Friday

November 27, 2015
Total # Posts: 266

**Pre Calculus HELP!?**

The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of hours of daylight t days into the year: f(t)= 10+2.8sin(2pi/365)*(t-1.35). How many hours of daylight are there on the 100th day of the year? Round the ...
*November 26, 2015*

**Pre-Calculus HELP!!**

The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of hours of daylight t days into the year: f(x)=11+2.2sin(2pi/365)t-1.25).How many hours of daylight are there on the twelfth day of the year? Round the ...
*November 26, 2015*

**Pre-Calculus HELP!**

Thank you!
*November 25, 2015*

**Pre-Calculus HELP!**

Explain how the transformations of the functions f(x)=15sin(x) and f(x)=sin(x)+15 differ. I see that f(x)=sin(x)+15 experiences a vertical shift, but I am not sure about the transformation that f(x)=15sin(x) experiences. Thank you for your help!
*November 25, 2015*

**English**

The answer to Question #6 should read: There are many bears here. They can smell well, so please put all your food in the bear box. Question #8: It is for keeping travelers' food safe. Question #9: Tomorrow they're going to go fishing. Question #11: They went to Mirror...
*November 25, 2015*

**World History**

I'm trying to find helpful websites that help in answering these specific questions under each main topic. I'm not finding any appropriate sources.
*November 20, 2015*

**World History**

1.) INDUSTRIAL REVOLUTION: Why is there such a massive gap in the world today between rich and poor nations? 2.) IMPERIALISM: How does imperialism continue to affect the world we live in? 3.) WORLD WAR I: How did World War I and new scientific advances affect Western culture? ...
*November 20, 2015*

**Precalculus**

1.) Use sigma notation to describe the sum of the first ten terms of the arithmetic sequence. 20+18.5+17+15.5+14+12.5+11+9.5+8+6.5 2.)Use sigma notation to describe the sum of the first ten terms of the geometric sequence. (40)+(-10)+(5/2)+(-5/8)+(5/32)+(-5/126)+(5/512)+(-5/...
*November 14, 2015*

**Language Arts**

From an hour with Abuelo: which paragraphs represent the exposition in Abuelo's story? paragraphs 8–10 paragraphs 10–12 paragraphs 12–14 paragraphs 14–15 *** (i chose number 4)14-15
*November 13, 2015*

**Precalculus**

I have two questions: 1. You want to make an investment in a continuously compounding account earning 18% interest. How many years will it take for your investment to double in value? Round the logarithm value to the nearest thousandth. Round the answer to the nearest year. 2...
*November 1, 2015*

**Precalculus**

You want to make an investment in a continuously compounding account over a period of two years. What interest rate is required for your investment to double in that time period? Round the logarithm value and the answer to the nearest tenth.
*November 1, 2015*

**Health class**

---- are nutrients that are needed for growth and repair of the body's tissues. Carbohydrates Fats Fibers Proteins
*October 9, 2015*

**Heath class**

Which of the following foods is usually highest in protein? Apple Chicken Bread Candy bar
*October 9, 2015*

**physics**

Thank you so much Damon!
*October 4, 2015*

**physics**

I need help understanding these, please. Thanks! 1. A 2 kg body moves with constant velocity when a force of 10 N is applied. What is the coefficient of kinetic friction between the table and the body? (Would I use F=m*g for this??) 2. Which of the following statements is ...
*October 4, 2015*

**Algebra 1**

The manager of a band recommends that the band sell its CDs for $8.75. The band decides to sell the CD for p dollars. A) Write an absolute value expression that tells how far the bands price is from the recommended price. B) The band wants the price of its CD to be no more ...
*October 4, 2015*

**Health, Safety, and Nutrition**

Which if the following is a mandatory standard? (1 point) 1) Food Labels 2) National Health and Safety Standard 3) dietary reference 4) Childmand adult care food program *Havng a hard time finding it in the book
*September 30, 2015*

**Calculus**

The Norman window illustrated below has a semicircular section on top of a rectangle. The radius of the semicircle is x. The long side of the rectangle is three times the radius of the semicircle. a)Express the total area of the window, A, as a function of x. b) Express the ...
*September 25, 2015*

**P6 maths**

Thank you so much
*September 19, 2015*

**P6 maths **

Mrs Raja and Mrs lee have some eggs to sell. If mrs raja sells 30 eggs per day and mrs lee sells 15 eggs per day , mrs lee will still have 610 eggs left when mrs raja has sold all her eggs . If mrs lee sells 30 eggs per day and mrs raja sells 10 eggs per day , mrs lee will ...
*September 19, 2015*

**Pre-calculus- URGENT**

Convert the rectangular coordinate (-8,i (square root of 3) into polar coordinates. How do I do this?? I tried every way I knew of to convert the y coordinate (i (square root of three)) to polar form, but it didn't work. I think that the polar form of the x coordinate is ...
*September 13, 2015*

**College Algebra**

1. The answer would be m=11. To find this answer, you need to multiply each side of the equation by the LCM (in this case it would be (m+2)(m-3). After doing this, the denominators of both sides will be rationalized, and you will be able to solve for m. Hope this helps! :)
*September 13, 2015*

**Pre-calculus**

write the complex number -5 in polar form. I don't get how to do this because arctan of b/a would be 5/0 which is a fraction with no solution. Also, is a zero? Sorry if I'm being confusing! Thank you!
*September 12, 2015*

**AP English**

Analyze the validity of the following argument: Sally argues, "Mom, your rules are way too strict! Melissa's mother lets her stay out until 2:00 AM on weekends. Peter's parents let him go to all-night raves even on school nights. Tom's parents don't even ...
*September 10, 2015*

**Precalculus**

#1.) Write (1-i)^10 in a+bi form. #2.) Write (1+i)^20 in a+bi form. How do I do these? Thanks!
*September 7, 2015*

**Pre-Calculus HELP!**

change the polar equation r=5/1+cos(theta) to rectangular form. How do I do this? Thank you! :)
*September 6, 2015*

**Physics-PLEASE HELP**

Btw the answers I gave above are positive values, not negative values. Sorry for any confusion.
*August 20, 2015*

**Physics-PLEASE HELP**

A man walks for 5 km/hr for 1 km and 7 km/hr for next 1 km. What is his average speed for the walk of 2 km? -5.8 km/hr -6.0 km/hr -2.0 km/hr -1.0 km/hr Thank you very much!!
*August 20, 2015*

**french**

And i also want to ask you.. what is the proper translation of "Do not run" would it be Ne courez pas or ne pas courir. i think it is ne pas courir
*July 22, 2015*

**french**

1. When he states at the end of the play before he dies "My panache" 2. When Cyrano picks up the panache of de guiche at battle and im not sure of a third one..
*July 21, 2015*

**french**

There is no identity crisis And thats fine
*July 21, 2015*

**french**

Three ways Cyrano in the play Cyrano de Bergerac show his panache?
*July 21, 2015*

**french**

My question is my opinion on what? about the panache de cyrano?
*July 21, 2015*

**Math Calc**

A factory produces bicycles at a rate of 100+0.4t2−0.7t bicycles per week (t in weeks). How many bicycles were produced from day 15 to 28? Hint: the lower limit of integration should be the integer number of weeks preceding day 15, i.e. a=2, and the final answer should ...
*April 28, 2015*

**writing skills**

2. Because information listed on a website can change from day to day, _______ must be included in the end citation on the Works Cited page.A. the title of the siteB. the publication dateC. the date of accessD. the URLStudent Answer: B&...
*April 1, 2015*

**english**

Did you hear the good news? No, I haven't. I got a promotion at my hob Did you really? well congratulations Im so happy for you Really? yes, good for you do you think so? yes you really deserved this thank you
*March 27, 2015*

**Math**

9*3.14*1.2=33.912
*March 26, 2015*

**Astronomy **

Imagine that the asteroid A that has an escape velocity of 50m/s. If asteroid B has twice the mass and twice the radius it would have an escape velocity _______ the escape velocity of asteroid A
*March 26, 2015*

**Chemistry**

If 22 mol of benzene are completely reacted with molecular oxygen, how many moles of carbon dioxide will be produced?
*February 10, 2015*

**college chemistry **

calculate the average kinetic energies of CH4 and N2 molecules at 273k and 546k
*January 20, 2015*

**Math**

Points P and Q are tries toom points on segment AB. If AQ =7x+6 and PQ= 3x+5, find all possible values for the length of AB. So far I've established that 4x+1 is the length of AP and QB So the total length of AB should be 11x+7 I think, I'm not sure how to solve and ...
*January 8, 2015*

**CHEMISTRY-URGENT**

Thank you very much!!
*January 6, 2015*

**CHEMISTRY-URGENT**

A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this compound?
*January 6, 2015*

**physics**

There are 4 significant figures.
*December 5, 2014*

**chemistry-URGENT**

how many moles of atoms are contained in 7.654 x 10^32 atoms of Ga ? Thank you!
*December 2, 2014*

**Chemistry**

How many moles of atoms are contained in 5.60 grams of Sulfur? Can someone help me understand how to work out other problems like these as well? Thank you!!
*December 2, 2014*

**Math **

Larry and Gary are discussing whose garden has the most area to plant flowers. Larry claims that all they have to do is walk around the two gardens to get the perimeter and the one with the greatest perimeter has the greatest area. How would you help these students?
*October 14, 2014*

**3 grade math**

How can I find the area of an angle?" How do you respond?
*October 14, 2014*

**physics**

Jordan throws a golfball straight up from the top of a building 50 meters high. The initial speed of the golfball is 20 m/s and it just misses the edge of the roof when it eventually falls. Neglecting air resistance, find the velocity of the golfball just at the instant it ...
*October 12, 2014*

**Chemistry URGENT!!**

Which anions have the largest and smallest radii? Thank you!!
*October 10, 2014*

**Chemistry**

Which positive ion (cation) has the smallest radius? Please help! Thanks!
*October 10, 2014*

**Math**

For how many values of n where n is a positive integer less than 10 is n+1/2 an integer? A) None B) One C) Three D) Four E) Five Please I would like some help explaining how to get the answer :)
*September 24, 2014*

**CHEMISTRY**

Hi! I know I asked this before, but I still don't understand how to solve the problem:"Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit factoring, calculate how may hydrogen atoms you'd have ...
*September 18, 2014*

**math**

54 seconds
*September 18, 2014*

**Chemistry**

could you clarify what you mean by this answer? I was confused. Thank you! :)
*September 18, 2014*

**Chemistry**

Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit factoring, calculate how may hydrogen atoms you'd have if you had 5.6 g of hydrogen. Thank you!
*September 18, 2014*

**english**

You should either put a period after the word purchase and make two separate sentences, or you should make the statement read, "While at home, I regretted the expensive purchase, so I vowed to return one of the sweaters." Hope this helps! :)
*September 18, 2014*

**math**

You would pay one dollar in sales tax. You can find this out by multiplying 16 times 1/16, thus finding 1/16 OF 16 dollars.
*September 18, 2014*

**Chemistry**

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal lose? Please ...
*September 13, 2014*

**Chemistry**

Thank you so much!!
*September 13, 2014*

**Grammar: PLEASE HELP**

What's the difference among a simple sentence, complex, compound, and compound-complex. I always have a difficult time knowing which is which, except simple sentence of course, that one is easy
*May 7, 2014*

**chemistry**

Can CoBr2+ NH4Br + NH4OH ---> Co^2+ (aq) + 2NH3 (l) + H^+ (aq) + H2O (l) + 3Br^- form the complex [Co(NH3)5Br]Br2 if so please explain
*May 4, 2014*

**CORE MATHS**

The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ascending powers of x., are 2 and 90x^2 Given that a is less than b find the values of the constants a and b . (11 marks) Thanks :)
*March 20, 2014*

**English**

Hello, what is a common theme between the Shakespeare's Romeo and Juliet, To Kill a Mockingbird, and Roahl Dahl's Lamb to the Slaughter? Please give examples of the the theme found within in the 3 books. It's just that I have to write a formal literary essay ...
*December 10, 2013*

**chemistry**

Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy
*December 6, 2013*

**chemistry**

Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy
*December 6, 2013*

**chemistry**

Hello ellie again. I am still having trouble understanding bombardment. The question I'm working on says Complete the bombardment reaction ? + 40-18Ar → 43-19K + 1-1H
*December 5, 2013*

**chemistry**

Hello this is ellie again. I was wondering could you explain what a bombardment reaction is and and show an example of it? Thanks
*December 5, 2013*

**chemistry**

I am having trouble understanding what the concept is for writing these out. Write a balanced nuclear equation for the alpha decay of each of the following radioactive isotopes: curium-243, 22589Ac
*December 5, 2013*

**chemistry**

hello this is ellie again. I need help on this one problem A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 ...
*December 3, 2013*

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(lIf 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?)
*December 3, 2013*

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?
*December 3, 2013*

**chemistry**

A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution?
*December 3, 2013*

**chemistry**

I have a balance equation but i need to know how to find the different states of each element. How do I do that? Ca + 2 HNO3 => Ca(NO3)2 + H2
*December 2, 2013*

**math/ algebra 1**

ok thank you :D
*November 10, 2013*

**math/ algebra 1**

right
*November 10, 2013*

**math/ algebra 1**

x>15
*November 10, 2013*

**math/ algebra 1**

can someone please help me explain how they got this answer and can someone please show me the steps into solving this question? Q: Four more than the quotient of a number and three is at least nine.
*November 10, 2013*

**chemistry**

hello i am having trouble writing these two ionic equations. could someone explain to me how to do that? 1.)K2SO4(aq) and Na2CO3(aq).Write the ionic equation. 2.)RbCl(aq) and KOH(aq).Write the ionic equation.
*November 4, 2013*

**chemistry**

When I solved the equation I got 3.1 grams of NO2. That isn't the correct answer. What did I do wrong?
*October 26, 2013*

**chemistry**

In the formation of smog, nitrogen and oxygen gas react to form nitrogen dioxide: N2(g)+2O2(g)→2NO2(g)How many grams of NO2 will be produced when 2.1L of nitrogen at 840mmHg and 28∘C are completely reacted? I know that you use the equation n=PV/RT to get the number...
*October 26, 2013*

**Chemistry**

How are we suppose to solve for the molar mass because we don't have the chemical formula for the gas?
*October 24, 2013*

**chemistry**

thanks for your help
*October 24, 2013*

**chemistry**

When I've done the equation I've gotten 713.971 K for the first part. What have I done wrong?
*October 24, 2013*

**chemistry**

A 0.286g sample of carbon dioxide, CO2, has a volume of 585mL and a pressure of 495mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas?
*October 24, 2013*

**Science**

I need help with this...
*October 15, 2013*

**Math**

The temperature at 6,000 m altitude is 11 degrees Celsius. At 4,000 m, the temperature is at 2 degrees Celsius. How much colder is it at 6,000 m than at 4,000 m? What is the difference in temperature?
*September 12, 2013*

**science**

An insect inside a bus flies from the back toward the front at 2 m/a. The bus is moving in a straight line at 2m/a. What is the speed of the insect?
*September 7, 2013*

**maths**

the equation for the motion of an object with constant acceleration is d=vt+0.5at^2where d is the distance travelled in ft, v is the starting velocity in ft/s a is the acceleration in ft/s^2 and t is time in seconds a race car begins with a velocity of 200ft/s and accelerates ...
*August 16, 2013*

**human services**

• Can we have client advocacy, a forum for conflict resolution, and agents for policy change without competing for limited dollars and resources? Why? What do you see as the most vital function?
*August 7, 2013*

**math**

Thank you!!!
*May 12, 2013*

**math**

a fair coin is tossed in the air 4 times. if the coin lands heads up the first three tosses, what is the probability the coin will land heads up the fourth toss? I think it is 1/2 because the coin has 2 sides and 50% it will land on heads. My friend thinks it is 1/16, since ...
*May 12, 2013*

**math**

Which two rectangles have an area of 72 square centimeters? A. length 12 cm, width 6 cm B. length 20 cm, width 16 cm C. length 9 cm, width 8 cm D. length 8 cm, width 7 cm
*May 7, 2013*

**Physics**

((.2)^2)/(4(pi^2))=.0010132118 .0010132118x9.8 0.00992948m
*April 7, 2013*

**math**

ok thank you for explaining that.
*March 29, 2013*

**math**

Tina solved for the decimal value 0f (3/5*18) and got an answer of 5.4. Four of her classmates argued that her answer was not reasonable. Which of the following statements best explain why that value can not =5.4 A. the number 18 is a multiple of 3 , so the answer must be a ...
*March 29, 2013*

**math**

Thank you, I wasn't thinking the distance, I was thinking the actual numbers of -4 and 5, you helped me see how this is done. Thanks a lot
*March 29, 2013*

**math**

a number line below -5 -4 -3 -2 -1 0 1 2 3 4 5 Which of the expressions below represent the distance between -4 and 5 on the number line? [ ]= absolute value symbol A. [-4+5] B.[4-5] C.[-4-5] d.[-5-(-4)] I believe it is D, since the absolute value of a neg. number is positive...
*March 29, 2013*

**math- please help**

Thank you so much for your help.
*March 28, 2013*

**math- please help**

How do you figure this out? I don't know how to do it? Can you please explain how you would get b? Did you just divide each side by m? Thank you for your help
*March 28, 2013*