# Posts by Bill

Total # Posts: 870

**Statistics**

True or false? The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.

*May 19, 2011*

**geometry**

(4, 5)'(9, 5) and (5,1) are three of a quadrilateral whose opposite sides are equal and parallel.there are three possibilities for the co-ordinates of the missing vertex.Find all three,and draw the three quadrilateral on a grid

*May 19, 2011*

**math**

the square root of 54 2-0^2 = 4 7-0^2 = 49 1^2= 1 addd em up and take square root

*May 17, 2011*

**algebra**

93 90x6=540 82+87+95+90+93=447 540-447=93

*May 17, 2011*

**Math**

210

*May 17, 2011*

**Economics**

Budweiser (now owned by a Belgium based beer company), Miller and Coors who together produce 85% of all beer consumed in the US, each spend well over $250 million a year on television advertising campaigns, promoting their beer brands. Obviously, if one firm is advertising its...

*May 10, 2011*

**college chemistry**

idfk

*May 2, 2011*

**pLZ help**

Select a variable (mean or proportion) to determine if there is a difference in the two groups. Samples must be independent. Select a sample of data values (20 to 50) for each group. Then address the following (and a little more) in your project. a. Write a brief statement of ...

*April 30, 2011*

**Math**

Select a variable (mean or proportion) to determine if there is a difference in the two groups. Samples must be independent. Select a sample of data values (20 to 50) for each group. Then address the following (and a little more) in your project. a. Write a brief statement of ...

*April 30, 2011*

**statistics**

The highest acceptable level of pesticide found in quail has been limited to 0.35 parts per million (ppm). A hunting organization measured the level of the pesticide found in a random sample of 20 quail harvested from field trials. The sample produced a sample mean of .44. ...

*April 19, 2011*

**Phyiscs - due at 11PM EST!!**

Two identical conducting spheres, fixed in place, attract each other with a force of 0.114 N when their center to center separation is 45.00 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres have a net positive charge and repel...

*April 12, 2011*

**English**

thank you

*April 12, 2011*

**english**

The town held a festival, because the harvest was so large.

*April 11, 2011*

**english**

I'm supposed to rewrite the entire sentence changing because the harvest had been so large to a nominative absolure.

*April 11, 2011*

**english**

so what do i need to do, I don't understand it at all.

*April 11, 2011*

**english**

need help with this Nominative Absolutes sentence "The town held a festival because the harvest had been so large.". is this right? The town held a festival the harvest been so large.

*April 11, 2011*

**Physics**

At a recent rock concert, a dB meter registered 118 dB when placed 1.60 m in front of a loudspeaker on the stage. (a) What was the power output of the speaker, assuming a hemispherical radiation of the sound and neglecting absorption in the air? Answer in W (b) How far away ...

*April 1, 2011*

**Social Sciences**

I need to write an essay using the second amendment controversy with gun control as proof that the Bill of Rights is at an unhealthy state. I am going to focus on misleading ideologies surrounding guns and gun control and propose that proper gun education and knowledge is a ...

*March 26, 2011*

**us history**

after containment what would be considered the us foreign policy

*March 23, 2011*

**MATH**

yes 9 sundaes

*March 23, 2011*

**Math**

pie r squared times v

*March 23, 2011*

**PreCalculus**

"A kite is flying 100ft off the ground, and its line is pulled taut. The angle of elevation of the kite is 43 degrees. Find the length of the line."

*March 23, 2011*

**physics**

if the initial velocity is .05 m/s and its final is 1.3 m/s then how much energy is lost to friction

*March 23, 2011*

**history**

the economic system advocated by margaret thatcher was?

*March 21, 2011*

**Physics**

An equilateral triangle 100.0 m on a side has a m1 = 15.00 kg mass at one corner, a m2 = 75.00 kg mass at another corner, and a m3 = 120.00 kg mass at the third corner. Find the magnitude and direction of the net force acting on the 15.00 kg mass.

*March 17, 2011*

**chemessty**

What is the freezing point of an aqueous solution of 10.0 g of glucose (C6H12O6) in 50.0g H2O? (kf=-1.86 C/m)

*March 16, 2011*

**Physics**

A dock worker loading crates on a ship finds that a 24 kg crate, initially at rest on a horizontal surface, requires a 64 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 46 N is required to keep it moving with a constant ...

*March 15, 2011*

**Chemistry**

55g of CF2Cl2, how many grams of Cl do I have? How do I solve this kind of problem?

*March 12, 2011*

**Physics**

The coil used to measure the movements of a blowfly as described having a diameter of 2 mm, in addition the blowfly is immersed in a magnetic field of magnitude .15 mT. Find the maximum magnetic flux of one of the coils?

*March 10, 2011*

**Statistics**

Recently, a case of food poisoning was traced to a particular restaurant chain. The source was identified and corrective actions were taken to make sure that the food poisoning would not reoccur. Despite the response from the restaurant chain, many consumers refused to visit ...

*March 9, 2011*

**prealgebra**

In the equation A=ur^2, if r is doubled, by what number is A multiplied and why? a. 2 b. 1\2 c. 4 d. 1\4

*March 9, 2011*

**PreAlgebra**

If x=yz, which of the following must be equal to xy? a. yz b. yz^2 c. y^2z d. z^2\y

*March 9, 2011*

**MATH**

probability approx number of times event occurs\total number of trials. 3 shots divided by 10 free throws = .3 is the probability of making next free throw.

*March 9, 2011*

**physics**

a glider of length 10.00 cm slides down an air track. It passes through the lower photogate in .50 sec. A little later it passes through the lower photogate 100.00 cm down the track, in .25 sec. Calculate initial velocity,final velocity, and acceleration. Any help is greatly ...

*March 9, 2011*

**chemistry**

What mass of sodium iodide (NaI) is contained in 135 mL of a 7.0% (m/v) soulution?

*March 7, 2011*

**science**

You add 12.5 mL of 4.15 acetic acid to 25.0 mL of 1.00 M NaOH. Calculate the hydronium ion concentration and pH of the resulting solution.

*March 7, 2011*

**Algebra II**

you may want another opinion but since your answer must be not equal to zero and also cannot be negative you have to look at the (x-7) portion. you cannot just say all real numbers are greater than zero, because if you plug 7 into the problem, then (7-7) = 0 and will make the ...

*March 7, 2011*

**Algebra/geometry**

a rectangle has a width of 4 cm less than it's length. if a new rectangle is formed by increasing the width 5 cm and decreasing the length 3 cm, the area of this resulting rectangle is 177 cm squared. what are the dimensions of the original rectangle?

*March 6, 2011*

**MATH**

first you need to find 85% of 40 questions. turn 85% into the decimal .85... you do that by dividing 85 by 100. the formula is x=.85(40) and that gives you x=34. so now you know that Wendy had 34 out of 40 questions right, so now to find out how many she had wrong you subtract...

*March 6, 2011*

**Algebra 1**

First you have to recognize the terms you can combine, in this case a negative 4T and a negative 3T, which gives you a negative 7T. so now your problem looks like 6T^2 - 7T + 2. to factor it out you have to do a kind of reverse foil, see what term multiplied by what other term...

*March 6, 2011*

**Physics Concepts**

A father racing his son has one-third the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 1.5 m/s and then has the same kinetic energy as the son. What is the Father's initial speed? What is the Son's initial speed?

*March 5, 2011*

**math**

how much force does 1000lbs have when drop from 36"

*March 5, 2011*

**math**

A rectangular painting has an area of 720 square inches. It is to be reduced by 1/6 scale factor. What is area of the miniature copy.

*March 4, 2011*

**physics**

There is a weight on a table, connected by a cord to another weight hanging over a pulley, as shown in the diagram below. The coefficient of kinetic friction for the weight on the table is 0:25. How fast does the hanging weight accelerate? Top weight is 12 kg and bottom is 5kg.

*March 3, 2011*

**physics**

sorry no the one on top is 12 and the hanging one is 5 in kg's

*March 3, 2011*

**physics**

There is a weight on a table, connected by a cord to another weight hanging over a pulley, as shown in the diagram below. The coefficient of kinetic friction for the weight on the table is 0:25. How fast does the hanging weight accelerate?

*March 3, 2011*

**calc**

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2].

*February 28, 2011*

**Math**

How do you find the turning point of a quadratic equation? (The Formula)

*February 27, 2011*

**math**

make a let statement letx=white ribbons letx-3= blue ribbons letx+2=red ribbons x+x+2+x-3=32 solve

*February 27, 2011*

**HE AGE OF JEFFERSON TO THE AMERICAN EXPANSION**

During Jefferson's presidency, cities were A. mostly found along the Mississippi. B. mainly industrial centers. C. mainly ports for international trade. D. mostly the haunts of thieves and degenerates.

*February 26, 2011*

**CHEMISTRY**

How to determine the molarity of a 1.8% NaCl solution.

*February 24, 2011*

**math**

Among the royalty of the land of Pirnza are Velve, Brint, Draz, Flard, and Sorn.In no particular order, their titles are Queen, Marquis, duke baron, and duchess. Their ages are 25,30,35,40 And 45.From the clues given try to determine the age and Title of each of the five.

*February 24, 2011*

**science**

How to determine the molarity of a 1.8% NaCl solution.

*February 24, 2011*

**physics**

An Atwood machine consists of two masses (m1 = 175 grams, m2 = 485 grams) connected by a string over a frictionless pulley. The initial height above the floor is 157 cm. Both masses start from rest at point A ; point B is just as m2 hits the floor. What is the kinetic energy ...

*February 23, 2011*

**math**

A single die is rolled once. What are the odds against rolling a prime number?

*February 18, 2011*

**science**

Why are the Catskills not really mountains? a the catskills are lowlands b all mountains must be volcanic in origin c the horizontal rock structure shows no deformation d the catskills are a direct deposit of the last pleistocene glaicer

*February 16, 2011*

**chemistry**

lolly pops

*February 14, 2011*

**college algebra**

add 1 + 9 x+7 5x

*February 14, 2011*

**physics! (69)**

0.395

*February 7, 2011*

**Chemistry**

Raising the temperature of a sample of water will typically(decrease/increase) the solubility of (all/some) dissolved gases. Is it decrease, some?

*January 29, 2011*

**lit**

i need chapter summaries of the book The Quiet American by graham greene

*January 27, 2011*

**alg.2**

-2x+-6y=0 2x+6y=5 =5

*January 19, 2011*

**Maths**

285 liters of air.

*January 19, 2011*

**Physics**

A 1200 kg elevator is attatched to a cable whose tension is 11700 n. What is the magnitude of the elevator's acceleration? What is the Motion of the elevator? could have multiple answers.

*January 19, 2011*

**Math**

how did u wrk dat ou?

*January 18, 2011*

**chemistry help**

a 4.50 sample of LiCl at 25.0*C dissolves in 25.0 mL of water also at 25.0*C. The final equilibrium temperature of resulting solution is 60.8*C. What is the enthalpy of solution, of LiCL expressed in kilojoules per mole?

*January 18, 2011*

**chemistry help**

a 4.50 sample of LiCl at 25.0*C dissolves in 25.0 mL of water also at 25.0*C. The final equilibrium temperature of resulting solution is 60.8*C. What is the enthalpy of solution, of LiCL expressed in kilojoules per mole?

*January 18, 2011*

**physics**

Calculate the torque about the front support of a diving board, exerted by a 70 kg person 3.0 m from that support. (Take the positive direction to be clockwise.)

*January 17, 2011*

**Com170**

Write one paragraph explaining the key differences between the four types of writing (summary, analysis, synthesis, and evaluation). What do they mean.

*January 15, 2011*

**Drug Information Sources**

get a life tracey!!!!!!!!!!! whether someone checks 1 or 2 or all, its the SAME. go find something to do other than b*****ing and complaining on here

*December 22, 2010*

**physics**

A train traveling at a constant speed rounds a curve of radius 250 m. A chandelier suspended from the ceiling swings out to an angle of 15.5° throughout the turn. What is the speed of the train? what equation should i use?

*December 21, 2010*

**pre calc**

simplify: 2^x X 2^y +2^x X 2^y + 2^x X 2^y + 2^x X 2^y

*December 21, 2010*

**math**

i need to know how to solve this shark's teeth are shaped like triangles . the height of a tooth of a certain shark is 2cm longer than the base . the area is 12cm2 find the height and base.

*December 14, 2010*

**Math**

If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment? How long will it take the original investment to grow to $14,586.06

*December 10, 2010*

**Math**

If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment?

*December 10, 2010*

**Physics**

What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?

*December 9, 2010*

**Chemisty**

the answer is approximately 1.6098 M

*December 7, 2010*

**11th grade**

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box will not move...

*December 5, 2010*

**physics**

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box will not move...

*December 5, 2010*

**MATH**

Misty uses 3/4 of a bag of noodles when she makes a cartain casserole. What is the greatest number of casseroles she can make from 6 1/4 bags of noodles?

*November 30, 2010*

**MATH**

Tina and her sister evenly split a $10 lottery winning. If tina promised to giver her brother 1/4 of her share what fraction of the original $10 did she give her brother?

*November 30, 2010*

**Math**

Tina and her sister evenly split a $10 lottery winning. If tina promised to give her brother 1/4 Of her share, what fraction of the original $10 did she give her brother?

*November 30, 2010*

**Math**

Laura takes a random survey of the students in her school. Of the 48 students asked, 16 plans to go to the football game. There are 231 students in her shcool. What proportion can she use to find s the total number of students expected to attend the game?

*November 30, 2010*

**Math**

Bob wants to buy cards with $20. Each card cost between $1.80 and $2.25. What is the maximum number of cards he can buy?

*November 30, 2010*

**Math**

Which statement is true about all prisms? A. Prisms have a pair of opposite faces B. The faces of a prism are congruent C. Prims have the same number of verticrs as edges D. The base of a prism is larger then the other faces.

*November 22, 2010*

**Math**

Meka plans to bake a large circular cookies for her brothers. She wants to decorate the outer edge of the cookie small pieces of choclate. The radius of the cookies is 7 inches.What would be the closest to the curcumference of the cookie?

*November 22, 2010*

**Math**

Meka plans to bake a large circular cookies for her brothers. She wants to decorate the outer edge of the cookie small pieces of choclate. The radius of the cookies is 7 inches.What would be the closest to the curcumference of the cookie?

*November 22, 2010*

**Math**

The width of a single cour is 3/4 of the width of the double court. Double court which is the base= 36 feet and the height= 78 feet What is the area of the singles court?

*November 22, 2010*

**statistics**

The average time to sew a pair of pants is 4.2 hours with a standard deviation of 30 minutes and if the distribution is normal then the probability of a worker finishing the pants in less than 3 hours is.

*November 16, 2010*

**physics**

an object is released from rest on a planet that has no atmosphere.the object falls freely for 3.46 m in the first second.what is the magnitude of the acceleration due to the gravity on the planet?

*November 7, 2010*

**spelling**

what is the correct abc order for sister's sisters sisters'

*November 4, 2010*

**accounting**

Jan.1 Beginning Inventory..300 units @ $3.00 Mar.5 Purchase..........… 900 units @ $4.00 Sept.3 Purchase...........… 1,000 units @ $5.00 Nov. 4 Purchase....… 500 units @ $7.00 During 2011, 1,000 units are sold at $10.00 each. Assume that the Periodic Invetory ...

*November 3, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? I believe I should start with ...

*October 31, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? Not a right triangle? You know...

*October 31, 2010*

**Calc**

Still trying to figure this out. Am i going in the right direction? c2=(12t)^2+(10t)^2-2(12t)(10t)Cos100

*October 31, 2010*

**Calc**

c^2=100^2-x+(-12t)^2-2(100-x)(-12t) Cos100 or maybe this?

*October 31, 2010*

**Calc**

Ok. So c^2=100^2+b^2-2(100)b Cos100 ?

*October 31, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)?

*October 31, 2010*

**Chemistry**

How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?

*October 25, 2010*