# Posts by celina

Total # Posts: 149

**Maths**

What is minimum value of e^2x+ e^-2x Thx

*November 7, 2015*

**Economics**

At the present price of $20 per unit, the firm is selling 2000 units of a good. It believes that the price elasticity of demand for the good is - 1.0. If the price is lowered to $18, then the buyers would be expected to buy a) 1800 units b) 2000units c) 2200 units d) 2222 ...

*April 30, 2015*

**math**

A 12-foot tree casts a 22-foot shadow. Find the angle of elevation from the tip of the shadow to the top of the tree. Round the answer to the nearest tenth.

*October 7, 2014*

**bussines**

does it take longer to get your mba if you take bcom over bba?

*March 24, 2014*

**business**

prepare an argument opposing the following statement: "The first priority of any business is to its shareholders. It is not environmental protection- that is the role of government" i need some starter points to get me started on this question, thanks

*March 11, 2014*

**english**

what is meant by the terms "grow organically" in this sentence? The fashion company has been willing to build and grow organically.

*December 18, 2013*

**trig**

prove that: sinC+sinD =2sin((C+D)/2)*cos((C-D)/2)

*December 8, 2013*

**international business**

Assume you are a Canadian importer of goods. You purchase $5000 worth of chocolates from Belgium, $6000 worth of soaps from France, $10000 worth of teas from India. Evaluate the Canadian currency over a period of two weeks. Choose three periods to examine the Canadian dollar. ...

*October 4, 2013*

**algebra 1**

there are 60 second in a minute so 8x6=48 that means you can sort 48 in one minute. so if there are 45 minutes..... 45 x48=2160 your answer is 2160

*October 3, 2013*

**Math- important!!!**

Samantha is a baseball player, she has a batting average of 0.280. a) find the probability that at least 3 hits in her next 5 times at bat (12 marks) b)what is Samantha's expected number of hits in her next 10 times at bat? (3 marks)

*July 11, 2013*

**Math**

I got 6 as the answr when I did the check it worked! Thanks for the help tho! :)

*July 10, 2013*

**Math**

A picnic cooler contains different types of cola.12 regular, 8 cherry, 6 diet, 8 caffeine free, 10 diet vanilla, and some diet cherry. U pick a can of cola without looking at its type. There is a 44% chance that the drink selected is diet. How many diet cherry colas r in the ...

*July 10, 2013*

**Math**

Thank you! :) that's what I got,is there any more work to it? Because its an 8 mark question!

*July 10, 2013*

**Math**

Find the probability that a number chosen at random between 1 and 100 is divisible by 2 and 7.

*July 10, 2013*

**Data management gr.12**

Find the probability that a number chosen at random between 1 and 100 is divisible by 2 and 7.

*July 10, 2013*

**Math**

"Find the area of a rhombus with sides of length 10 in. and longer diagonal of length 16 in." and Also, how do you solve the problem "Find the area of a regular decagon with radius 4 cm."

*June 9, 2013*

**Chemistry**

How many mL of .715 M HCI is required to neutralize 1.25grams of sodium carbonate? (Producing carbonic acid)

*March 27, 2013*

**college math**

loverdale-Nurseries obtained a $60,000 loan at 7.5% compounded monthly to build an additional greenhouse. Construct a partial amortization schedule for payments of $1000 per month (except for a smaller final payment)showing details of the first 2 payments. Payments 56 and 57 ...

*November 6, 2012*

**Physics, please help:)**

A charge rod is brought near a pile of tiny plastic sphere. Some of the spheres are attracted to the rod, but as they touch the rod, they are flung into different directions. Explain. Thanks :)

*September 1, 2012*

**Physics**

A charge rod is brought near a pile of tiny plastic sphere. Some of the spheres are attracted to the rod, but as they touch the rod, they are flung into different directions. Explain. Thanks :)

*August 31, 2012*

**business**

what are the tree steps to join a team canadian mission?

*June 26, 2012*

**english**

im not sure of what theme to base the thesis on,thats the part i need help with

*June 6, 2012*

**english**

i neeed help putting my thesis together for my essay reflecting on two books: "the poisonwood bible", and "fall on you knees" plz help asap

*June 6, 2012*

**Maths**

How to find the total surface area of a prism, cone and cylinder?

*May 28, 2012*

**Mathematics**

Thanks!

*May 28, 2012*

**Mathematics**

Twelve man take 6 hours to finish a piece of work. After the 12 men have worked for 1 hour, the contractor decides to call in 8 men so that the work can be completed earlier. How many more hours would 20 men take to complete the remaining work?

*May 28, 2012*

**math**

the arc length and central angle of a circle are 10cm and 80degrees respectivly. what is the length of the radius?

*May 12, 2012*

**Physics**

The parabolic TV antenna receives electromagnetic waves from satellites. What is special about these rays?

*May 9, 2012*

**functions**

a square has an area of 100 cm^2. how much bigger is the square's circumscribed circle than the inscribed circle?

*May 8, 2012*

**Physics**

If you can see the face of a friend who is underwater, can she also see you? Please explain. Thanks :)

*April 8, 2012*

**Physics**

A ray of light enters a glass block from air at an angle of incidence of 50 degrees. The angle of refraction is 30 degrees. What is the refractive index of the glass? What is the value of critical angle for this glass? Thank you :)

*April 7, 2012*

**calculus**

Use the limit process to find the area of the region between the graph of the function f(x)= x^3 and the x-axis on the interval [0,2]

*December 18, 2011*

**calculus**

Write the definite integral for the area of the region bounded by the grpahs of y=9-x^2 and y=0

*December 18, 2011*

**chemistry**

a chemical reaction occuring in a cylinder equipped with a moveable piston produces 0.58 mol of a gaseous product. If the cylinder contained 0.11 mol odf gas before the reaction and had an initial volume of 2.1 L, what was its volume after the reaction

*May 15, 2011*

**chem**

indigo C16H10N2O2 (numbers are suppose to b as a subscript) is the common name of the dye that gives blue jeans their characteristic colour. Calculate the mass of oxygenin 25.0g og indigo. show your work.

*May 1, 2011*

**chemestry grd 11**

A typical soap molecule consists of a polyatomic anion associated with a cation. The polyatomic anion containd hydrogen, carbon & oxygen. One particular soap molecule has 18 carbon atoms. it contains 70.5% carbon, 11.5% hydrogen, and 10.4% oxygen by mass. It also contains one ...

*May 1, 2011*

**chemestry grd 11**

indigo C16H10N2O2 (numbers are suppose to b as a subscript) is the common name of the dye that gives blue jeans their characteristic colour. Calculate the mass of oxygenin 25.0g og indigo. show your work.

*May 1, 2011*

**chemestry**

balance the equations (single displacement) 1. zinc + Iron(II) Chlorine ----> 2. Zinc + Hydrogen Chlorine ---->

*March 23, 2011*

**chemestry**

how is ionizaion energy different from electron affinity? use a chemical equation to clarify your definition.

*March 22, 2011*

**chemestry**

what do the plus signs mean?

*March 22, 2011*

**chemestry**

write a chemical equation for an atom losing a third electron. would the ionization energy for this reaction be larger or smaller that the ionization energy for the lloss of the first or second electron? explain

*March 22, 2011*

**Mathematics .**

But how would you do it using A^2 + B^2 = C^2 ?

*March 9, 2011*

**Mathematics .**

I need some help with this specific question. In a computer catalog, a computer monitor is listed as being 19 inches. This distance is the diagonal distance across the screen. If the screen measures 10 inches in height, what is the actual width of the screen to the nearest ...

*March 9, 2011*

**Advertising-HELP**

I need an advertisement which hasn't been banned yet, but that you think should be banned. I don't really pay attention to ads, so I don't know which ones should be banned. I actually have to write a complaint letter on one. Advertising-HELP - Kate, Monday, ...

*February 21, 2011*

**Advertising-HELP**

Thanks, you mean the KY Intense "Socks" right?

*February 21, 2011*

**Advertising-HELP**

I need an advertisement which hasn't been banned yet, but that you think should be banned. I don't really pay attention to ads, so I don't know which ones should be banned. I actually have to write a complaint letter on one.

*February 21, 2011*

**Advertising**

Is there any advertisment which you think should be banned?

*February 21, 2011*

**Math grd 12**

The number of nuts in a package of Nutty's premium cashews is normally distributed with mean of 432.4 nuts and standard deviation of 5.8 nuts packages with fewer than 420 nuts or more than 445 nuts will be rejected by quality control a) what is the probability that a ...

*January 19, 2011*

**Physics**

Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?

*November 24, 2010*

**Math grd12**

Gisela lives in a subdivision where the streets are laid out in a grid pattern. Her school is eight blocks south and six blocks east of her home. How many different direct routes could she take when she bicycles to school if she always stops by her friend's home, which is ...

*November 21, 2010*

**Math grd 12**

In how many ways can you make Rhe border if it requires 15 titles and you use only blue and white ones? Explain your reasoning. The final answer is 8008.

*November 21, 2010*

**Math grd 12**

You are setting a system programing codes for a universal TV remote control. Each code will have five digits and cannot include a 0 or repeat any digits. How many codes a)do not contain a 7? b)have 3 as the third digit, and 5 as the fifth digit c)begin with an even digit? d)...

*November 21, 2010*

**Math grd12**

How many arrangements of five letters from the word 'certain' contain the letter 't'? Explain your reasoning.

*November 21, 2010*

**Math grd12**

Ohh i accidently added an extra zero...thank you:)

*November 21, 2010*

**Math grd12**

How many ten-digit telephone numbers are possible if the first three digits must be different? The answer is 72,000,000,000.... I need the method to get that:)

*November 21, 2010*

**Math grd 12**

Ok thank you:)

*November 21, 2010*

**Math grd 12**

How many different seven-digit telephone numbers are possible if no number may begin with 0?.....the answer is 9,000,000 but I'm not sure how to get that, plz explain:)

*November 21, 2010*

**Chemistry**

What is the length of a string that has a standing wave with four nodes (including those at the ends) and lambda = 24 {\rm cm}

*May 17, 2010*

**Thanks!**

Thank you so much!

*December 22, 2008*

**algebra**

Is there a link to a site where I can find a way to solve a Soma Cube, and where each shape would go? Thank you!

*December 22, 2008*

**Algebra**

Yes! I see, I didn't really think of it that way until after I posted the message. Thank you!

*December 18, 2008*

**Algebra**

Here's the question I'm having trouble with: Tell how you would identify the intercepts for the graph of the equation: 3x + 6y = 18 I'm not exactly sure how you would find the intercepts from this equation. Thanks!

*December 18, 2008*

**To Everyone at Jiskha**

I agree! Thank you, all of the people that are so helpful! :-)

*December 18, 2008*

**spelling**

Just wondering: is this supposed to be a real story about something that happened to you, or is it a fictional story? If it is supposed to be a real story, then you might want to talk to your teacher and see if there is another topic you can write about. If it is a fictional ...

*December 18, 2008*

**7th grade**

I don't know how you would check, but by using paranpheses around certain parts of what you are typing in, it will make it do it. Hope I helped!

*December 18, 2008*

**Algebra--please help!**

You're being so helpful, thank you! Just wondering, my triangle turned out to be very skinny. It's supposed to be this way, right? And for part d, that is how my teacher typed it, but in the other day's homework he also did a typo. Thank you so much! You were ...

*December 17, 2008*

**Algebra--please help!**

Here are some more questions I'm having trouble with. Please walk me through them so I can fully understand them. #2: Let A be (5,9), B be (-3,-5), and C be (1,1). The median of a triangle connects a vertex of a triangle to the midpoint of the opposite side. *Another note...

*December 17, 2008*

**More algebra--please help!**

Here are some more questions I'm having trouble with. Please walk me through them so I can fully understand them. #2: Let A be (5,9), B be (-3,-5), and C be (1,1). The median of a triangle connects a vertex of a triangle to the midpoint of the opposite side. *Another note...

*December 17, 2008*

**Algebra--please help!**

Thank you so much!

*December 17, 2008*

**Algebra--please help!**

I hate to ask so many questions, but why did you write one, though? Thanks!

*December 17, 2008*

**Algebra--please help!**

Oh, I see... when I got 19/37 when I solved, I thought I was incorrect. One last thing-- why did you write B= 100(1-19/37)=100(18/37)? Why did you take away 1? Thank you!

*December 17, 2008*

**Algebra--please help!**

Thanks for replying so fast! Once you got to "subtract the second equation," I got a little confused. So basically its, 100-81=A(100-63), like you said. Does the B stay put? And what do you mean by "solve for A" and "put A into either equation?" ...

*December 17, 2008*

**Algebra--please help!**

I really need help with my math homework today, because I am totally confused! Please give me the answer, but also walk me through it, too, so I can fully understand it, because just the answer won't really help. #1: A math teacher wants to curve a set of grades. *Just a ...

*December 17, 2008*

**Algebra**

That's funny, because in my packet, it said to "find the domain of C." But I see how that would not make sense. Thanks!

*December 16, 2008*

**Algebra**

Another question: A cell phone company charges $60 for a cell phone and $40 per month under its economy plan. Formulate and graph a model that can be used to determine the total cost, C(t), of operating a cell phone for t months. Find the total cost for 5 and 1/2 months of ...

*December 16, 2008*

**algebra**

Thank you so much!

*December 16, 2008*

**algebra**

I'm a little confused on how to solve this: The number of cricket chirps per minute is given by N(t) = 7.2t - 32 Where t is the temperature in degrees Celsius. a. Graph the equation N(t) = 7.2t - 32 I have learned a few ways to graph equations. One way would be to use -32 ...

*December 16, 2008*

**math work did i do right**

I don't think you posted your questions. Could you try to repost them?

*December 16, 2008*

**math**

I don't exactly get what you are saying, but what I would do is find 19% of $500, and then subtract it from 500. Let's call that answer x. Then you find 3% of your answer, x, and subtract that, and you have your answer. If you did that, or something similiar, then you...

*December 16, 2008*

**Algebra please help!**

Thank you!

*December 10, 2008*

**Algebra please help!**

I kind of get what you're saying... but what is a hypotenuse? Thanks for the help!

*December 10, 2008*

**Correction to what I wrote! Please read this instead!**

Sorry, what I wrote might not have made sense. Here's a re-written version. I'm very confused with what I'm learning about right now. We are kind of talking about slopes, functions, graphs, etc. Today, my teacher taught about midpoint and distance, and did not ...

*December 10, 2008*

**Algebra please help!**

I'm very confused with what I'm learning about right now. We are kind of talking about slopes, functions, graphs, etc. Today, my teacher taught about midpoint and distance, and did not explain very well at all. Would someone please explain to me how to find midpoint ...

*December 10, 2008*

**algebra**

What does collinear mean?

*December 8, 2008*

**spanish**

Does anyone know a good review site to review for my Spanish final that is tomorrow? We have just learned simple things like the numbers, alphabet, colors, days of the week, months, etc. A game or some other way of reviewing would be helpful. Thank you!

*December 7, 2008*

**another algebra question**

Here's another thing I must solve: For each graph of a function, determine these things: a. f(1) b. domain c. any x-values for f(x)=2 d. range I can't put the graphs I need up here, but is anyone able to explain how you would find these things? Thank you so much!

*December 4, 2008*

**Algebra**

Right now we are learning about functions, relations, etc. and I am kind of confused. Here is what I have to answer: Determine whether each of the following is a function. Identify any relations that are not functions. Domain A set of avenues Correspondence An intersecting ...

*December 4, 2008*

**solving inequality**

I remember doing this last year, so I'll try to tell you as much as I can remember. My teacher told us last year to start of thinking of it like an equation. Pretend the greater or less than sign is a equals sign. For #1, add 8 to both sides, like you would with an ...

*December 3, 2008*

**3rd Grade**

Hmmm... it can be anything? I got one: A Super Terrific... and then you can think of anything that starts with a c that you would want to put there, like a cat or a cloak or something. Just try to keep one thinking of funny topics. The A, S, and T could all be adjectives. Or, ...

*December 3, 2008*

**English**

Thank you, Sra. I actually did find the site (ESL Desk), but thank you for the link, anyway! The link you gave me actually has better ones than the one I was thinking of. Thanks for your help!

*December 3, 2008*

**English**

That could possibly work. Thanks! :)

*December 3, 2008*

**English**

Does anyone know a link to a site that has a list of adjectives starting with the different letters of the alphabet? I have used one before, but I forget its name. I need an adjective that starts with "s," to go with sisters who don't get a long. My title will be...

*December 3, 2008*

**Algebra**

Ummm... I did graph them, and why would it be (-5, -3)? That would make the square... slightly diagonal, wouldn't it. I said -4 because that is directly below 4.

*December 2, 2008*

**Algebra**

Here is my question: If (2, -3) and (-5, 4 are the endpoints of a diagonal of a square, what are the coordinates of the other two vertices? I got (2,3) and (-5,-4). But the other question was: What is the area of the square? How would you find this? Do you just count the ...

*December 2, 2008*

**Math**

What you can do is make proportions. Do: 3/50 = 14/x Then, multiply 50 by 14 and divide by 3. So, yes, the answer is 233 and 1/3 Hope I helped!

*December 2, 2008*

**9th grade : Algebra**

Okay, I see. First take 2x away from both sides. That makes: 5y= 10-2x Now, I'm not positive about this part, but I think you would divide the whole side by 5, therefore making: y = 2-.4x or y = -.4x + 2 Hope I helped!

*December 2, 2008*

**9th grade : Algebra**

Do you have to solve for x or y? I have an algebra book... I'll post another response soon.

*December 2, 2008*

**Family Consumer Sciences**

Thanks for your response!

*December 1, 2008*

**Family Consumer Sciences**

Thank you so much! I found just what I needed! :)

*December 1, 2008*

**Family Consumer Sciences**

One of the questions on a worksheet I must answer is this: You're in study hall and trying to get your homework finished. The students next to you continue to talk and interfere with your concentration. What should you do? You are supposed to put your own answer, which I ...

*December 1, 2008*