Thursday
September 18, 2014

Posts by jane


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

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | Next>>

Search
Members