Posts by Dania

Total # Posts: 27

  1. Chemistry

    You add 7.326g of solid CaCl2 to 45.5 mL of water in a coffee cup calorimeter and measure as the temp. Increase from 22.6 C to 41.5 C. Specific heat water is 4.184 J/ g.C and the density of water is 0.9977 g/mL. Find the mass of water. PLEASE HELP ME!!!
  2. Math

    The lowest common multiple of two numbers is 36, one number is 12, what might the other number be?
  3. Math

    If the perimeter of a parallelogram is 140 m, the distance between a pair of opposite sides is 7 meters and its area is 210 sq m, find the length of two adjacent sides of
  4. Math

    A package of 4 mechanical pencils comes with 2 free erasers.If you get a total of 12 free erasers, how many packages of pencils did you buy?
  5. physics

    An object uniformly accelerates at a rate of 1.20m/s^2 east. While accelerating at this rate, the object is displaced 470.4m east in a time of 28 s. What velocity did this object reach in this time ? I used Vf=Vi+at which will be Vf=(1.20)(28) but i feel this isn't the way...
  6. Math

    9. If f is a linear function such that f(-1) = 5 and f(2) = -1, then f(x + 1) = A. -2x + 1 B. -2x + 3 C. x + 1 D. -2x + 2 E. 2x + 1
  7. Math

    each time you move to the next row you should add 3 to the row before it. 8+11+14+17+20+23+26+29+32+35=215 seats
  8. Math

    An artist had 45 pieces of turquoise and 60 cat's eye marbles.each sculpture she made contained the same number of each kind of stone and more than one of each. What is the greatest number of sculptures she could have made ?
  9. Science

    Please,can anybody answer this question? How osmosis and diffusion explain why cell size is small ?
  10. math 5th

    the answer is the number 0
  11. 4th Grade Math

    you should have 8 in the 10,000 place . your hundred digit is greater than your ten thousands , that means your number in the hundred place must be the ones place you should have 4 since there are 4right angles in a rectangle.your tens must be 5 since 13-8=5.the digit in ...
  12. Calculus AP need help!

    Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function. If f(x)= ∫(4,x^3)√(t^2+10) dt then f '(x).

    i don't get the part sec^2<---why use square?

    1. If f(x)=tan3x, find f'(x) and f'(3). 2. let f(x)=3cos(cosx), find f'(x). i got stuck. i don't know im doing it right way, f'(x)=tan3x*1
  15. college Calculus Help!

    Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x
  16. college Calculus Help!

    Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x
  17. ELA

    can you help me with my homework]
  18. Math

    Answer is b I had the same question in my packet
  19. english

    Sukie and Lee get up early.Tey are going to grandma today. They will ride in the car with mother and father to get to grandma's house. please can anybody define the major charaters in this paragraph? I think Sukie and lee
  20. Business Psychology

    I have the information down, but having trouble writing it, for instance when trying to put all that goes down in multiple intelligence. There is a lot of info.
  21. Math

    I posted these 2 questions a couple of days ago and although the help I received would have been more appreciated if it didn't come with an underhanded comment, I did see where I made my mistake with the first question, however I would like to know with the second question...
  22. Math

    Well aren't you special to tell me that. You seem to have no idea how to treat people. Hmmm, which deficite would I rather have. Thanks for the disrespectful help. I don't think you should tutor anyone.
  23. Math

    Hello, I have two more rational exponent question that I wanted to verify please: 4x^3y^-2 _________ 2x^-1y^4 = 2x^4y^6 is this correct? 2nd question: [w^1 / w^-3] my answer: = [w^(1)(-4)/ w ^ (-3)(-4)] = w^-4 / w^12 = w^12 / w^4 = w^3 / w Is this right?
  24. math

    I need to simplify the following rational exponent: (64n^9)^2/3 I've done the following but don't think this is right: = 3|64n^18 = 4n^2.62 I don't know how to type in the root symbol so I used | to mean root. Can someone please verify this and if incorrect please ...
  25. math

    If I could hug you I would. You have no idea how helpful this was, I can now proceed with the rest of the equations. Thank you kindly :)
  26. math

    please - How do we manually calculate the Present Value of annuity step by step using this formula: PV=R[1-(1+i)-n / i for example: PV = 2700[1-(1+.065)-4 ___________________ = 9249.66 0.065 How did they get this answer (9249.66)? I'm so lost. just to clarify too, -4 is an...
  27. Math PIZZAZZ

    Does anyone know the answers to the ws with the riddle what did they call the duck who became a test pilot.? please...i really need to get my grade up and pass this class. PLEASE!!!!