# Posts by courtney

Total # Posts: 798

**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]

**General Chemistry 1**

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

**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...

**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.

**english**

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

**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) = ...

**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 ...

**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...

**EXP 105 Personal Dimensions of Education**

Someone who likes to fix things without talking or writing about what he is doing is most closely associated with Use First of the ____________ Pattern.

**trig**

a tower standing on level ground is due north of piont N and due west of point W, a distance 1,500 feet from N. If the angles of elevation of the top of the tower as measured from N and W are 8 and 11, respectively, find the height of the tower.

**Economics**

1.Which of the following is NOT a decision that can be made at the margin? whether to grow beans or corn on large farm whether to hire 100 new workers or not whether to leave early in the moring or late in the day whether or not to go on vacation, I think this is the answer, ...

**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).

**math**

what is 1,000m3 mean. how do it get to the answer of 96,050 x 1,000 m3.

**Biology**

What is technolgy?

**Algebra**

Two numbers whose sum is 30 and product is 8800? How do I find that?

**Algebra**

Two numbers whose sum is 30 and product is 8800? How do I find that?

**SCIENCE**

How do you figure out the following ..?::::: Mass Number Number of Protons Number of Electrons (OF A ELEMENT) Number of Neutrons Thanks ~ Courtneeeey (:

**economics**

doubled

**Mathematics**

The lengths of two opposing sides of a square are decreased by forty percent. By approximately what percent would the lengths of the other two sides have to be INCREASED so that the area of the new figure ( a rectangle) is the same as the area of the original square?

**world geography**

why did the south agrican government change its policy of apartheid in 1990 and 1991

**Derivatives**

a pationt recives an injection of 1.5 milligrams of a medication, and the amount remaining in the bloodstream t hours later is A(t)= 1.5e^-0.08t .find the instantaneous rate of change of this amount: a) Immediately after the injection (time t=0)

**Social Studies KKK**

How did the federal government help to reduce the klans's influence in the south?

**world history**

Britain is wrong

**science**

whats the physical form in which a substance exists?

**geometry**

what is the midpoint of a line segment with endpoints at (-4, 15) and (22,3)

**chemistry**

write the formula of each acid and identify each as a diprotic, a triprotic, or a monoprotic acid sulfuric acid,perchloric acid,phosphoric acid,hydrofluoric acid,acetic acid

**World Geography**

What words best describe the Baltic landscape?(there can be more then one answer) a. desert b. flat c. lowland d. marshland e. mountainous f. tropical I think its B E and F Can someone please help?

**Math**

Find the first five terms of each sequence, defined by the given rule. An=6N-2

**Finance- Real Estate....really need help!!!**

A developer is interested in a parcel of land for a small mixed use development. Similar developments are worth $15 million and require the following sequential investments to complete: Phase Description 1 Purch. land, permitting, utilities 2 Build retail 3 build apartment ...

**Real Estate Finance**

A developer is interested in a parcel of land for a small mixed use development. Similar developments are worth $15 million and require the following sequential investments to complete: Phase Description 1 Purch. land, permitting, utilities 2 Build retail 3 build apartment ...

**chemistry**

How many grams of hydrogen peroxide must decompose to give 255 mi of oxygen gas at stp?

**chemistry**

How many grams of hydrogen peroxide must decompose to give 255 mi of oxygen gas at stp?

**Speech**

After analyzing a problem, what is the next step in the problem-solving process? a. Develop creative solutions. b. Identify possible solutions. c. Select a solution. d. Implement a solution. I think it might be B

**Writing**

Thanks!

**Writing**

I have to write my rough draft for a research paper. I have to include a thesis statement and an attention grabber. Can someone give me some examples of attention grabbers please?

**Speech**

the 1st one i picked b the 2nd i picked d

**Speech**

Group communication should be evaluated according to which of the following characteristics? a. Do the group members attain their individual goals? b. Do all members participate in the decision-making process? c. Does the group leader encourage member-to-member interaction? d...

**Speech**

Why is it important for group members to be group-oriented?

**Chemistry**

1.62 g of CoCl2 x (xH20) were heated. After heating only .88g of CoCl2 remained. What was the formula of the original hydrate?

**Chemistry**

how do you find PH of 0.010 M HNO3 solution?

**Managerial Accounting**

Flexible budget planning Sam Yu, the president of Centech Computer Services, needs your help. He wonders about the potential effects on the firm's net income if he changes the service rate that the firm charges its customers. The following basic data pertains to fiscal ...

**trig**

secx=5 use a graph to solve the following equation in the interval x is greater than -pie but less than pie

**Business Law**

I'm having trouble figuring out this question. I can't think of a legal theory that would apply in this case. If anyone could help me out, that would be great! Fidelity Mortgage sells a mortgage on Doug Quicksilver's home to Enterprise Bank. Enterprise erroneously ...

**intro to statisics**

78% of US homes have a telephone answering device. In a random sample of 250 homes, what is the probability that fewer than 50 do not have a telephone answering device. Courtney, 2nd yr college

**physics**

The total energy of a 2.00 kg falling rock is 5000 J. If its potential energy is 1975 J, the kinetic energy of the rock is ____ J. The speed of the rock is ___ m/s

**algebra 2**

how do i graph: y(less than or equal to)-6ãx

**World Geography**

Which of these statments describe NATO? 1. NATO's preferred method for resolving conflict is through military defense. 2. NATO's original purpose was to defend its members from Soviet aggression. 3. NATO's members include the U.S. and Canada. 4. NATO was disbanded ...

**World geography**

This period was a time of great political unrest, which divided Europe into eastern and western sections. a. Cold War b. Imperialist c. Middle Ages d. Yalta Conference

**Geography**

What caused the fall of the Roman Empire? a. defeat by Greece in the Pyrrhic War b. lack of cultural cohesion c. land region was too large to defend d. peasant rebellion

**World Geography**

What about polotics, culture and settelment patterns? What could any of these have to do with water in western europe? Im highly confused..

**World Geography**

What is western europe economy like? What has water done to effect the economy?

**forest hill**

what follows a likning or action verb?

**english**

thesis statement on jack the ripper

**Chemistry**

When 1.O M solution of NaCl at 25 degrees C, is heated to 55 degrees C the: A) density increase and the molarity increases B) density increases and the molarity decreases C) density decreases and the molarity decreases

**calculus**

tangent line and normal line of y=(sqrtx)/(x+1) when p=(4,2/5)

**Physics**

Kim is tuning a piano. She strikes a 440 Hz tuning fork and a string at the same time and hears 4 beats per second. a) What are the possibe frequencies of the string? b)She tightens the string a little then repeats. She now hears 1 beat per second. What is the frequency of the...

**Physics**

An ob ject is released from rest on a planet that has no atmosphere. The ob ject falls freely for 5.04 m in the ﬁrst second. What is the magnitude of the acceleration due to gravity on the planet?

**Physics**

An automobile with an initial speed of 3.56 m/s accelerates uniformly at the rate of 2.7 m/s2. Find the displacement of the car after 4.1s.

**Grammar**

Please explain how to break down a sentence. Simple predicate/Simple Subjects. My mom hasn't done this for a long time and is clueless! Thanks for the help.

**physics**

what is the magnitude of the electric field produced by a charge of magnitude 8.00 uC at a distance of 1.00 m?

**Chemistry**

What mass of 3.0 wt% H2O2 solution is required to provide a 25% excess of reagent for the following reaction with 12 dietary iron tablets that contain ~15 mg of iron per tablet?

**Chemistry**

If the mass of isolated Fe2O3 were .300 g, what is the average mass of iron per tablet?

**Chemistry**

If each tablet of a dietary supplement contains ~20 mg of iron how many tablets should we analyze to provide ~.50g of Fe2O3?

**Algebra 1**

how do u find the slope of a line

**chemistry**

A ballon has a circumference of 42 cm what should the volume be in centimeters cubed?

**Secondary Math for teachers**

I need to know what are six functions related to the equation distance = rate x time

**Algebra 1 8th grade**

Can a graph that is in a complete circle possibly have a function

**Math**

Thank you!!!

**Math**

can someone explain this please? Identify whether each graph represents a function. Explain. If the graph dose represent a function is the function linear? the coordinates are (0,5) (1,0) (2,-3) (3.-4)(5,0) (6,5)

**reading**

how do you describe the use of poetic devices and identify ann example

**8th grade American History**

Thank You

**8th grade American History**

For my school assignment I am to create a Facebook for George Washington. Anyone have an idea of people I could put in his friends list?

**Music**

dose anyone know who influenced black sabbath?

**8th grade history**

thank you

**8th grade history**

Can anyone help explain this? when the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of earth the separte and equal stations to which the laws of nature and of ...

**College Algebra**

Solve for C 2a=(5b-c)/(3c+1)

**College Algebra**

No. I swear its on my final for college algebra. I know the answer is 3.028

**College Algebra**

Directions: Find the REAL solutions of the equation x^3-2.6x^2=3.93 Please help, its for my final!

**social studies**

show me a pie chart with the population and land ownership of france in 1789

**algebra**

Thats just what the directions say.. But thank you so much, You Rock!!

**algebra**

College Algebra Directions: Solve graphically: x^(2/3)+x^(1/3)-2=0 I just don't know how to approach this?!

**Math**

i have no clue honestly i tried doing the second part B and i do not get it?

**Math**

I do not understand the second part how do i get the second part?

**Math**

Losing your bags during airline travel is not all that uncommon. Recently, an airline was sited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 14 customers for that airline and observing whether they had lost their baggage. Provide ...

**Math help**

what do i need to do next i donot understand the second part?

**Pre Calc**

Determine how many orders of magnitude the quantities differ. A canary weighing 20 g and a hen weighing 2 kg. I want to say 1 but I am not sure...

**physics**

4.56

**science fair ideas**

thank you

**science fair ideas**

PLZ help i have a science project due in less than a week and still have no idea what im going to do dose anyone have ideas for zoology science experiments?

**pre algebra**

you spend a total of 25 minutes typing an email and writing a letter. you can type 6o words a minute and write 20 words a minute. let m be the minutes you type the email. write an expression in terms of m for the total number of words you wrote. evaluate the expression if you...

**math**

you spend a total of 25 minutes typing an email and writing a letter. you can type 6o words a minute and write 20 words a minute. let m be the minutes you type the email. write an expression in terms of m for the total number of words you wrote. evaluate the expression if you ...

**Physics**

When a carpenter shuts off his circular saw, the 10.0-inch diameter blade slows from 4665 rpm to zero in 2.00 s. What is the distance traveled by a point on the rim of the blade during the deceleration? (in ft). What is the magnitude of the net displacement of a point on the ...

**language arts**

is the a verb adjective or adverb for the word politics

**Physics**

The angular speed of a propeller on a boat increases with constant acceleration from 11 rad/s to 26 rad/s in 2.4 seconds. Through what angle did the propeller turn during this time?

**STATISTICS HELP PLEASE!**

suppose you wish to estimate a population mean based on a random sample of n observations, and prior experience suggests that sd=12.7. if you wish to estimate the mean correct to within 1.6, with probability equal to .95, how many observations should be included in your sample?

**Forensics**

What is a follicular tag and how can it be used to implicated a suspect of a crime?

**Math (hard)**

Postcard stamps are 20 cents each, while letter stamps are 33 cents each. If you have 50 stamps worth $12.60, how many of each type do you have? I don't even know where to begin with this Q.

**STATISTICS PLESE HELP!!**

studies indicate that drinking water supplied by some old lead-lined city piping systems may contain harmful levels of lead. an important study of the Boston water supply system showed that the distribution of lead content readings for individual water specimens had a mean and...

**geometry**

How do you find the slope-intercept form for 3y+2x+12=0?

**6th grade**

1-5/8