Sunday

February 19, 2017
Total # Posts: 1,182

**statistics**

a. A statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence.

*August 15, 2011*

**statistics**

a. A random sample of 25 was drawn from a normal distribution with a standard deviation of 5. The sample mean is 80. Determine the 95% confidence interval estimate of the population mean.

*August 15, 2011*

**algebra**

1. What is the equation of the line that passes through (4,-1) and (-2,3)? 2. What is the equation of the line with an x-intercept of -1 and a y-intercept of 2?

*August 6, 2011*

**Chemistry**

A middle-aged man has been diagnosed as being at high-risk of developing Coronary Artery Disease. •State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group. •Distinguish between the ‘good' ...

*August 5, 2011*

**math**

A pile of 108 identical books has a mass of 30 kg. Find (a)the mass of 150 books and (b)the number of books that has a mass of 20 kg.

*August 2, 2011*

**Math**

Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]

*July 31, 2011*

**Computer Science**

Consider the following application files: /JavaCS1/src/guiprojectcity2/DisplayWindow.java import java.awt.*; import javax.swing.*; public class DisplayWindow extends JFrame{ private Container c; public DisplayWindow(){ super("Display"); c = this.getContentPane(); } ...

*July 29, 2011*

**algebra**

The weight of a rock sample is measured to be 2.5 pounds. What is the percent of error in the measurement?

*July 28, 2011*

**algebra**

If four times a certain number increased by 6 is equal to 94, what is the number? If x represents the number, then which of the following equations could be used to solve the problem? 4x + 6 = 94 or 4(x + 6) = 94

*July 28, 2011*

**algebra**

A clerk was asked to change a $10 bill. She returned 9 more dimes than nickels and twenty-one more quarters than dimes. How many coins of each did she return? Solve using the V.E.S.T. method.

*July 20, 2011*

**Java Programming**

Don't know how to start.. Can anyone help me? For this program you are to create a two class application - a driver and a principal class - that reads in text interactively from the keyboard, and then reports on two aspects of the entered text. First it should print a ...

*July 13, 2011*

**algebra**

Which of the following expressions has 3 terms? 8x + y - z xyz y^3 + 1

*July 10, 2011*

**algebra**

Thanks Ms. Sue!

*July 10, 2011*

**algebra**

evaluate: 7x + [x - (5 - x)]

*July 10, 2011*

**algebra**

evaluate: 7x + [x + (5 - x)]

*July 10, 2011*

**Writing**

Can you post one of your writings of your own?

*July 3, 2011*

**Writing**

Any suggestions for writing topics?

*July 3, 2011*

**writing**

what else is on the rise then?

*July 3, 2011*

**writing**

Have you ever wondered what the world would be like in the future? According to events taking place now in the world, our future will change drastically. In 50 years, our society, environment, and schools will be greatly affected. Our society will change in 50 years. The ...

*July 3, 2011*

**math**

19. A high school soccer team has two goalies. Goalie A makes the save 80% of the time. Goalie B makes the save 75% of the time. If goalie A plays 35 of the games and goalie B plays 25 of the games then: a) Determine the probability that a save has been made by either goalie A...

*June 25, 2011*

**algebra**

for the equation 6x+7y-6=0 what is the ordered pair

*June 25, 2011*

**calculus**

find the surface area obtained by revolving about the line y =1 the region enclosed by the curve x= 3/5y5/3 -3/4y1/3 on [0,1]

*June 13, 2011*

**Chemistry**

3 I- (aq) +H3AsO4 (aq) + 2 H+ = I3- (aq) + H3AsO3 (aq) + H2O (l) is found to be first order with respect to each of the reactants. write the rate law. what is the over all order?

*June 5, 2011*

**geometry**

A pyramid has a volume of 24 and a base area of 12. What is the length of the altitude of the pyramid?

*May 25, 2011*

**2nd Grade Math**

multiply 1/4 by 7/1

*May 23, 2011*

**geometry**

find the measure of angle 3 if angle 2 is 5x-8 amd angle 4 is 3x-10

*May 23, 2011*

**Business Finance**

When a bank borrows 550,000 from the FED snd received s short-term ajustment credit for 3 days with the loan promised to be paid on the 6th day how much total reserves would rise with this loan.

*May 15, 2011*

**Business Finance**

If a bank borrows $550,000 from the FED on Friday and repays it on Monday show how it should be written on a T-account for this transaction

*May 14, 2011*

**music**

the difference between Franz Liszt and Felix Mendelssohn

*May 1, 2011*

**chemistry**

How would a titration be used to determine the concentration of lead ions that may be present in the water supply of an old house that still has lead pipes?

*May 1, 2011*

**Math**

A rectangular parking lot is 25 ft. ny 50 ft is increased on all 4 sides by the same amount. The area increased by 400 sq ft. What are the new dimensions of the parking lot?

*April 27, 2011*

**Literature (Vocabulary)**

When the _1_ citizens of Reynoldsville finally realized that their forty-cent bottles of miracle sap contained nothing more than licorice extract and whiskey, they formed a lynch mob and searched for the _2_ who had sold the fake elixir. Fortunately, Colonel Britton, the ...

*April 26, 2011*

**music**

what similarities does Claudio Monteverdi and Antonio Vivaldi have in common?

*April 15, 2011*

**music**

what similarities does Claudio Monteverdi and Antonio Vivaldi have in common?

*April 15, 2011*

**music**

what the difference between Antonio Vivaldi and Claudio Monteverdi

*April 13, 2011*

**analogies**

tooth:decay::treestump (grow/die/rot/burn/rust) i think rot is that correct

*April 11, 2011*

**analogies**

my other guess is head light

*April 11, 2011*

**analogies**

furnace:fireplace::lamp: ? log,street light,light bulb, headlight,candle is light bulb correct?

*April 11, 2011*

**analogies**

spend/waste/save/volunteer/measure

*April 11, 2011*

**analogies**

is this correct clothes:donate::time:spend

*April 11, 2011*

**analogies**

concert:stage::football game: ? (team/stadium/ field/ quarter back/ arena) i think team can you tell me if that's right

*April 11, 2011*

**analogies**

im not sure but i think stove

*April 11, 2011*

**analogies**

the choices i have are (bathing suit , stove, cap ,refrigerator, pot holder)

*April 11, 2011*

**analogies**

cold:mitten::hot: ?

*April 11, 2011*

**science**

if i pulled a rectangular block on each of the three sides which would have the most friction

*April 9, 2011*

**science**

if a block of wood is pulled at constant speed on ice what would the friction be like

*April 9, 2011*

**Spanish -Please check**

If I ask Manuel if he is in a hurry I could say: Manuel, ¿Tienes prisa?

*April 6, 2011*

**Spanish 7th grade-Please check**

Thank you

*April 6, 2011*

**Spanish 7th grade-Please check**

Please check. How would I say "I feel like drawing. Would it be: Yo tengo ganas de dibujar.

*April 6, 2011*

**social studies**

Both Stalin in the Soviet Union and Hitler in Germany instituted ruthless campaigns against supposed enemies of the state. Why do you think dictators need to find scapegoats for their nations ill?

*April 2, 2011*

**Math**

Thanks Henry

*March 29, 2011*

**Math**

The drama club raised a total of $1,123.50 selling tickets to its production of Othello. Tickets cost $4.50 for adults and $2.00 for students. Three times as many student tickets were sold as adult tickets. Which system of equations can be used to find a, the number of adult ...

*March 29, 2011*

**cross word puzzle**

squawk

*March 24, 2011*

**Physics-You don't have to respond-I figured it all out**

I figured it out-thank you

*March 24, 2011*

**Physics-BobPursley please recheck**

I have another question-I looked closely at the explanation and when you added the three resistors together you came up with Rt=60/31. Then you added the series to the 2Ohm and said total equals 151/60-I'm lost there because 2 Ohms would equal 30/60 or when added to the ...

*March 24, 2011*

**Physics-Please help**

Thank you for your help-I can really use the explanation for my other problems too. Thank you again-

*March 24, 2011*

**Physics-Please help**

Please irnore the multiple choice answers-they were for a different problem that I copied down

*March 24, 2011*

**Physics-Please help**

I need a little direction with this question:If someone could provide the correct formula, I think I divide each reistor by 12V but I'm not sure. To find total resistance, do I just add the reciprocals? Three resistors connected in parallel have individual values of 4.0, 6...

*March 24, 2011*

**Spanish 6th grade-Please check**

Oops I put ham as hamon I think it should be el sandwich de jamon?

*March 23, 2011*

**Spanish 6th grade**

How do I say a ham sandwich or a cheese sandwich? For cheese sandwich is it el sandwich de queso? For ham sanwich is is el sandwich de hamon? I'm not sure how to spell ham

*March 23, 2011*

**6th grade math**

the rectangulr backyard measures 131 feet by 52 feet. the garden measures 13 feet by 9 feet. what is the area of the backyard that will be grass.

*March 21, 2011*

**6th grade math**

s=5m find the area of square

*March 21, 2011*

**calculus**

solve the initial value problem by separation of variables dy/dx=-xy^2, y(1)=-0.25

*March 19, 2011*

**calculus**

solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4

*March 19, 2011*

**Biology**

Please help with this, What was it important to have a detailed growth curve for your test plant (which was a Lemna spp.) sample on a frequent basis grown under control conditions without a test chemical?

*March 17, 2011*

**math**

15% of x = 45

*March 16, 2011*

**Chemistry help!!!**

Calculate [H3o+] in each aqueous solution at 25*C, and classify each solution as acidic or basic. a. [OH-]= 1.1 x 10^-9M b. [OH-]= 2.9 x 10^-2M c. [OH-]= 6.9 x 10^-12M

*March 14, 2011*

**math**

5 hockey pucks and three hockey sticks cost $23. 5 hockey pucks and 1 hockey stick cost $20. How much does 1 hockey puck cost?

*March 14, 2011*

**College Algebra**

solve the following equation. 9^(x-1)+4*3^(x-1)=5

*March 7, 2011*

**College Algebra**

solve the following equation. 9^(x-1)+4*3^(x-1)=5

*March 7, 2011*

**stats**

A) A and B are not independent: P(A)*P(B)= 0.25*0.30 = 0.075. This is not equal to P(A and B) = P(B|A)*P(A) = 0.48*0.25 = 0.12. B) P(A and B) = P(B|A)*P(A) = 0.48*0.25 = 0.12. C) P(A or B) = P(A) + P(B) - P(A and B) = 0.25 + 0.30 - 0.12 = 0.43 D) P(A|B) = P(A and B)/P(B) = 0....

*March 6, 2011*

**5th grade math**

x+13 is a fact family to 42 so 29+13=29 -13 ---- 29

*March 2, 2011*

**History**

What did people in the House of Tudor do?

*February 27, 2011*

**History**

@Writeacher - what do you mean by read widely?

*February 27, 2011*

**History**

The Inuit people of North America are all _______________

*February 27, 2011*

**Science**

Which of the following would typically contain ribosomes? (a) fungi (b) bacteria (c) Archeae (d) viruses (e) prions

*February 27, 2011*

**Math**

A marble is 12mm in diameter. What is the smallest height box that is 96mm square that can hold 200 marbles and still have the lid fit on the box without interference?

*February 27, 2011*

**Chemistry (Math)**

Also, Is the height of the liquid in the cube beaker less than or greater than 1 cm? This was a follow up question. Since, the answer is 0.8. This would be less than, correct?

*February 27, 2011*

**Chemistry (Math)**

Thanks! I understand what you are doing. Just one question: how did you get 80?

*February 27, 2011*

**Chemistry (Math)**

A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that the liquid height is...

*February 27, 2011*

**Chemistry (Math)**

A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that the liquid height is...

*February 27, 2011*

**ENGLISH**

sorry that i put Jay as my name was talking and typin at the same time

*February 24, 2011*

**ENGLISH**

Please Check for any errors I wish to compliment you on the radio ad you presented to the committee yesterday. This ad will be a fine complement to our advertising campaign for Wiz our new product. By the time, we have our next meeting you may be able to devise additional ...

*February 24, 2011*

**Chemistry**

Consider the reaction: 2 H2S(g)--><-- 2H2(g) + S2 Kp= 2.4 x 10^-4 at 1073k A reaction mixture contains .112 atm of H2,.055 atm of S2, and .445 atm of H2S. Is the reaction mixture at equlibrium? If not, in what direction will the reaction proceed?

*February 23, 2011*

**Chemistry**

Consider the reaction: 2 H2S(g)--><-- 2H2(g) + S2 Kp= 2.4 x 10^-4 at 1073k A reaction mixture contains .112 atm of H2,.055 atm of S2, and .445 atm of H2S. Is the reaction mixture at equlibrium? If not, in what direction will the reaction proceed?

*February 23, 2011*

**Math**

Find the area of the triangle ABC given A = 30°, b = 5, and c = 2.

*February 20, 2011*

**chemistry**

Ag+HNO3-----AgNO3+NO+H2O balance the redox reaction using the oxidation-number method

*February 20, 2011*

**8th grade science**

because your body is 60% water.

*February 17, 2011*

**geometry**

what 3 dimensional shape has base of a triangle,4 faces,6 edges and 4 vertices?

*February 17, 2011*

**Math**

The number of people waiting in a line for a movie hours (x) people (y) 1 170 2 230 3 290 4 350 Is this discrete or continuous data?

*February 16, 2011*

**geometry**

Trapezoid ABCD has height 4, BC=5, and AD and BC are perpendicular. Find the area of the trapezoid.

*February 13, 2011*

**geometry**

Trapezoid ABCD has height 4, BC=5, and AD and BC are perpendicular. Find the area of the trapezoid.

*February 13, 2011*

**math 5th grade**

Insert parentheses to make sentence true: 32 + (-4) - (-5) * 4 = 13

*February 13, 2011*

**math - 5th grade**

Insert parentheses to make sentence true: 8^2 - (-9) + (-10) * 8 = 88 (8^2 is 8 squared, just couldn't type it in the traditional way).

*February 13, 2011*

**writing**

Write a paragraph about the Syrian car 'Sham'

*February 1, 2011*

**English**

Would it be Do you still have relatives living there, Kate?

*January 30, 2011*

**English**

Do i need a comma? Do you still have relatives living there Kate?

*January 30, 2011*

**geometry**

maddie throws a baseball fom third base to first base. The four go foot lines between the bases from a square which number is the best estimate of how far maddie throws the baseball

*January 29, 2011*

**Chemistry**

2. 12.5 ml of 0.280M HNO3 and 5.0mL of 0.920M KOH are mixed. To make the resulting solution neutral, which of the following should be added? -1.1 mol HCl -1.69 mL of 0.650M HBr -0.55 mmol Mg(OH)2 -2.2mL of 0.50M LiOH -none of the above; already neutral -KOH is in excess by 0....

*January 28, 2011*

**Chemistry**

Please help me with these questions: 1. Consider the equation:2Na+ 2H2O-->2NaOH +H2 -If 92.0g of sodium is reacted with 76.0g of water until the reaction goes to completion, which reactant will remain and in what quantity? A: I know that H20 is the reactant that is in ...

*January 27, 2011*