# Posts by courtney

Total # Posts: 788

**Organic Chemistry**

Hello I have to determine the theoritical yield of sulfanilamide after crystalization of impure sulfanilamide with 95% ethyl alcohol (the impure sulfanilamide contains 5% Fluorenone) I understand how to calculate the theoretical yield, my problem is determining the chemical ...

*September 11, 2012*

**physics**

1.15

*September 9, 2012*

**Stats**

A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis?

*September 9, 2012*

**Hypothesis Statistics**

A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis?

*September 9, 2012*

**Hypothesis Statistics**

At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine...

*September 9, 2012*

**chemistry**

A typical adult body contains 55 water. If a person has a mass of 61 , how many pounds of water does she have in her body?

*September 6, 2012*

**math**

is surface area squared? if I got 201 meters for the surface area would it be: 201 meters or 201 meters ^2

*September 3, 2012*

**math**

(2 revolutions/second)(60 seconds/minute) would this just be: 2 rev. per second • 60 seconds= x rev. per minute 120 revolutions per 60 seconds 120 revolutions per minute answer= 120 revolutions per minute

*September 3, 2012*

**Algebra 2**

if the angle of elevation of the sun with the ground is 10 degrees, what is the length of a shadow cast by a six foot person to the nearest foot?

*August 21, 2012*

**health**

Im using this for Ashworth too! 😂

*August 11, 2012*

**social studies**

With the vital assistance of _______, Theodore Roosevelt established the first comprehensive national conservation policy

*August 10, 2012*

**BUS303**

How has technology fostered new cost effective virtual methods of training

*July 22, 2012*

**Sociology**

Write a 1,000-1850 -word response in which you consider specific types of communication, common miscommunications among genders, and effective communication strategies. Address the following questions: o What type of verbal and nonverbal communication do men and women use? Is ...

*July 16, 2012*

**Physics**

A bicyclist starts from rest and accelerates at a constant rate for 15.0s. After 10.0s the bicycles front wheel is turning at a rate of 2.5 rev/s. The tire wheel has a diameter of 0.8m. A)Through how many revolutions does the wheel turn in the first 10.0s? B)What is the linear...

*June 18, 2012*

**Math**

Victoria has a boat that can move at a speed of 20km/h in still water. She rides 140km downstream in the same time it takes 35km upstream. What is the speed of the river?

*May 17, 2012*

**math**

what is the surface area of a cylinder radius 10 hieght 2

*May 8, 2012*

**English Parallelism**

Okay thank you sooo much for your time and patience you really helped me alot !

*April 29, 2012*

**English Parallelism**

So for 6 we dibt use not only but also ?

*April 29, 2012*

**English Parallelism**

Okay i don't quite get it but ill try 6. The student was not only scrupulous, but also received an award for honesty at the end of the year. 7. I don't really understand this one By the way thank you so much for helping me youve been a huge help

*April 29, 2012*

**English Parallelism**

Wait i think i know it Either children are dogmatic with their ideas or children do not have any ideas

*April 29, 2012*

**English Parallelism**

6. Not only was the student scrupulous, but also at the end of the year he received an award for his honesty 7. I have no clue

*April 29, 2012*

**English Parallelism**

The teacher was tentative about which day the vocab test would be scheduled; he could either give it on monday or give it on tuesday. (Or is it givr it on monday or on tuesday)

*April 29, 2012*

**English Parallelism**

Oh okay , is 4 correct ?

*April 29, 2012*

**English Parallelism**

But aslo are soup and clam .....? 4. The man was told either to leave or to eat with manners, but he never returned to that restuarant again.

*April 29, 2012*

**English Parallelism**

Im not sure the orginal sentence is #3 but i think its just the 2( soup and clam chowder)

*April 29, 2012*

**English Parallelism**

Not only is steak on the menu but also is soup abd clan chowder that was hand-prepared by the chef.

*April 29, 2012*

**English Parallelism**

Ok will #1 be like this ? Because of prejudice in the corporation, not only did he leave but also he sued for two million dollars; he did not win the case. ???

*April 29, 2012*

**English Parallelism**

Okay i read definition and everything i just really don't understand how to this

*April 29, 2012*

**English Parallelism**

I need help with parallelism i need to rewrite these sentences. 1. Because of prejudice in the corporation, not only did he leave but also sued for two million dollars; he did not win the case in court. 2. Since he wanted neither to get a ticket nor bother disable people he ...

*April 29, 2012*

**geomitry**

find the volume of this rectangular prism hieght3.5 width1.4 and length2

*April 26, 2012*

**algebra**

what is the answer to this 15y < -5

*April 18, 2012*

**math**

Fifteen (y) less than. Negitive five Solve for y

*April 18, 2012*

**math**

15y<5

*April 18, 2012*

**Math**

the answer is so easy and what grade are you in

*April 16, 2012*

**homework check**

which if the following statements is false? a. The points of a circle are coplanar b. Concentric circles intersect in exactally one point c. In are AB C Denotes that an arc of the circle has endpoints A and C and that passes through B d. If a line and a circle are coplanar and...

*April 15, 2012*

**Math**

4 out of 10 or 2/5

*April 15, 2012*

**Geometry**

in a circle of radius 11 cm, find the area of the segment bounded by an arc of measure 60 degrees and the chord joining the endpoints of the arc. A. 12.9 cm B. 122.5 cm C. 11.0 cm D. none of these

*April 15, 2012*

**geometry Please help!**

The radii of the larger wheels on a tractor are 32 cm. If the ratio of the diameter of a large to small wheel is 19:7, find the diameters of the smaller wheels

*April 15, 2012*

**Geometry**

Two straight pipes intersect under a circular garden and intercept non-adjacent arcs that measure 34 degrees and 108 degrees. What is the measure of the acute vertical angles formed where the two pipes intersect?

*April 15, 2012*

**Geometry!**

d is correct

*April 15, 2012*

**math**

yes he has enough I did 10.20 Divided by 1.02 and it equals 10

*April 15, 2012*

**Math**

The diameter of a circle is 130 cm, and a chord of the circle is 66 cm long. What is the distance between the chord and the center of the cirlce?

*April 15, 2012*

**Geometry**

A park maintenance person stands 23 m from a circular monument. If you assume her lines of site are tangents to the monument and make an angle of 23degrees, what is the measure of the monument that her lines of site intercect?

*April 15, 2012*

**Geometry**

Thanks so much!

*April 15, 2012*

**Geometry**

The measure of the central angle of a sector of a circle is 90degrees. The arc length of the sector is 3(pie) cm. What is the radius of the circle?

*April 15, 2012*

**Geometry**

6 = x + 2

*March 31, 2012*

**Algebra 2**

Part 1 Describe the graphs of the functions f(x) = 2^x – 1 and g(x) = –2^x – 1 Part 2 Compare and contrast the domain and range of f(x) and g(x).

*March 29, 2012*

**earth**

3. Show how the length of day changes with latitude by plotting the following points. Use the table below as a graph and place an X in the box where you want to plot a data point. For example, if you find that a day is 10 hours long at 30° N latitude, represent this data ...

*March 26, 2012*

**chemistry**

What weight of potassium chlorate is required to prepare 89.6mL of oxygen measured over water at 21.0 degrees C and 743 millimeters of mercury?

*March 17, 2012*

**calculus**

How do I find the indefinite integral of cosx/(1-cos^2 x)dx?

*February 26, 2012*

**geometry**

If you had a room that is 10 foot by 12 foot in the shape of a rectangle, and one gallon of paint covers about 350 square feet, how many gallons of paint would you have to buy if you were painting the walls and the ceiling?

*February 21, 2012*

**GEOMETRY**

Find JK for (3,8) and K(-1, 4).

*February 20, 2012*

**physics**

The 1 kg standard body has an acceleration of 2 m/s^2 at 56 degrees to the positive direction of the x axis. What are the x and y components of the net force on it? What is the net force of the unit-vector notation?

*February 17, 2012*

**literature**

Write two original sentences for each of the following seven sentence patterns: 1.S-V-DO (includes S-V-DO-OC) 2.S-V 3.S-V-IO-DO 4.S-LV-PN 5.S-LV-PA 6.EXPLETIVE-VERB-SUBJECT (inverted sentence) 7.QUESTION PATTERN

*February 14, 2012*

**Trugonometry**

Simplify the expression √x2 +1 as much as possible after substituting tan(θ) for x.

*January 31, 2012*

**Math**

Determine each tangent ratio to four decimal places using a calculator. A) tan 74 degrees B) tan 45 degrees C) tan 60 degrees D) tan 89 degrees How do I figure this out !?

*January 19, 2012*

**physics**

A 15 kg block is pulled 5 m across the frictionless floor with a force of 62 N at a 41 degree angle. Calculate the total work done on the block.

*January 18, 2012*

**geography and world Cultures**

i don't know LMFAOOOOOOOOOOOOOOOOOOO

*January 17, 2012*

**Geometry**

Use the slope of AB to determine which line below, if any, is parallel to AB. A(1,8) B6,-4) a. y = 5/12x + 5 b. y = -5/12x + 5 c. y = 12/5x + 5 d. none

*January 11, 2012*

**Geometry**

Use the slopes of AB and CD to determine whether AB and CD are parallel, perpendicular, or neither. A(-8,5) B(-2,-4) C(6,0) D(0,-4)

*January 11, 2012*

**Geometry**

Find a counterexample to the following definition: An animal with wings is a bird.

*January 10, 2012*

**Geometry**

How can the statement "cars are vehicles" be written as a conditional statement?

*January 10, 2012*

**Geometry**

write two conditional statements that make up the following biconditional statement: "Two lines are perpendicular if and only if their intersection creates 4 right angles."

*January 10, 2012*

**Pre-Cal**

are you sure tan e is correct?? you have to round to 4 places. I got .1005 for it

*December 15, 2011*

**math algebra 2**

(y-3)/2-13=-9 solve for y

*December 14, 2011*

**math algebra 2**

solve for y 5x-y=3z+5y

*December 14, 2011*

**Ben davis**

solve for y 4y+10=12

*December 14, 2011*

**physics/math**

Ahhh! I've seen some examples of this type of problem but I can't seem to solve it! Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The ...

*December 13, 2011*

**Algebra 2**

Find each of the following for x^2+5x+6 and x^2+x-2. a) the LCM b) the GCF

*December 7, 2011*

**Calculus**

A tank is full of water. Find the work W required to pump the water out of the spout. r=6 h=3

*December 5, 2011*

**Calculus**

A tank is full of water. Find the work W required to pump the water out of the spout. r=6 h=3

*December 5, 2011*

**Calculus**

A spring has a natural length of 24 cm. If a 27-N force is required to keep it stretched to a length of 30 cm, how much work W is required to stretch it from 24 cm to 27 cm? (Round your answer to two decimal places.)

*December 4, 2011*

**Calculus**

A spring has a natural length of 24 cm. If a 27-N force is required to keep it stretched to a length of 30 cm, how much work W is required to stretch it from 24 cm to 27 cm? (Round your answer to two decimal places.)

*December 4, 2011*

**calculus**

ç(3x+2) dx

*November 30, 2011*

**calculus**

Evaluate the integral. Express your answer using words or symbols. ç(-2sin x) dx

*November 30, 2011*

**calculus**

Approximate the area in the first quadrant between the x-axis, the y-axis, the line x = 3, and the function f(x) = x^2+1 For this approximation, you must use 6 rectangles of equal width, and this must be a lower sum. In your answer, you must include letters a-d below: a. The ...

*November 30, 2011*

**calculus**

Solve the differential equation below, given the initial condition f(0) = 3. Express your answer using words or symbols. y=-5x^2

*November 30, 2011*

**Business Law**

A Fortune 500 CFO admits to having deliberately treated $4 billion in operating expenses as assets, thereby allowing the corporation to show profits instead of losses. The auditor never detected this. The corporation’s stock drops 95 percent and bond covenants related to ...

*November 27, 2011*

**science - biology**

What is the health advantage that can result in sickle cell hemoglobin?

*November 13, 2011*

**Chemistry**

does nothing

*November 11, 2011*

**Physics**

A block of mass m is being dragged across the floor by a force F. The coefficient of friction between the block and floor is u. Show that if the block is being accelerated by the force F from rest for a time t, the speed of the block at time t can be found from: Vf= (F/m - ug)t

*November 10, 2011*

**algebra**

Find each of the following for x^2+5x+6 and x^2+x-2. a) the LCM b) the GCF

*November 9, 2011*

**calculus**

Find the number b such that the line y = b divides the region bounded by the curves y = 16x2 and y = 9 into two regions with equal area. (Round your answer to two decimal places.)

*November 9, 2011*

**calculus**

Find the number b such that the line y = b divides the region bounded by the curves y = 16x2 and y = 9 into two regions with equal area. (Round your answer to two decimal places.)

*November 9, 2011*

**Social Studies**

I've done research Im just not sure which one would be the best answer I'm really confused

*November 9, 2011*

**Social Studies**

The interaction of private companies trying to make the greatest profit and customers trying to get the best deal is called A) competition B) blind faith C) the invisible hand D) the zero sum game Blind faith means belief without true understanding so I'm pretty sure it&#...

*November 9, 2011*

**Social Studies**

Thank you!

*November 9, 2011*

**Social Studies**

Oh that helps , so the answer is A then .

*November 9, 2011*

**Social Studies**

I'm still not sure

*November 9, 2011*

**Social Studies**

I've read a lot about him , i think it is C but I'm not sure . There is info on him that leads me to other answers as well...

*November 9, 2011*

**Social Studies**

Karl Marx's ideas are the foundation of A) communism B) capitalism C) mercantilism D) fascism

*November 9, 2011*

**career research&decision making**

each occupational field

*November 4, 2011*

**chemistry**

Find the solubility of AgBr in 3.9 M NH3 [Ksp of AgBr = 5.0 10-13 and Kf of Ag(NH3)2+ = 1.7 107]

*November 4, 2011*

**General Chemistry 1**

What is the FBF bond angle for BF^4- ?

*November 3, 2011*

**trig**

Hi, I need to find the domain and rnge of the following: 1. X= 1/2 (cos theta + theta sin theta) Y=1/2 (sin theta - theta cos theta) total guess here, but here goes Domain cos theta = +/- 1 and domain sin theta = +/- 1 so domain theta sin theta = 0- +/-infinity so domain of X...

*October 31, 2011*

**physical science**

how do i find how long the steel is in a 156 kg coil of sheet steel that is .80 mm thick and 50 cm wide.

*October 16, 2011*

**english**

mrs. sally johnson lives in dallas texass whats the capitalization?

*October 15, 2011*

**Pre-Calculus**

I posted earlier and didn't get an answer so I'm posting again-hoping someone could please check these two-I think they're correct Please check my answer: I think it's correct? 1.Find polar form of (-3,2) r=sqrt of (-3)^2 + 2^2)=sqrt (13) = 3.61 tan^-1(2/-3) = ...

*October 13, 2011*

**Pre-Calculus**

Please check my answer: I think it's correct? 1.Find polar form of (-3,2) r=sqrt of (-3)^2 + 2^2)=sqrt (13) = 3.61 tan^-1(2/-3) = 33.79 180-33.79 = 146.31degrees polar points are (sqrt13,146.31degrees) 2. Rectangular form of (3,112degrees) 3cos112= (-1.12) 3sin112=2.78 ...

*October 13, 2011*

**Physics**

Two football players start from rest, 12 m apart. They run directly towards each other, both players accelerating. The first player has an acceleration of 5 m/s^2 and the second has an acceleration of 4 m/s^2. a) how much time passes before they collide? b) at the instant they...

*October 10, 2011*