Thursday

September 18, 2014

September 18, 2014

Total # Posts: 1,358

**chemistry**

i get 4.207 g Cu
*June 18, 2012*

**chemistry**

suppose 250 mL of a .433 M solution of CuCl2 is electrolyzed. how long will a current of 75A have to run in order to reduce the concentration of Cu2+ to .167M? What mass of Cu will be deposited on the cathode during this time?
*June 18, 2012*

**Chemistry**

Ammonia, NH3, is a stronger ligand than Cl- but weaker than CN-. Complete the balanced equations for the reactions that are predicted to occur. CoCl6^3- (aq) + CN- (aq) ---> Co(NH3)6^3+ (aq) + Cl- (aq) ---> Co(CN)6^3- (aq) + NH3 (aq) --->
*June 13, 2012*

**Math**

Please round the number 43,678.426785 to the nearest ten thousand
*June 12, 2012*

**math**

4. Gregory teaches martial arts. He charges a one-time processing fee of $5.00 and the cost of the classes is shown below. Let x represent the number of classes and y represent the cost of classes. Based on this information, what will it cost to take 10 classes? Cost of ...
*June 7, 2012*

**Math**

What is the length of a segment whose endpoints are (5, -8) and (9,2). Please explain to me what the formula or rules for working this problem.
*June 5, 2012*

**Math**

Simplify x^2 - 9x + 18/ x^2 - 6x + 9 for all values of x for which the expression is defined. A. x-3/x-6 B. x-6/x-3 C. x-1/x+9 D. x+9/x-1 Please explain how you work this problem in detail. Thanks.
*June 4, 2012*

**math**

Marna wants to find the values of x for which the funciton below will have a value of 10. f(x) = x^2 + x - 20. Which of the following shows the correct factorization of this funciton for f(x) = 10. A. (x + 5) (x + 4) = 10 B. (x - 5) (x - 4) = 10 C. (x + 6) (x - 5) = 0 D. (x + ...
*June 4, 2012*

**Math**

Vanessa has 17 quarters, 8 dimes, 15 pennies, and 14 nickels in a piggy bank. Which of the following measures of central tendency will change if she spends 4 quarters to get a soft drink? Mean, median, mod, or none will change? Why?
*June 3, 2012*

**Alg I**

One type of decorative ribbon regularly costs $3.59 per yard. When the ribbon is on sale, it cost $2.19 per yard. Which is the closest to the difference in the cost per inch for the ribbon when it on sale compared to its regular price? A. 1.9 cents per inch B. 3.8 cents per ...
*June 3, 2012*

**Alg I**

Please explain how to solve: Laura can pressure wash her driveway at an average rate of 15 square feet per minute. Which is closest to this rate in square yards per second? A. 0.35 B. 0.24 C. 0.03 D. 0.01
*June 3, 2012*

**Finance**

Firm A has $20,000 in assets entirely financed with equity. Firm B also has $20,000 in assets, financed by $10,000 in debt (with a 10 percent rate of interest) and $10,000 in equity. Both firms sell 30,000 units at a sale price of $4.00 per unit. The variable costs of ...
*May 29, 2012*

**medicinal chemistry**

the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in 0.10mol dm^-3 sulphuric acid.Thanks!
*May 28, 2012*

**medicinal chemistry**

the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in pure water
*May 28, 2012*

**writing**

i need synonyms, antonyms, and sentences that use the following words please: illusion consecutive horizon thank you so much!
*May 21, 2012*

**writing**

what are some antonyms and synonyms for the words: illusion (noun) horizon (noun) consecutive (adjective) debut (noun) gross (adjective) monastery (noun) thank you!
*May 21, 2012*

**Chemistry**

Arrange the ions: Cu^2+, Ni^2+, Mg^2+, & Zn^2+ in order of decreasing ability to be reduced... & in order of decreasing ability to be oxidized
*May 20, 2012*

**math**

what is the answer to did you hear about... on worksheet page 106
*May 15, 2012*

**Health**

Can you please check these sentences? Thank you, Writeaacher! 1) You must be respectful of your classmates and of your teachers. You should stand up when teachers (or your teachers?) enter the classroom. 2) You mustn't drink or eat during lessons but you can do it during ...
*May 15, 2012*

**Health**

Writeacher, could you please check if these statements on school rules (and the alternatives) in brackets are possible. Thank you 1) You must have your report card every time (correction: always with you) You must wear your tracksuit if you have PE. 2) You must park your ...
*May 15, 2012*

**math (2nd Try)**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? These are my options: domain: 1<s<6 Range: 24&...
*May 11, 2012*

**math**

A ball is kicked from ground level into the air. Its height y, in feet, after x seconds can be represented by the equation y = 40x -16x^2. What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches grond level again? Is the answer - 25 s
*May 11, 2012*

**math**

An olympic swimmer is having his laps timed during practice. To be aware of his progress, the results are shown as order pairs (l, t) below: (1,19), (2,38), (3,57) (4,76). Which equation represents t, the time in seconds, as a function of l the number of laps that the swimmer ...
*May 10, 2012*

**Math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? These are my options: domain: 1<s<6 Range: 24&...
*May 10, 2012*

**math**

Thank you so much for explaining it so well.
*May 10, 2012*

**math**

The out-of-pocket costs to an employee for dental insurance and dental expenses for one year are as follows: Premium, $4000; Deductible, $300; Co-payment, 17% (after the first $300 the employee has to pay). According to the plan outlined, total annual dental care costs, c, ...
*May 10, 2012*

**math**

The value of a $20,000 car decreases every year, t. The equation below models this situation. 20000(1 - 0.04t) = 13,000 After how many years will the car be worth $13,000? Round to the nearest tenth if necessary. I was instructed that the answer is t = 8.75. How do I set it up...
*May 7, 2012*

**Biology**

In pea plants the colour of the peas is genetically controlled. Each pea represents a separate fertilisation. Smooth texture (S) is dominant to wrinkly (s) and green (G) colour is dominant to yellow (g). Following a breeding experiment with pea plants, the following ratio of ...
*May 2, 2012*

**Chemistry**

equivalence point
*April 29, 2012*

**Chemistry**

This volume of base and its corresponding pH is known as the______
*April 29, 2012*

**Life Orientation**

Ways in which Air pollution impact on the community
*April 29, 2012*

**Health, Safety ,and Nutrition**

sorry I'm working in the dark with a keyboard thats broken, but thats no excuse thanks for the reminder. I think it is flexability.
*April 28, 2012*

**Health, Safety ,and Nutrition**

A childs ability to jumpfor distance is an example of Agility or Flexability
*April 28, 2012*

**Health, Safety ,and Nutrition**

thank you Ms. Sue
*April 28, 2012*

**Health, Safety ,and Nutrition**

Which is a suitable toy for a toddler ? A a riding toy or B a walker I think it is A.
*April 28, 2012*

**Saftey, and Nutrition**

oops
*April 28, 2012*

**Saftey, and Nutrition**

B physcal is correct
*April 28, 2012*

**Saftey, and Nutrition**

A child who struggles to climb into a chair is confronting what kind of hazzard? B physcal or D enviromental
*April 28, 2012*

**Health, Safety ,and Nutrition**

Well its either C or D but my guess is the ceramic because we cook with stainless steel
*April 28, 2012*

**Health, Safety ,and Nutrition**

im not sure i cant find it in the text
*April 28, 2012*

**Health, Safety ,and Nutrition**

I dont think its A because we use styrofoam daily at work......
*April 28, 2012*

**Health, Safety ,and Nutrition**

children should not be served drinks in containers made of A. styrofoam B. uninsulated paper C. treated ceramic D. stainless steal
*April 28, 2012*

**Health, Safety, and Nutrition**

It s not A
*April 28, 2012*

**Health, Safety, and Nutrition**

A child who hasnt learned prerequisite fundamentals needed for a combination of motor patterns is suffering from A anxiety B poor mscle control C proficiency barrier D nonacquisition barrier
*April 28, 2012*

**child developement**

Is a correct?
*April 28, 2012*

**child developement**

A child throws a ball with speed and accuracy when he throws a ball to his teacher but his throws are slower and less accurate when plays with a group of friends. This difference is explained by A. classical stage theory B. probility theory C. locomotion-x theory D, Piaget,s ...
*April 28, 2012*

**child development**

A child who hasnt learned the prequisite fundamentals needed for a combition of motor paterns is suffering from A. anxiety B. poor muscle control C. proficiency barrier D.nonacquisition barrier
*April 28, 2012*

**Physics**

thanks!!!
*April 28, 2012*

**Physics**

Several volcanoes have been observed erupting on the surface of one of Jupiter's closest moons. Suppose that material ejected from one of these volcanoes reaches a height of 4.96 km after being projected straight upward with an initial speed of 132 m/s. Given that the ...
*April 28, 2012*

**math**

There are two answers to chose from: A: 16.95 B: 79.05 Which is horizontal?
*April 26, 2012*

**math**

Landon is standing in a hole that is 6.7 ft deep. He throws a rock and it goes up into the air, out of the hole, and then lands on the ground above. the path of the rock can be modeled by the equation y= -0.005x^2 + 0.48x - 6.7, where x is the horizontal distance of the rock, ...
*April 26, 2012*

**math - Help**

The value of a $20,000 car decreases every year, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct...
*April 23, 2012*

**math - Additional Info**

The value of a $20,000 car decreases every, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct ...
*April 22, 2012*

**math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range is reasonable for the function?
*April 21, 2012*

**math**

I understand most of the explanation except the part below: n log .96 = log .65 n = -.187/-.0177 Could you please explain? Thanks
*April 21, 2012*

**math**

The value of a $20,000 car decreases every, t. The equation below model this situation. 20,000(1-0.04t) = 13,000 How many years will the car be worth $13,000? Round to the nearest tenth if necessary. I got 20,000(.96t)= 13,000, but I don't believe gives me the correct ...
*April 21, 2012*

**math**

You are planting a rectangular garden. It is 5 ft longer than 3 times its width. The area of the garden is 250 ft^2. Find the dimensions of the garden. I set it up like this: 3x +5 = 250 where x=8l.7. Is this correct so far, if so what do I do next? Thanks
*April 21, 2012*

**math**

The length of an open-top box is 4 cm longer than its width. The box was made from a 480-cm^2 rectangular sheet of material with 6cm by 6cm squares cut from each corner. The height of the box is 6cm. Find the dimensions of the box. Please show me in detail how to set this up ...
*April 21, 2012*

**Geometry**

What is the volume of a horizontal cylinder whose radius is 2.6 yd,and length is 8.4 yds to the nearest tenth of a cubic yard using 3.14?
*April 20, 2012*

**math**

Answer by factoring a quadratic equation. The length of an open-top box is 4 cm longer than its width. The box was made from a 480-cm^2 rectangular sheet of material with 6cm by 6cm squares cut from each corner. The height of the box is 6cm. Find the dimensions of the box. ...
*April 18, 2012*

**Math - 2nd try**

Please show me how to set up and solve: You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range is reasonable for the function? math - ...
*April 18, 2012*

**math**

The value of a $20,000 car decreases every year, t. the equation below models this sitution: 20000(1 - 0.04t) = 13,000. Please explain how to work this problem.
*April 18, 2012*

**math**

What domain and range is reasonable for this function?
*April 18, 2012*

**Geometry**

How do I find the perimeter of the rectangle (l=10.6in and h=6.1 in
*April 16, 2012*

**Math**

Solve for x in the following proportion x/60= 9/5
*April 15, 2012*

**Math**

1/14 + 3/16 + 4/14
*April 14, 2012*

**Math**

If you are in a hot-air balloon at a height of 100 meters, you can expect to see ____ km. Round your answer to the nearest kilometer and enter only the number.
*April 13, 2012*

**math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144 cookies from 6 cups of ...
*April 13, 2012*

**math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
*April 12, 2012*

**math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
*April 12, 2012*

**Math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144 cookies from 6 cups of ...
*April 12, 2012*

**Math**

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
*April 12, 2012*

**math**

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144 cookies from 6 cups of ...
*April 12, 2012*

**math**

Which value below is a possible solution to the compound inequality 0<3x<30? A. 5 B. 3.2 C. 45 D. -17 If you are substituting these number for x, then C and D do not apply; however, A and B both work. Is this how I should be doing it?
*April 12, 2012*

**math**

Thank you for being so detailed. It helped to understand how to solve the problem.
*April 12, 2012*

**math**

What equation do you get when you solve v-m = v+nx for x How did you work this problem?
*April 12, 2012*

**math**

These are my choices of answers: A. c = (wz)/(m+y) B. C = (Wz+Y)/m C. C = wz-m-y D. c = wz+y+m This is where I get confused. Do I bring the wz and put on the top of m+y? Please explain. Thank you so much.
*April 11, 2012*

**math**

Show the formula correctly being solved for the variable c. W = (c + m +y)/z
*April 11, 2012*

**math**

Please solve and explain how to solve the compound inequality: 4 < 4a +3 < 18
*April 11, 2012*

**math**

Thank you so much for explaining it in detail. I really appreciate it.
*April 11, 2012*

**math**

Reiny, I'm not sure how to do that.
*April 11, 2012*

**math**

Which of the following equations represents the equation for the line that is parallel to the given line and passes through the given point? y= 1/5 x - 10; (15, -16) A. y = -5x +19 B. y = 1/5x + 91/5 C. y = 1/5 x - 19 D. y = 5x - 19 I do know that to be parallel the slopes ...
*April 11, 2012*

**Algebra I**

Please show me how to solve: The value of a $20,000 car decreases every year, t. The equation below models this situation: 20000(1-0.04t)=13,000. After how many years will the car be worth $13,000. Round to the nearest tenth if necessary.
*April 11, 2012*

**math**

well this is no help at all so take this website down now
*April 11, 2012*

**geometry**

Find the geometric mean each pair of numbers. If nessary, give the answer in simplest radical form. 5 and 8
*April 9, 2012*

**math**

Thanks, Steve. You are always so helpful.
*April 5, 2012*

**math**

Which of the following below shows the expression below in simplest form? 2y^2 - 50/y - 5 Is it "C" A. 2(y-5) B. 2(x +50) C. 2(y+5) D. 2(y^2 +5)
*April 5, 2012*

**Finance**

Rent was $350 for 17 years. Based on 4% inflation, how much would the rent be at year 17?
*April 3, 2012*

**English**

it must be "D."
*March 30, 2012*

**English**

In which sentence is ceased used inappropriately and why: A. After the rain ceased, the sun came out. B. When the teacher told us to be quiet, we ceased talking. C. When we were full, we ceased eating. D. When it got cold, we ceased wearing our jackets. Is it "A?" If...
*March 30, 2012*

**Chemistry**

How much energy is needed to convert 90g of water (ice) at -85 degrees C to water (liquid) at 48 degree C?
*March 28, 2012*

**Stats**

In the library on a university campus, there is a sign in the elevator that indicates a limit of 16 persons. Further more, there is a weight limit of 2500 pounds. Assume the average weight of students, faculty and staff on campus is 150 pounds, the standard devaiton is 27 ...
*March 26, 2012*

**chemistry**

Yes the AAS is atomic absorption spectrophotometry. Also thank you for your explanation.
*March 26, 2012*

**chemistry**

Student A ran all her standards through the AAS at a specified C2H2/air flow rate. Just before she was to run her Cu sample, Student B turned down the flow rae of C2H2, thus lowering the flame temperature. Would students' A results of Cu in their sample be high, low or ...
*March 26, 2012*

**biology**

please help
*March 25, 2012*

**biology**

a class of pupils obtained results on a bar chart during a seashore investigation. they sampled the numbers of different seaweeds found in 0.25 m2 from the top shore (upper shore) to lower shore and found average percentage cover for each seaweed. describe how the pupils would...
*March 25, 2012*

**math**

Simplify the radical expression by rationalizing the denominator: 2(square root)108 / (square root) 180y Please show me how to set up and how to solve
*March 21, 2012*

**math**

Simplify th radical expression by rationalizing the denominator: 2(square root)108 / (square root) 180y Please show me how to set up and how to solve.
*March 21, 2012*

**math**

I loved the way you broke it down and explained it to me in detail. What a great help!
*March 21, 2012*

**math**

Please explain how to set this up and how to solve: A school's rectangular athletic fields currently have a length of 125 yd and a width of 75 yd. the school plans to expand both the length and the width of the fields by x yards. What polynomial is standard form represents...
*March 21, 2012*

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