Friday

January 30, 2015

January 30, 2015

Total # Posts: 974

**Chemistry**

213,000 years
*December 11, 2012*

**Science- Chemistry**

Determine the type of bonding in each substance. a. Zinc, Zn (s) b. Propane, C3H8 (l) c. Calcium Carbonate, CaCO3 (s)
*December 11, 2012*

**math steve**

Hi Steve When you have time can you please step in how did you resolve this problem? Reason to follow up is how did you get 2's and 3's Thx K
*December 9, 2012*

**math**

7.86x4.6
*December 5, 2012*

**Physics**

A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, he decides to perform a simple experiment at the indoor firing range. The soldier hangs a target a distance of d = 101 m from the end of the barrel. The rifle is...
*December 5, 2012*

**Chemistry**

What hybrid orbital is the result of mixing a 1s orbital and 2p orbitals?
*December 3, 2012*

**Chemistry**

What is the electronic geometry of a central atom with 4 electron pairs?
*December 3, 2012*

**pre algrbra **

a=16
*November 28, 2012*

**Physics**

A warehouse employee used a cable to pull a 125 kg crate across the floor. the angle between the cable and the floor was 25°. The magnitude of the pulling force was 185 N. The coefficient of kinetic friction between the crate and the floor was 0.27. A)What was the weight ...
*November 27, 2012*

**algebra**

I need someone to check my work not sure if I'm doing this right. The design of a digital box camera maximizes the volume while keeping the sum of the dimensions at 6 inches. If the length must be 1.5 times the height, what should each dimension be? HINT: Let x represent ...
*November 26, 2012*

**algebra**

I NEED HELP!! The table shows the annual consumption of cheese people in the United States foor selected years in the nineteenth century. What cubic model best fits this data? Year Pounds Consumption 1915 4.156 1922 4.857 1946 7.16 1991 29.989
*November 26, 2012*

**Chemistry105**

How many grams of NaCI are therein exactely 25.00 mL of a 0.1053 M solution of the salt?
*November 25, 2012*

**Chemistry**

Thank you so much!
*November 18, 2012*

**Chemistry**

Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?
*November 18, 2012*

**Algebra**

Ray and Stella are both given jobs by the same company. Ray is to be paid a basic salary of $3000 each month. He will get a raise of $100 after the first month and every month thereafter he will get a raise of $100 more than the preceding month. Stella will be paid a basic ...
*November 18, 2012*

**Algebra**

Barbara and her husband take a trip on a highway, a distance of 600 miles. They intend to average 60 m.p.h. and take 10 hours. However, they take 11 hours due to construction. When they encounter the construction, they reduce their speed to 40 m.p.h. and proceed at this speed ...
*November 18, 2012*

**Algebra**

Jamie ran two laps around a track in 99 s. How long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s?
*November 16, 2012*

**Algebra**

Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
*November 16, 2012*

**Algebra**

Jan can run at 7.5 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
*November 16, 2012*

**calculus**

1)A function g is defined for all real numbers and has the following property: g(a+b) - g(a) = 4ab+2b2 find g'(x) A)4 B)-4 C)2x^2 D)4x E)does not exist not so sure where to start 2)If d/dx[f(x)] = g(x) and d/dx[g(x)] = f(3x, then d^2/dx^2 [f(x^2)] is A)4x^2 f(3x^2) + 2g(x^...
*November 15, 2012*

**math**

kevin has a rabbit,a ferret,a gerbil,and a turtle. he feeds them in a different order every day. in how many different orders can kevin feed his pets
*November 13, 2012*

**Physics Lab Question, Help Please**

Two speakers, A and B, are emitting identical, synchronized (in-phase) sound waves at 240kHz. A person standing a point C hears a relatively loud sound. She then starts walking towards point D, and notices the sound gets quieter, reaching a minimum when she arrives at D. The ...
*November 12, 2012*

**Algebra**

An apple orchard charges a fixed amount for the first four bushels of apples purchased and an extra amount for each additional bushel purchased. If the cost of 11 bushels of apples is $33 and the cost of 19 bushels is $55, what is the fixed charge for the first four bushels of...
*November 10, 2012*

**math organized list**

tonya and lauren are desinging a soccer uniform they want to use two colors on the shirt their choices are green orange yellow purple blue and silver how many ways can they choose two colors?
*November 8, 2012*

**math algebra**

Mrs. martinez has $10,000 to invest.One bank offers her a return of 7.5% on the whole sum. Another bank offers her a return of 8% on part of the sum, and 6% on the rest of the sum. How much of the $10,000 would need to be invested at 8% at the second bank, for the overall to ...
*November 7, 2012*

**Trigonometry **

How do u find the angles of a triangle whose sides are in the ratio 2:4:5?
*November 6, 2012*

**Physics**

how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m?
*November 5, 2012*

**Physics**

Thank ya chile
*November 5, 2012*

**Physics**

how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m?
*November 5, 2012*

**university of phoenix**

appendix e1 diagram IT/240
*November 5, 2012*

**physics**

A wet towel of mass 4 kg is hung in the center of a 6 m clothesline, so that the line makes an angle 10o with the horizontal. The tension in the line is closest to... 50N, 40N, 100N, 200N, or 10N
*November 3, 2012*

**college physics**

A 90 kg rock climber is stationary off the side of an overhanging cliff hanging onto her climbing rope. Another rope is tied to her foot and is attached at the other end to her 30 kg rock-climbing dog, also hanging out 2 m below her. Tied to the dog’s foot is yet another ...
*November 3, 2012*

**college physics**

A wet towel of mass 4 kg is hung in the center of a 6 m clothesline, so that the line makes an angle 10o with the horizontal. The tension in the line is closest to... 50N, 40N, 100N, 200N, or 10N
*November 3, 2012*

**Algebra**

i'm a 2 digit number. the sum of my digit Is 12.my tens digit is 4 more than my ones digit. what numberam i ?
*November 2, 2012*

**Math problem**

Mrs. Jones owns 4/7 of the stock in a small business and Mrs.Brown owns the rest. Mrs. smith agrees to give $21,000 in exchange for 1/3 of the stock. The $21,000is to be divided between Mrs. jones and Mrs. Brown so that all three will now have equal share of stock. How much of...
*October 29, 2012*

**Algebra**

If (8c-7d)/(d)=2, find the value of (5c-6d)/(2c)
*October 29, 2012*

**Accounting**

Inventory as of Nov. 30th, 2010, consists of 20 bikes costing $550 each. Balance Sheet: Nov. 30th 2010. Cash-9150 Debit Accounts Receivable-12300 Debit Inventory-11000 Debit Supplies-900 Debit Office Equipment-18000 Debit Accumulated Depreciation, Office Equipment- 3000 Credit...
*October 25, 2012*

**science**

These are the 3 questions that will help me study for my test. i need help understanding each of these thankyou :) Distinguish between microevolution and macroevolution. Explain how forest organisms (producers and consumers) separated by a highway could evolve into different ...
*October 22, 2012*

**Statistics**

In Professor White’s statistics course the correlation between the students’ total scores before the final examination and their final examination scores is r = 0.9. The pre-exam totals for all students in the course have mean 275 and standard deviation 50. The final...
*October 21, 2012*

**Math**

Just wondering what did you do in this log((7x-3)(25)/(x+3) = 2 to get 25(7x - 3)/(x+3) = 10^2 = 100?
*October 20, 2012*

**Math **

solve log(7x-3)+2log(5)=2+log(x+3) I've attempted to do this question and I ended up with log(7-3)+log(5^2)-log(x+3)=2 but I don't what to do next or whether I did something wrong.
*October 20, 2012*

**Chemistry**

A spaceship from another planet travels at a speed of 4.27 googs/mulm. There are 256 googs in a meter and 8000 mulum in one hour. What is the spaceship speed in meters per second?
*October 16, 2012*

**Help please!! History**

the crusades
*October 16, 2012*

**chemistry**

In a 100g sample of copper, 69 g were Cu-63 while 31g were Cu-65. Find the average atomic mass.
*October 14, 2012*

**math**

How did u get 9 and u didnt answer my question
*October 13, 2012*

**Math **

(x-3) is a factor of x^3+ax^2+bx-3 but when divided by x+2 the remainder is 15 Solve for A and B I know that A is 1 and B is -11, but I don't understand how to solve it
*October 11, 2012*

**algebra**

simplify the expression. Justify each step. (m+4.5)-0.5
*October 8, 2012*

**Math**

no,you are incorrect the correct answer is 7and a half more minutes
*October 8, 2012*

**chemistry**

A 2.33-g sample of a mixture of CaCl2 and Ca(NO3)2 is treated with excess AgNO3(aq). The precipitate is filtered off, dried and weighed. The dried precipitate weighs 3.9 g. What is the percentage by mass of CaCl2 in the original mixture?
*October 7, 2012*

**assessing development cognitive language observat**

foster language
*September 28, 2012*

**math**

2x-4+x-5 Please explain
*September 23, 2012*

**math**

2x-4+x-5 Please explain
*September 23, 2012*

**English**

I am diagramming the sentence: It was excellent from beginning to end. I know the subject is "It", verb "was", subject complement is "excellent" and, I think "from beginning to end" is a prepositional phrase. Am I right or please corrent...
*September 19, 2012*

**algebra**

the office manager of a small office ordered 120 packs of printer paper.based on average daily use, she knows that the paper will last about 40 days. what graph represents this situation? how many packs of printer paper should the manager expect to have after 10 days? paper [ ...
*September 17, 2012*

**algebra**

on number 3 y=kx so would i divide y by x and if so I get 1.57, 1.62, 1.66, and 1.7..Is this right?
*September 17, 2012*

**algebra**

I have a few questions that I don't understand hope someone can help. 1)write an equation of th line, in point slope form, that passes through the two given points. (-17,8),(3,-2) I figured (y-8)=-2(x+17) not sure 2) the graph of g(x) is f(x) vertically compressed by a ...
*September 17, 2012*

**chemistry**

In part B of my question, I was asked calculate the number of atoms in 0.615 mol of 13C (mass number of this Carbon is 13). I received the correct answer of 3.70E23 atoms. However, I do not know how to do Part C of my question, which asks "Based on your answer in Part B, ...
*September 16, 2012*

**Physics**

Which of the following best describes kinematics? a) Kinematics is a part of mechanics that involves the description of motion. b) Kinematics is the branch of physics that deals with the motion of objects and the action of forces on the objects. c)Kinematics is the study of ...
*September 14, 2012*

**math**

my daughter is working on 5n + 2n - (3-10N) can someone walk me thru how to solve problems like this I have not been in school in over 20yrs. I think you have to work () first? but really do not know HELP please thank you
*September 13, 2012*

**math**

Ms.sue may I just know the curtisy of why you help students on this website for years are you a retired algebra teacher
*September 13, 2012*

**math**

Ms.sue may I just know the curtisy of why you help students on this website for years are you a retired algebra teacher
*September 12, 2012*

**math**

Ms.sue may I just know the curtisy of why you help students on this website for years are you a retired algebra teacher
*September 12, 2012*

**algebra**

what is the equation of the given line in standard form. use integer coefficients y=-1.7x+8.5 Please explain not understanding
*September 10, 2012*

**algebra**

Thank you for the help
*September 10, 2012*

**algebra**

what is an equation of the line in point slope form that passes through the given point and has a given slope.(8,-8);slope 3. caon someone explain
*September 10, 2012*

**algebra**

Thanks for the help
*September 10, 2012*

**algebra**

write an equation of the line in point slope form that passes through the two given points.(-2,15),(9,-18).Please explain
*September 10, 2012*

**physics**

i.imgur. com/cqwun. png
*September 9, 2012*

**physics**

i.imgur . com/jXIYL. png is it 20 and 10??
*September 9, 2012*

**physics**

what is the displacement of the ball? i.imgur. com/8ljWh . png i don't know calculus!
*September 9, 2012*

**algebra**

Solve the equation check for extraneous solutions 9[9-8x]=2x+3 please explain
*September 8, 2012*

**algebra**

Evaluate the expression for the given value of the variable(s) [-4b-8]+[-1-b^2]+2b^3; b=-2
*September 8, 2012*

**algebra**

I got that but what I don't understand is the possible answers are y=9/10x+9/10;slope;9/10;y-intercept;9/10 y=9/10x-9/10;slope;9/10;y-intercept;9/10 y=-9/10x+9/10;slope;9/10;y-intercept;9/10 y=9/10x-9/10;slope;9/10;y-intercept;-9/10
*September 8, 2012*

**algebra**

-9x+10y=-9 write the equation in slope-intercept form, what are the slope and y-intercept. I have tried to figure this out but cannot come up with correct answer please help
*September 8, 2012*

**english**

The statement below represents which genre from the early american and colonial period. I want to explain origins of the natural world and its processes. the poetry of anne bradstreet the oral tradition of native americans the journals of william bradford the essay of thomas ...
*September 7, 2012*

**Math**

Rules for counting significant figures are summarized below. Zeros within a number are always significant. Both 4308 and 40.05 contain four significant figures. Zeros that do nothing but set the decimal point are not significant. Thus, 470,000 has two significant figures. ...
*September 7, 2012*

**Physics**

What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^-4. Used Eq. A = (pi)(d^2)/4 => A = (pi)(6.43 * ...
*September 7, 2012*

**Physics**

Suppose you are asked to determine the perimeter of a seven-sided irregular figure. You make the following measurements: Side 1 = 3.2 m Side 2 = 4.8 m Side 3 = 2.000 m Side 4 = 8.94 m Side 5 = 11 m Side 6 = 7.566 m Side 7 = 4.0 m How many significant figures should there be in...
*September 6, 2012*

**Physics**

Suppose that an environmental study determines that a town produces approximately 2,000 lb of trash each day. The study group decides to convert their findings to SI units, using the conversion 1 lb = 0.4536 kg. They report that the town produces 907.2 kg of trash each day. ...
*September 6, 2012*

**physics**

thanks for the assistance, but apparently none of the answers are correct according to my homework checker.
*September 4, 2012*

**physics**

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a speed...
*September 4, 2012*

**physics**

(a) What was the initial velocity of the stone? (b) How tall is the building? sorry I added the question to another post, but here it is. Thanks :)
*September 4, 2012*

**physics**

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a ...
*September 4, 2012*

**algebra**

evaluate the expression for variables -(4h-1)/1+h;h=2 /-4b-8/+/-1-b^2/+2b^3;b=-2 9c-6d+4c-3d 9/9-8x=2x+3 If anyone could please help me, these I have not been able to figure out. Any help is appreciated. Thank you
*September 3, 2012*

**algebra**

-8<=2x-4<2 solve the compound inequality can someone please expplain this?
*September 3, 2012*

**algebra**

to which set of numbers does the number belong 1.) 5/4 irrational integers rational natural 2.)graph the number on a number line 2/5 I don't know how to do these ones if someone could help and explain
*September 3, 2012*

**algebra**

it's asking to identify a pattern and find the next number in the pattern. 1.) 31,24,17,10 4 -3 -2 3 2.) 0,4,2,10,50 450 250 5 50 If someone could help would appreciate but would like an explanation on how you get it so I can learn. Thanks ahead.
*September 3, 2012*

**Physics**

Can someone help me with this conversion question? Suppose you are told that 15 quarts (qt) = 14.2 liters (L). What is the conversion factor you would use to convert from quarts to liters? What is the conversion factor you would you use to convert liters to quarts? 1) quarts ...
*September 2, 2012*

**poetry**

Line from "To Her Father With Some Versus", Yet for part payment take this simple mite possible answers 1)bedbug 2)a coin of little value ** 3)physical strength 4)possibility How many couplets are in this poem? 1)five 2)six 3)seven 4)fourteen*** Which of the ...
*August 26, 2012*

**math**

solve equation then check for extraneous solution please someone explain this to me. 6/6-4x/=8+4 then one that is solve the inequality s/x+3/4<2 I don't understand these problems and then it says to graph
*August 26, 2012*

**math**

absolute value equation 2/3x-5/-8=8 Can someone help do not understand
*August 26, 2012*

**Math**

If the side of am inverted square pyramid has a length of 75m, what is the lengths of a diagonal?
*August 24, 2012*

**algebra**

Which set of numbers does -55 belon? natural whole integers irrational i'm not sure but leaning towards natural or whole. Can someone please help?
*August 23, 2012*

**business**

Which one of the following tools includes the specific tasks and duties to be performed by an employee? a. job analysis b. job specification c. job description d. skills inventory my answer is B is it correct ??
*July 10, 2012*

**chemistry**

When a 3.90-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 24.5°C to 19.3°C. Calculate DH (in kJ/mol NH4NO3) for the solution process NH4NO3(s) ---> NH4+(aq) + NO3-(aq) Assume that the specific...
*July 4, 2012*

**Spanish**

How can I tell how to change the ending on the words? would number 2 be intersen?
*July 3, 2012*

**Spanish**

ESTRUCTURA | 13.1 The subjunctive with verbs of emotion Emociones Completa cada oración con la forma correcta del verbo apropiado de la lista. Usa cada palabra sólo una vez The words in () are my guess. I need help with clarification and spelling changes. Word ...
*July 3, 2012*

**Spanish**

1. haber 2.va 3.resolver, Im not sure about the rest :(
*July 3, 2012*

**Spanish**

13.2 The subjunctive with doubt, disbelief, and denial Completar Completa cada oración con la forma correcta del verbo apropiado de la lista. word bank haber ir llegar querer resolver ser 1. No creo que el gobierno el problema de la contaminación rá...
*July 3, 2012*

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