Wednesday

September 17, 2014

September 17, 2014

Total # Posts: 1,316

**science**

You are wrong hgj.
*April 11, 2013*

**Math**

An ordered triple of real numbers (a,b,c) is called friendly, if each number is equal to the product of the other 2. How many friendly triples are there? Details and assumptions The numbers need not be equal to each other. The numbers need not to be pairwise distinct (which ...
*April 10, 2013*

**Math (Number Theory )**

An ordered triple of real numbers (a,b,c) is called friendly, if each number is equal to the product of the other 2. How many friendly triples are there? Details and assumptions The numbers need not be equal to each other. The numbers need not to be pairwise distinct (which ...
*April 10, 2013*

**applied calculus**

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit differentiation. (Use questions 1 ...
*April 9, 2013*

**applied calculus**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*April 9, 2013*

**applied calculus**

1. Consider the function y = xx (for x> 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of logarithms and implicit ...
*April 9, 2013*

**Applied calculas**

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit differentiation. (Use questions 1 ...
*April 8, 2013*

**Applied calculas**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*April 8, 2013*

**Applied calculas**

1. Consider the function y = xx (for x > 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of logarithms and implicit ...
*April 8, 2013*

**Statistics**

Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability . Compute the probability that occurs or does not occur (or both). Compute the probability that either occurs without occurring or and both occur.
*April 8, 2013*

**math**

I think there's an easier way to do this, 7^6/7^7 would be equals to 7^-1. According to the Law of Exponents powers with a same base number in division is simply subtracted.
*April 1, 2013*

**Spanish**

I tried on 8 but i didn't get 9. I do not know how to do these, so please help. Thank You. 8. Which of these sentences is correct? Juego baloncesto. Juego a la baloncesto. *Juego al baloncesto. 9. Which of these sentences is correct? Juego al golf. Juego golf. Juego a la ...
*March 28, 2013*

**spanish**

Thank You. Will you please answer the last one I just posted?
*March 28, 2013*

**spanish**

15. If you do an activity every day, which expression would you use to express that? siempre *todos los días nunca muchas veces a veces 16. If you do an activity always, which expression would you use to express that? *siempre nunca todos los días muchas veces a ...
*March 28, 2013*

**Spanish**

Thank You. Will you pleasse answer the last one I posted?
*March 28, 2013*

**Spanish**

5. Fill in the blank with the correct form of the verb jugar. yo __________ My Answer: yo juego 6. Fill in the blank with the correct form of the verb jugar. nosotros __________ My Answer: nosotros jugamos 7. Fill in the blank with the correct form of the verb jugar. ellos ...
*March 28, 2013*

**math**

1340 UNFAVORABLE
*March 28, 2013*

**Chemistry**

#7 -D #8 -B...is that better?
*March 28, 2013*

**Chemistry**

you are right I think #3 is B...#4 is A and #5 is A...haven't done 7 and 8 yet...how am I doing?
*March 28, 2013*

**Chemistry**

1. Which of the following metals is oxidized by calcium ions? *potassium zinc iron lead 2. The first electrochemical cell was invented by ____. Michael Faraday *Alessandro Volta James Maxwell Benjamin Franklin 3. Why can't a lead storage battery be recharged indefinitely...
*March 28, 2013*

**Chemistry**

1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...
*March 27, 2013*

**Englisj**

ok. Thank you.
*March 27, 2013*

**Englisj**

1. Which of the following is NOT an example of persuasive writing? a position paper from an elected official a college admissions essay a movie review *a summary of a textbook reading assessment 2. Identify the following as a fact or an opinion: “Video games are too ...
*March 27, 2013*

**Chemistry**

did you see that jose?
*March 27, 2013*

**Chemistry**

I think I found out that it is A.
*March 27, 2013*

**Algebra**

What is the sum of all integer values of n satisfying 1 \leq n \leq 100, such that n^2 - 1 is a product of exactly two distinct prime numbers?
*March 26, 2013*

**Physics/math**

Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of the other ...
*March 25, 2013*

**Physics/math**

Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of the other ...
*March 25, 2013*

**Chemistry: check answers**

I'm really trying to figure this out. Is it D for number 2 and B for number 3? I know you already explained it once and if i'm wrong, any additional help would be greatly appreciated.
*March 22, 2013*

**Chemistry: check answers**

2. B 3. C
*March 22, 2013*

**Chemistry: check answers**

Please check. Thank you. 2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O72– B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are ...
*March 22, 2013*

**Chemistry**

2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the ...
*March 22, 2013*

**chemistry**

2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the ...
*March 22, 2013*

**Physics**

A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm×2cm×3cm . A voltage V is applied between all opposite faces of the block and the corresponding currents were recorded. What is the maximum ...
*March 22, 2013*

**Physics**

The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2? Details and assumptions You may assume the...
*March 22, 2013*

**Spanish**

10. Fill in the blank with the correct form of the verb: ellos/salir. Ellos ______ Is it: Ellos salen or Is it: Ellos salieron Thank You.
*March 21, 2013*

**Spanish: Check my answer**

10. Fill in the blank with the correct form of the verb: ellos/salir. Ellos ______ Is it: Ellos salen or Is it: Ellos salieron Thank You.
*March 21, 2013*

**Spanish: Translate please**

Translate these please: una zanahoria una manzana una uva una fresa una zanahoria una manzana unas uvas una fresa una manzana la lechuga una papa una cebolla el refresco el jugo la leche el té Thank You.
*March 21, 2013*

**Algebra-Knights**

I went to the website....maybe I am doing something wrong but it won't bring up the graph - I put in the equation on y1
*March 21, 2013*

**Algebra**

Thanks
*March 21, 2013*

**Algebra**

it shows y= and then the square root goes over all of 2x+6
*March 21, 2013*

**Algebra**

Which graph matches the function: y= square root 2x + 6 How would this look on a graph? Thank You.
*March 21, 2013*

**Algebra: Please help**

Thank you for all your help...I appreciate it.
*March 21, 2013*

**Algebra: Please help**

So which is it?
*March 21, 2013*

**Algebra: Please help**

Solve for B: square root b^4/25 = 4. A.) 2 B.) +/- 5 square root 2 C.) 3 D.) +/- 2 square root 5 I don't know how to do these so please show your work. Thank you.
*March 21, 2013*

**Algebra: check my answer**

A right triangle’s legs are 3 and 4 meters long. What is the measure of the angle adjacent to the 4-meter leg to the nearest tenth of a degree? A.) 35.9° B.) 36° *C.) 36.9° d.) 37.5° Thank You.
*March 21, 2013*

**Algebra**

solve for x: square root 2x+3 = square root 6x - 1. A.) 1 B.) 2 C.) 3 D.) square root 6 I don't know how to do these so will you please show your work. Thsnk You.
*March 21, 2013*

**chem**

pls help
*March 20, 2013*

**chem**

For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. (a) As in AsO43- number: arrangement: linear bent trigonal planar square planar tetrahedral (b) Se in SeO42- number: arrangement: linear ...
*March 20, 2013*

**English**

Thnak you.
*March 20, 2013*

**English**

choose from For example or therefore 1. Most listeners don't simply absord your message of thier own called feedback._______, when you phone a friend to say you'll be late, you may hear,"Hey, you really need to get here on time!" That is feedback. I am a bit ...
*March 20, 2013*

**chem**

could u check if im right: a. As in AsO43- for number its 3 arrangement is tetrahedral b. Se in SeO42- # is 2 arrangement is tetrahedral c. S in H2S # is 1 arrangement is linear
*March 19, 2013*

**chem**

For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. (a) As in AsO43- number: arrangement: linear bent trigonal planar square planar tetrahedral (b) Se in SeO42- number: arrangement: linear ...
*March 19, 2013*

**Algebra**

Please help me. Please show work. What are the domain and range of the function y=2 square root 3x + 4-5? *A.) X >/= -4/3; Y >/=-5 B.) X >/= 4/3; Y >/= 5 C.) X </= -4/3; Y </= -5 D.) X </= 4/3; Y </= 5 Thank You so much.
*March 19, 2013*

**english**

Thank You.
*March 19, 2013*

**english**

1. Which of the style guides is most focused on professionals who are writing articles for publication? A.) MLA B.) APA *C.)Chicago Thanks.
*March 19, 2013*

**chemistry**

Calculate the concentrations of all species in a 0.690 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8.
*March 15, 2013*

**math**

thank you mary
*March 7, 2013*

**math**

a square kitchen floor can be exactly covered withe square tiles that are either 9 inches or 15 inches on a side. what is the minimym area in square feet that the kitchen can have? how many of each size tile would be needed to cover the minimum size floor?
*March 7, 2013*

**Geometry**

A six foot person is walking away from an 18 foot pole. Express the distance between the pole and the person in terms of the length of the persons shadow.
*March 5, 2013*

**math**

A manager of an electronics store takes a random sample of large shipments of circuit boards to determine if he will accept the delivery. he randomly samples 20 boards from a shipment and will reject the delivery if more than 1 circuit board is defective. if the manufacturer ...
*March 5, 2013*

**Chemistry**

Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of solids Please help - I...
*March 4, 2013*

**Chemistry**

1. Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of solids Please help...
*March 4, 2013*

**finance**

if you want to have $7000 in 10 years, how much money must you put in a savings account today? Assume the account pays 4% compounded daily.
*March 3, 2013*

**Algebra 1**

And please can you show me all your work.
*February 28, 2013*

**Algebra 1**

A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder is one foot more than twice the distance from the wall. Find the distance from the wall to the bottom of the ladder. (Hint: Use the Pythagorean ...
*February 28, 2013*

**physics**

F is 208.42N normal is 125.14 N
*February 27, 2013*

**Spanish: Please Help**

23. Write the correct verb form in the blank: yo/encontrar. yo ___________ (2 points) 24. Write the correct verb form in the blank: ella/cerrar. ella ___________ (2 points) 25. Write the correct verb form in the blank: nosotros/querer. nosotros ___________ (2 points) 26. Write...
*February 27, 2013*

**Spanish: Please Help**

I don't know how to do these or I would have given answers or at least a good guess. Thanks.
*February 27, 2013*

**Spanish: Please Help**

23. Write the correct verb form in the blank: yo/encontrar. yo ___________ (2 points) 24. Write the correct verb form in the blank: ella/cerrar. ella ___________ (2 points) 25. Write the correct verb form in the blank: nosotros/querer. nosotros ___________ (2 points) 26. Write...
*February 27, 2013*

**Spanish: Please Help (CHECK ANSWERS)**

19. Your hermano mayor is A.) younger than you. B.) older than you. *C.) more powerful than you. D.) smarter than you. 20. Your hermana menor is *A.) younger than you. B.) older than you. C.) more powerful than you. D.) smarter than you. Thank You
*February 27, 2013*

**Spanish: Please Help**

Thank You. What do the numbered ones say?
*February 27, 2013*

**Spanish: Please Help**

I have no idea what the answers are to these. Thank You For questions 10-14, match the family members: A. el hijo de mis tíos B. la hija de mis padre C. la madre de mi padre D. la hermana de mi padre E. la esposa de mi padre 10. mi madre 11. mi tía 12. mi abuela ...
*February 27, 2013*

**Spanish please translate from spanish to english**

1.) ¿Cuál es la prima mayor? 2.) ¿Cuál es la prima menor? 3.) Es el doce de mayo. Es el 20 de agosto. Es el primero de diciembre. Es el uno de diciembre. 4.) Tiene doce años. Tienes doce años. Tengo doce años. Thank You so much
*February 8, 2013*

**Please translate from spanish to english**

Thank You
*February 8, 2013*

**Please translate from spanish to english**

La familia Gutierrez tiene dos hijos. Ramón tiene 15 años. Es el hijo mayor. Su cumpleaños es el veinte de agosto. Rogelio tiene 13 años. Es el hijo menor. El cumpleaños de Rogelio es el 1 de diciembre. Ramón y Rogelio tienen dos ...
*February 8, 2013*

**Spanish**

are my answers correct then or are you saying #4 is wrong?
*February 7, 2013*

**Spanish**

Thank You
*February 7, 2013*

**Math help**

They each brought 7 pets. hope this helps
*January 29, 2013*

**Maths**

A bouncy ball bounces 16m on its first bounce and then 8m on the second bounce. Each time it bounces the height halves. How high will the ball bounce on the 10th bounce?
*January 29, 2013*

**Calculus**

lim 1/(1+h)^2-1/h h->0 I have 1 as my final answer and was wondering if i was correct
*January 28, 2013*

**Calculus**

lim e^(1+h)-e/h h->0
*January 28, 2013*

**science**

The XYZ Company makes widgets and sells to a market that is just about to expand after a period of stability. As the year starts, the widgets are manufactured at a cost of $0.75 and sold at a market price of $1.00. In addition, the firm has 1,000 widgets in finished goods ...
*January 27, 2013*

**chemistry**

I got a very close answer, I just needed help with the steps, so thank you my friend.
*January 22, 2013*

**chemistry**

How much ice is required to cool a 15.0oz drink from 71 F to 34 F, if the heat capacity of the drink is 4.18 J/g*C ? (Assume that the heat transfer is 100% efficient.)
*January 22, 2013*

**Science**

Please compare and contrast the electrochemical events involved in the initiation and propagation of an action potential with the electrochemical events involved with the initiation of muscle contraction in skeletal muscle. Be sure to describe the electrochemical changes in ...
*January 21, 2013*

**Calculus 2**

A circular plate of radius r feet is submerged vertically in a tank of fluid that weighs w pounds per cubic foot. The center of the circle is k(k>r)feet below the surface of the fluid. Show that the fluid force on the surface of the plate is F=wk(πr^2). How to prove ...
*January 18, 2013*

**coordinate algebra**

Jon is flying an airplane.He is currently 3,5000 feet in the air and he is ascending at a rate of 500 feet per minute.How many minutes it will take him to reach a height of 9,000 feet
*January 14, 2013*

**coordinate algebra**

Jon is flying an airplane.He is currently 3,5000 feet in the air and he is ascending at a rate of 500 feet per minute.How many minutes it will take him to reach a height of 9,000 feet
*January 14, 2013*

**Math**

I am stuck on several probability questions. A spinner that has 15 equal sized sections numbered 1 to 15 is spun twice. What is the probability the spinner lands on an odd number and then on an even number? A. 56/225 B. 169/225 C. 1/15 D. 21/225 I chose A. 56/225 because 8/15 ...
*January 11, 2013*

**chemistry**

If 1.00 mole of BrCl is introduced into a 500.0 ml flask, what are the concentrations of Br2, Cl2 and BrCl at equailbrium
*January 9, 2013*

**business analytics**

waiting times for 64 randomly selected walk-in customers and determined that their mean waiting time was 15 minutes. Assume that the population standard deviation is 4 minutes. The 90% confidence interval for the population mean of waiting times is
*December 27, 2012*

**geometry**

prove KLM=KNM.give reasons
*December 13, 2012*

**statistics**

A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content...
*December 11, 2012*

**statistics**

A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content...
*December 11, 2012*

**Chemistry**

Never mind! I got it! :)
*November 30, 2012*

**Chemistry**

Lead(II) oxide from an ore can be reduced to elemental lead by heating in a furnace with carbon. PbO(s) + C(s)= Pb(l) + CO(g) Calculate the expected yield of lead if 90.0 kg of lead oxide is heated with 90.0 kg of carbon.
*November 30, 2012*

**Chemistry**

An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the controlled reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g)= CN2H4O(s) + H2O(l) What is the theoretical yield of urea when 100. g of ammonia is...
*November 30, 2012*

**Chemistry**

It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this represent in cm3? (R = 0.0821 L atm / K / mol)
*November 26, 2012*

**Maths - HELP PLZ**

HOW CAN I SOLVE THE INEQUALITY GRAPHICALLY 3X^2 + 10X - 8 > 0 Any help would be appreciated
*November 21, 2012*

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