: Why I daresay they make better neighbors than some other folk, whom I won't name because I'm a Christian woman. Miss Whitlaw glared a poisonous glance at the demon, who had guided the soldiers over here. The demon ...
*May 4, 2015*

**Language Arts **

Need help with this question: Which of the following word pairs best shows in the novel shows how the people of San Francisco were affected by the earthquake in the book DragonWings? A. shocked and tired B. angered and violent C. traumatizing but hopeful d exhausted but ...
*May 4, 2015*

**math**

Would the solution be just 40?
*April 30, 2015*

**math**

We did the question (And how many combinations are possible if digits may be repeated?)
*April 30, 2015*

**math**

Answer the following questions below that go with the following: Let's say that a locker combination lock uses numbers 0 through 39 for a 3 digit combination. 1.) Exactly how many combinations are possible if NO digit may be repeated? And how many combinations are possible...
*April 30, 2015*

**science**

Could you please check my answers? Question one: When evolution was first proposed, which of the following was used as evidence as support? A. Observations of nature. B. lab experiments. C. extensive fossil collections, D. genetic sequences. I chose answer C. Second Question: ...
*April 29, 2015*

**math**

A cardboard box is open at one end and is shaped like a square prism missing one of its square bases. The volume of the prism is 810 cubic inches, and its height is 10 inches. A)What is the length of each side of the base? B)Draw a net of the box C)How much cardboard is used ...
*April 28, 2015*

**math**

Raj builds a side table in the shape of a cube. Each edge of the cube measures 20 inches. Raj wants to cover the top and four sides of the table with ceramic tiles. Each tile has an edge length of 5 inches. How many tiles will he need? THANK YOU!
*April 23, 2015*

**Language Arts**

Is it C
*April 21, 2015*

**Language Arts**

Hello, this is long but I need my answer checked to this short selection the question is asking What best expresses the Author's point of view. Story selection: There's good news and bad news about grizzly bears in the American West. The good news their numbers have ...
*April 21, 2015*

**Language Arts**

ok thanks
*April 21, 2015*

**Language Arts**

its just asking the main conflict of what was a dialogue
*April 21, 2015*

**Language Arts**

Hello, I need help with these questions and checking my answers. First Question: Which one of these lines is the main conflict? I don't have to remind you to get your grades up,You're the only one without approval thats due in two weeks, or Jason who is entering the ...
*April 21, 2015*

**CHEM**

Yes, that problem makes sense to me that you attached. How do I go about this problem though if I don't have a dilution factor? I only have the half life and the activity.
*April 20, 2015*

**CHEM**

An isotope has a half-life of 56 days. It now has 10,000 DPM/ml. What is the activity in the diluted specimen? Very confused, any help would be appreciated!
*April 20, 2015*

**Math**

1. im not sure 2. correct
*April 14, 2015*

**Science**

How much current does a flashlight use if its battery supplies 3.0 Volt and the bulb has a resistance of 4.0 Alpha
*April 7, 2015*

**math**

Stewart is playing a video game. He earns the same number of points for each prize he captures. He earned 1,200 points for 6 prizes, 2,000 points for 10 prizes, and 2,600 points for 13 prizes. Which is the dependent variable in this situation? A)the number of prizes captured B...
*April 4, 2015*

**math**

Jose wants to find how many gallons of water he needs to fill his cube-shaped aquarium. One side of his aquarium is 4 feet long. a)Write and solve an expression to find the volume of Jose's aquarium. b)One cubic foot is equal to 7.48 gallons of water. How many gallons of ...
*March 10, 2015*

**math**

Marcus is doing a science experiment in which he measures the rate at which bacteria multiply. Every 15 seconds the bacteria double in number. If there are 10 bacteria now, how many will there be in 2 minutes?
*March 10, 2015*

**chemistry**

start by figuring out what 35.51 percent of 169 grams is. It is around 60 grams (60.0119g to be exact) this is the percentage of carbon in MSG. Now look at the bottom number on the periodic table for carbon 12.01, meaning one Mol is 12.01g, therefore 5 carbons will be needed ...
*March 6, 2015*

**biology**

Assuming logistic growth, if I told you there are currently 100 quail on campus, with r=0.1, but that they have greatly exceeded their carrying capacity = K = 50. How many quail will be in the population next generation I don't remember how K factors in
*March 6, 2015*

**Ecology**

Assuming logistic growth, if I told you there are currently 100 quail on campus, with r=0.1, but that they have greatly exceeded their carrying capacity = K = 50. How many quail will be in the population next generation? So r is rate of growth, and it determines the increase ...
*March 6, 2015*

**math**

Select the sentence that is correctly completes the sentence below. to convert from a smaller unit
*March 4, 2015*

**math**

aw thank you so much. so, how do to write with step? (gof)(x)=4x2-16x+8 (g(f(x))=4x2-16x+8 and then?
*March 4, 2015*

**math**

f(x)=(2x-3) (gof)(x)=4x2-16x+18 g(x)...?
*March 4, 2015*

**math**

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet.What is the width of the basketball court? Thank you!
*March 3, 2015*

**math**

SORRY.. here is the question... What is the width of the basketball court?
*March 3, 2015*

**math**

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet as shown in the following diagram. Thank you!
*March 3, 2015*

**Science**

Organs like the liver, lungs, and intestines, each perform a specific job. COMPARE AND CONTRAST: How are the organs in a model of a human body the same and how are they different? Thx!!
*February 28, 2015*

**physics**

if you have your distance of 13,132m and you know your speed of 233m/s recall distance=speed x time so take your distance and divide it by your speed 13,132/233= 56.361 seconds ULL Physics
*February 26, 2015*

**math**

Alan has partially completed the chart showing the distance between his town, Greenville and two other towns. DISTANCE BETWEEN GREENVILLE and NEARBY TOWNS (miles) Parker = 29 Hadley = ? 1)The distance between Hadley and Greenville is 13 miles less than the distance between ...
*February 26, 2015*

**math**

William earns $13 an hour working at a movie theater. Last week he worked h hours at the concession stand and three times as many hours at the ticket counter. Write and simplify an expression for the amount of money William earned last week. THANK YOU!
*February 24, 2015*

**Math**

Thank you Steve, sorry for the confusion. This is a chart with x's in the numbers (like a bin). There aren't any x's in 5 or 7. Would I exclude them and only use, 0, 1, 2, 3, 4, 6, and 8? Then my median would be 3. Correct? Thanks
*February 23, 2015*

**Math**

I have a table with x and y. x = 0, 1, 2, and 3. y=2xsquared. My answers are 0 = 0, 1 = 4, 2 = 16, and 3 = 36. Am I right? Thanks.
*February 23, 2015*

**Math**

I have to find the median of 0, 1, 2, 3, 4, 5, 6, 7, 8. There is no data in 5 or 7. Would the median still be 4? Thanks for your help
*February 23, 2015*

**social studies**

what did juan perón and salvador allende have most in common?
*February 18, 2015*

**Geometry **

A ship sails 400 km on a bearing of 75 degrees
*February 18, 2015*

**Organic Chemistry**

A 1.0 gram sample of aspirin will dissolve in 300 mL of water and in 17 mL of chloroform at 25 deg C. a. What is the solubility of aspirin in each solvent expressed in g/mL? (show your calculations) I don't know where to start, does the molecular weight come into play (180...
*February 17, 2015*

**math**

George wants to put carpeting in a rectangular living room and a square bedroom. The length and width of the lving room is 12 feet by 18 feet. One side of the square bedroom is 13 feet. It will cost $3.50 per square foot to carpet the rooms. A)Write an expression that can be ...
*February 12, 2015*

**math**

Show how to write and evaluate an expression to represent and solve this problem: Jeff and his friend each text four classmates about a concert. Each classmate then texts four students from another school about the concert. If no one receives the message more than once, how ...
*February 11, 2015*

**math**

FOUR QUESTION PROBLEM: Amy and three friends launch a new website. Each of the four friends e-mails the web address to three new friends. These new friends forward the web address to three more friends. If no one receives the e-mails more than once, how many people will ...
*February 11, 2015*

**math**

Tell whether the value of the expression is less than the base of the expression: a) 2^3 b)(5/6)^3 c) 3^1 d)(5/2)^3 e) 1^3 ...b)equals 125/216. So is the correct answer YES it is less than the base? ...d)equals 125/8. Is the correct answer NO it is not less than the base?
*February 10, 2015*

**math**

Show how to write and evaluate an expression to represent and solve this problem: Jeff and his friend each text four classmates about a concert. Each classmate then texts four students from another school about the concert. If no one receives the message more than once, how ...
*February 10, 2015*

**math**

Tell whether the value of the expression is less than the base of the expression: a) 2^3 b)(5/6)^3 c) 3^1 d)(5/2)^3 e) 1^3 THANK YOU!
*February 10, 2015*

**math**

FOUR STEPS: Amy and three friends launch a new website. Each of the four friends e-mails the web address to three new friends. These new friends forward the web address to three more friends. If no one receives the e-mails more than once, how many people will receive the web ...
*February 10, 2015*

**math**

Show how to write and evaluate an expression to represent and solve this problem: Jeff and his friend each text four classmates about a concert. Each classmate then texts four students from another school about the concert. If no one receives the message more than once, how ...
*February 8, 2015*

**math**

In a game, you draw a card with three consecutive numbers on it. You can choose one of the numbers and find the sum of its prime factors. Then you can move that many spaces on a game board. You draw a card with the numbers 25, 26, 27. Which number should you choose if you want...
*February 7, 2015*

**math**

Alice wants to find all the price factors of the number you get when you multiply 17x11x13x7. She thinks she has to use a calculator to perform all the multiplications and then find the prime factorization of the resulting number. Do you agree? Why or why not? THX
*February 7, 2015*

**math**

Explain why it is possible to draw more than two different rectangles with an area of 36 square units, but it is not possible to draw more than two different rectangles with an area of 15 square units. The sides of the rectangles are whole numbers. EXPLAIN your answer. THX
*February 7, 2015*

**Chemistry**

I understand the solution above but if the limiting reagent is 1.8 that means to get the [Ce^3+]= 1.5-1.8= 0.3mols/ 0.10L wherein 0.1L is the total volume. Is this correct? Thanks.
*February 4, 2015*

**Chemistry**

The ksp for Ce(IO3)3 is 3.2E-10. What is Ce^3+ concentration in a solution prepared by mixing 60ml of 0.025M Ce^3+ with 40ml of 0.045M IO3^-?
*February 4, 2015*

**statistics**

suppose a sample of 2404 tenth graders is drawn.Of the sampled, 601 read at or below the eighth grade level. using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level.
*January 23, 2015*

**math**

suppose a sample of 2404 tenth graders is drawn.Of the sampled, 601 read at or below the eighth grade level. using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level.
*January 23, 2015*

**math**

Suppose babies born in a large hospital have a mean weight of 3181 grams, and a standard deviation of 526. If 97 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would differ from the population mean by greater ...
*January 23, 2015*

**algebra**

Find the equation of the line passing through the points 2003-13-02-00-00_vl_files/i0030000.jpg and 2003-13-02-00-00_vl_files/i0030001.jpg. A. 2003-13-02-00-00_vl_files/i0030002.jpg B. 2003-13-02-00-00_vl_files/i0030003.jpg C. 2003-13-02-00-00_vl_files/i0030004.jpg D. 2003-13-...
*January 15, 2015*

**Algebra**

4x-1+3=4x My answer is -5 4x-1+3x=4x 3x+4x 8x-1 = 4x-8 -1 = -4x -1-4 = x -5 = x Am I correct
*January 13, 2015*

**Algebra- Middle**

My math question ask is 1/3(x-9) = 2x+7 greater than or less than 4/3(x+4)= -4x. The problem (1) answer = 6. Problem (2) answer = -1. Therefore problem (2) is less than problem (1). Are the answer to the equations correct. Sincerely
*January 13, 2015*

**Math**

Thank You Reiny, much appreciated. Could you tell Ms. Sue thanks for the heads up on the website math is fun, I have been learnign quite alot form it. Thank You again. Kyle
*January 12, 2015*

**Math**

If I were to compare -(-9)and -[-9] would it be less than, more than or equal to? I say it is equal to. Would I be right? Thank You for your help.
*January 12, 2015*

**Math**

Thank you very much Ms. Sue
*January 12, 2015*

**Math**

What rational number is less than 0 but greater than -1/2? I think its negative 1/4 would I be right? Thank You for your help.
*January 12, 2015*

**Physics**

Because he found the velocity per second so you have to multiply by two to get the answer for two seconds
*January 7, 2015*

**college pre-calculus**

what is the equation of lowest degree with real coefficients if two of its roots are -1 and 1+i? A. x^3+x^2+2=0 B. x^-x^2-2=0 C. x^3-x+2=0 D. x^3-x^2+2=0 e. none of the above i dont get it is it (x+1) (1+i)
*January 6, 2015*

**ap chemistry**

thanks
*January 6, 2015*

**ap chemistry**

no she didnt give it sadly
*January 6, 2015*

**ap chemistry**

calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
*January 6, 2015*

**ap chemistry**

calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
*January 6, 2015*

**chemistry**

i need help
*January 6, 2015*

**chemistry**

calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
*January 6, 2015*

**college**

a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
*January 5, 2015*

**chemistry**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. whats wrong 25 g NaCl 1.0 L solution 1.0 g/mL 25 g NaCl/58.44 g NaCl...
*January 5, 2015*

**college chemistry**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015*

**science**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015*

**ap chemistry**

tanks
*January 5, 2015*

**ap chemistry**

what else is right?
*January 5, 2015*

**ap chemistry**

its touluene
*January 5, 2015*

**ap chemistry**

what else is right help me
*January 5, 2015*

**ap chemistry**

is that right answer
*January 5, 2015*

**ap chemistry**

HELP ME WITH THIS ONE WHEN DONE WITH THE OTHER THX calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
*January 5, 2015*

**ap chemistry**

i figureed is this right DrBOb22 is my ansswers right mass percent: 43.359/152.6gx100= 28.4% mass of benzene: 25 mLx .874 g/mL= 109.25 grams mass of touluene: 50 mLx .867 g/mL= 43.35 grams molarity: .251 mol/.175 L= 1.43 M molality: .251 mol/ .10925 kg= 2.30 m x touluene= .470...
*January 5, 2015*

**ap chemistry**

need help
*January 5, 2015*

**ap chemistry**

is this right: mass percent: toluene 28.4 % benezene: 7.6% mole fraction x C6H5CH3: .251 mole fraction of X C6H6 1.619 molality: 2.3 molal molarity: 1.43 M is that right? idk
*January 5, 2015*

**ap chemistry**

mass of benzene is 0.874 g/ml mass of toluene= 0.867 g/mL
*January 5, 2015*

**ap chemistry**

i dont know how to do it
*January 5, 2015*

**ap chemistry**

but how u do it explain please
*January 5, 2015*

**ap chemistry**

a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
*January 5, 2015*

**chemistry**

calculate the concentration of CO2, in a soft drink after the bottle is opened and equilibriates at 25C under a CO2 partial pressure of 0.0003 atm.
*January 5, 2015*

**chemistry**

a solution is prepared by mixing 50.0 mL toluene (C6H5CH3 d=0.867 g/mL) with 125 mL Benzene (C6H6 d=0.874 g/mL). assuming that the volumes add upon mixing, calculate the mass percent, mole fraction, molality, and molarity of the toluene.
*January 5, 2015*

**science**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015*