Rachal

Popular questions and responses by Rachal
  1. Trig

    How can I find the exact value of Sin 480 degrees? Thanks

    asked on May 12, 2011
  2. Algebra

    Miguel is choosing between two exercise routines. In Routine #1, he does only running, burning 15 calories per minute. In Routine #2, he burns 12 calories walking. He then runs at a rate that burns 12 calories per minute. For what amounts of time spent

    asked on May 18, 2011
  3. Algebra

    Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number

    asked on May 12, 2011
  4. Algebra

    Below is the graph of a polynomial function f with real coefficients. Use the graph to answer the following questions about f. All local extrema of f are shown in the graph. I really need help with this one but I can't post the graph.

    asked on February 4, 2011
  5. Algebra

    Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L, the pressure is 165 kPa(kilopascals). What is the volume when the pressure is 60 kPa?

    asked on June 7, 2011
  6. Algebra

    Find the equation of the quadratic function f whose graph is shown below. Ponts on the graph are (-3,-1)(-2,-4) f(x)=

    asked on January 25, 2011
  7. Algebra

    Miguel is choosing between two exercise routines. In Routine #1, he does only running, burning 15 calories per minute. In Routine #2, he burns 12 calories walking. He then runs at a rate that burns 12 calories per minute. For what amounts of time spent

    asked on May 18, 2011
  8. Algebra

    A 3 inch thick slice is cut off the top of a cube, resulting in a rectangular box that has volume 128in^3 .Round your answer to two decimal places

    asked on February 4, 2011
  9. Trig

    Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You

    asked on May 11, 2011
  10. Math

    A department store is holding a drawing to give free shopping sprees to two lucky customers. There are 15 customers who have entered the drawing: 4 live in the town of Gaston, 6 live in Pike, and 5 live in Wells. In the drawing, the first customer will be

    asked on February 21, 2011
  11. Algebra- is my answer right

    Choose the end behavior of the graph of each polynomial function. A f(x)= -5x^3-4x^2+8x+5 B f(x)= -4x^6+6x^4-6x^3-2x^2 C f(x)= 2x(x-1)^2(x+3) A= falls to the left and rises to the right B= Falls to the left and right C=Rises to the right and left.

    asked on February 3, 2011
  12. Trig

    Find all solutions of the equation in the interval [0,2pi). sqrt(3)cottheta-1= 0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

    asked on May 15, 2011
  13. Algebra

    The number of bacteria in a certain population increases according to an exponential growth model, with a growth rate of 11% per hour. An initial sample is obtained from this population, and after four hours, the sample has grown to 4130 bacteria. Find the

    asked on February 3, 2011
  14. Algebra

    Austin is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $104.00 and allows unlimited mileage. Company B has an initial fee of $65.00 and charges an additional $.60 for

    asked on May 18, 2011
  15. pre-algebra-is my answer right

    Rewrite the expression without using a negative exponent. 4z^-4 Simplify your answer as much as possible. is this right? (1/4z^4)

    asked on February 9, 2011
  16. Physics

    Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L , the pressure is 165kPa (kilopascals). What is the volume when the pressure is 60kPa?

    asked on May 23, 2011
  17. Trig

    Find all solutions of the equation in the interval [0,2pi) . cos(theta)=0.7125 If there is more than one solution, separate them with commas. Do not round any intermediate computations, and round your answer(s) to the nearest hundredth. Can someone help me

    asked on May 15, 2011
  18. Math

    You can answer any 8 questions from the 12 questions on an exam. In how many different ways can you choose the 8 questions, assuming that the order in which you choose the questions is irrelevant?

    asked on February 10, 2011
  19. Math

    Suppose that 34% of the people who inquire about investments at a certain brokerage firm end up investing in stocks, 30% end up investing in bonds, and 35% end up investing in stocks or bonds (or both). What is the probability that a person who inquires

    asked on February 10, 2011
  20. Trig- Check my answer Please

    Use a cofunction to write an expression equal to csc(4ð/11). Is the answer csc(4ð/11)= 1/sin(4ð/11)

    asked on May 11, 2011
  21. Algebra-I'm still stuck

    The one-to-one function f is defined by f(x)=(4x-1)/(x+7). Find f^-1, the inverse of f. Then, give the domain and range of f^-1 using interval notation. f^-1(x)= Domain (f^-1)= Range (f^-1)= Any help is greatly appreciated. Algebra - helper, Wednesday,

    asked on February 3, 2011
  22. Algebra- is my answer right

    Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $127 and allows unlimited mileage. Company B has an initial fee of $55.00 and charges an additional $0.90 for

    asked on February 5, 2011
  23. Algebra

    Find a polynomial f(x) of degree 3 with real coefficients and the following zeros. -1,3+i f(x)=

    asked on May 17, 2011
  24. Math ratio word problem

    The ratio of horseshoes to shamrocks was 11 to 5, and two times the number of shamrocks was 12 less than the number of horseshoes. How many were shamrocks? thank you :)

    asked on January 3, 2009
  25. Math 10

    Cashew nuts are sold at 15 per kg. Walnuts are sold at 12 per kg. What quantities of each nut would a store owner put into a 100-kg barrel so that it could be sold for 13.20 per kg?

    asked on June 1, 2016
  26. Trig- Check my answer Please

    Find the reference angle for -144 degrees. I'm coming up with 504 degrees, but I think I'm missing a step.

    asked on May 14, 2011
  27. Statistics- I'm stuck and its due tonight

    In a particular hospital, 6 newborn babies were delivered yesterday. Here are their weights (in ounces): 112, 96, 109, 126, 99, 106 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your

    asked on February 13, 2011
  28. Algebra- I get 1 out of two parts

    Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number

    asked on May 11, 2011
  29. Algebra- is my answer right

    The one-to-one function f is defined by f(x)=(4x-1)/(x+7). Find f^-1, the inverse of f. Then, give the domain and range of f^-1 using interval notation. f^-1(x)= Domain (f^-1)= Range (f^-1)= Any help is greatly appreciated. Algebra - helper, Wednesday,

    asked on February 2, 2011
  30. Algebra

    Ok I got another one I can figure out The one-to-one function f is defined by f(x)=(4x-1)/(x+7). Find f^-1, the inverse of f. Then, give the domain and range of f^-1 using interval notation. f^-1(x)= Domain (f^-1)= Range (f^-1)= Any help is greatly

    asked on February 2, 2011
  31. Algebra

    Multiply. x-(6+2i)][x-(6-2i)] Note that these expressions contain complex numbers. Simplify your answer as much as possible.

    asked on January 23, 2011
  32. Math

    The following is a list of 11 measurements: -2,82,87,-1,-51,-2,53,87,-20,32,35 Suppose that these 11 measurements are respectively labeled. x1,x2¡¦¡¦¡¦¡¦¡¦x11.(Thus,-2 is labeled x1,82 is labeled x2 and so on.) find ¢²_(i=1)^11¢Æx1/49 Round

    asked on February 8, 2011
  33. Math

    Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $127 and allows unlimited mileage. Company B has an initial fee of $55.00 and charges an additional $0.90 for

    asked on February 5, 2011
  34. Algebra

    Solve for v. v+6/5=3/5v-7/3 Simplify your answer as much as possible. This answer cannot be a radical. Thanks

    asked on January 23, 2011
  35. Algebra

    The function h is defined by h(x) . 6+x/4+2x Find h(2x)

    asked on January 23, 2011
  36. Algebra

    The function h is defined by h(x) . 6+x/4+2x Find h(2x)

    asked on January 23, 2011
  37. Math

    Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and

    asked on February 12, 2011
  38. Algebra

    Find all complex solutions of 4x^2+5x+2=0.

    asked on February 3, 2011
  39. Math

    Solve for x. 14^(-3x)=11^(-x-3) Write the exact answer using base-10 logarithms How do I start this problem? Thank You

    asked on February 16, 2011
  40. Algebra

    I don't even know where to start, teacher gave us this with no direction. Suppose the polynomial R(x)=a9x^9+a8x^8+...+a,x+a0 has real coefficients with a9 cannot equal 0. Suppose also that R(x)has the following zeros: 5, 6, 5+5i. Using this information,

    asked on February 4, 2011
  41. Algebra

    To rent a certain banquet hall, there is a reservation fee of $4200.00 and an additional fee of $180.00 per hour. The Russell family wants to spend at most $5100.00 on renting the hall. What are the possible amounts of time for which they could rent the

    asked on January 23, 2011
  42. Trig- Check my answer Please

    Find the unit vector in the direction of . Do not approximate any numbers in your answer. I get (-1/sqrt10) and (-3/sqrt10)

    asked on May 14, 2011
  43. Math

    Solve for x. log3(x+7)=2-log3(x-1) Write the exact answer using base-10 logarithms.

    asked on February 15, 2011
  44. Statistics - can someone check me

    Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and

    asked on February 12, 2011
  45. Math-word problem

    To rent a certain banquet hall, there is a reservation fee of $4200.00 and an additional fee of $180.00 per hour. The Russell family wants to spend at most $5100.00 on renting the hall. What are the possible amounts of time for which they could rent the

    asked on January 24, 2011
  46. Math

    Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth

    asked on February 21, 2011
  47. Statistics-desperate

    I don't know how to post some of the question is there a way I can upload it?

    asked on February 9, 2011
  48. beginning algebra

    The length of a rectangle is 1ft more than twice its width, and the area of the rectangle is 28ft^2 . Find the dimensions of the rectangle. l= w=

    asked on February 9, 2011
  49. Trig

    A ramp 38' long rises to a platform. The bottom of the platform is 20' from the foot of the ramp. Find x , the angle of elevation of the ramp. Round your answer to the nearest hundredth of a degree. After this question I'm done with TRIG!!! Thanks

    asked on May 15, 2011
  50. intermediate algebra-can somebody check my answer

    Evaluate the expression m^2+93+7 when m=-4 -4^2+9*(-4)+7 does it = -13

    asked on February 15, 2011
  51. Algebra

    The polynomial function is defined by f(x)=4x^4+2x^3-8x^-5x+2. Use a calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth.

    asked on May 18, 2011
  52. Trig

    I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

    asked on May 14, 2011
  53. Math

    Can anybody help me start this? Thanks

    asked on February 15, 2011
  54. intermediate algebra

    Write the equation of the line: The points are at (-8,-6) and (0,0). The line passing through these two points has a y-intercept of 0 since it passes through the origin. The slope is -6-0/-8-0=3/4 How would I finish this? Thanks

    asked on February 15, 2011
  55. Trig

    I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. Check all symmetries that apply. 1. y=-ã(4-x^(2)) 2. 34x^(2)+12y^(2)=18

    asked on May 13, 2011
  56. math- check me

    Solve the inequality for x. 16 =3 Is that right?

    asked on February 15, 2011
  57. Physics

    In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?

    asked on February 9, 2011
  58. beginning algebra

    In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?

    asked on February 8, 2011
  59. Algebra

    Graph the equations y=2|x-5|+2

    asked on January 26, 2011
  60. Math

    The polynomial function f is defined by f(x)x^4-3x^3-2x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth

    asked on January 25, 2011
  61. Algebra

    The function g is defined below. g(x)=((x)^(2)-9x+14)/((x)^2-11x+24) Find all values of x that are NOT in the domain of g. If there is more than one value, separate them with commas.

    asked on June 8, 2011
  62. Algebra

    The function h is is defined below. h(x)=48x^2+ 12x - 16 Find all values of x that are NOT in the domain of h. If there is more than one value, separate them with commas. I'm lost.

    asked on May 18, 2011
  63. Trig

    I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. Check all symmetries that apply. 1. y=-sqrt(4-x^(2)) 2. 34x^(2)+12y^(2)=18

    asked on May 13, 2011
  64. math- check me

    f(x)=3 -4|-11+x| -4|-11+3| -4|8| Do I divide or multiply?

    asked on February 15, 2011
  65. Math

    Evaluate the following: |6-10|-|5| I get: |-4|-|5| 4-5 Is the answer -1

    asked on February 15, 2011
  66. beginning algebra

    Factor: -8w+uw+vu-8v

    asked on February 8, 2011
  67. Algebra- is my answer right

    Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation. x4 Thanks

    asked on February 2, 2011
  68. beginning algebra-check my answer

    [(x^2-1)/(x-3)] / [(x^2-x-2)/(3x-9)] I get (3x-3/x-2)

    asked on February 8, 2011
  69. Algebra

    The polynomial function f is defined by f(x)x^4-3x^3-2x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth.

    asked on January 24, 2011
  70. intermediate algebra

    Write the equation of the graph. Points are (-8,-6) and (0,0). I think you start at rise over run. But I'm confused thanks

    asked on February 15, 2011
  71. Trig

    The polynomial function f(x) is defined by f(x)=-4x^4+9x^3+2x^2-7x-2. Use a graphing calculator to find all the points where there is a local minimum. Round to the nearest hundredth.

    asked on May 15, 2011
  1. Algebra

    Thanks!

    posted on June 8, 2011
  2. Algebra

    The function h is is defined below h(x)=(x+6)/(x^2+9x+8) Find all values of x that are NOT in the domain of h. If there is more than one value, separate them with commas.

    posted on May 18, 2011
  3. Trig

    thanks!

    posted on May 14, 2011
  4. Trig- Check my answer Please

    I now think its 36 degrees

    posted on May 14, 2011
  5. Trig

    Thanks!!!!

    posted on May 14, 2011
  6. Trig

    thats supposed to be a neg in front of the 4 in problem 1.

    posted on May 13, 2011
  7. Trig

    Thank you I see where I got stuck

    posted on May 13, 2011
  8. Math

    I got: 2873 = 2600 e^(2.5r) ln(2873 / 2600) = 2.5r [ln(2873 / 2600)] / 2.5 = r r=0.0399381 it says to round the percentage to the nearest hundreth. any help

    posted on February 21, 2011
  9. Math

    I got 2/21 thanks for the input

    posted on February 21, 2011
  10. Math

    I figured it out. Equation: time + time = 60 hrs. --- x/30 + (1425-x)/15 = 60 --- x + 2*1425- 2x = 30*60 --- -x = -1050 x = 1050mL --- x/30 = 35 hrs (time of 1st storm) ----- (1425-x)/15 = 375/15 = 25 hr (time of 2nd storm)

    posted on February 15, 2011
  11. Math

    Thank You

    posted on February 15, 2011
  12. Math

    I get this but i can't remember what else I do The "AND" are is shared. This is the key. Abandoning the lengthy names: A + S = 0.34 ==> S = 0.34 - A A + B = 0.30 ==> B = 0.30 - A S + B - A = 0.35

    posted on February 10, 2011
  13. Statistics-desperate

    Its impossible I have alrady tried and it inserts funky symbols

    posted on February 9, 2011
  14. pre-algebra-is my answer right

    thank you

    posted on February 9, 2011
  15. Physics

    E=IR E=15*8 E=120V -------------- I=E/R I=120/4 I=30 amperes

    posted on February 9, 2011
  16. Math

    I get add -2,82,87,-1,-51,-2,53,87,-20,32,35=300 300/49=6.12244 Round two decimals = .061244 or 61.22? I don't know which way I should go.

    posted on February 8, 2011
  17. beginning algebra

    Well this is a question within the subject I posted. Sorry for not labeling it right

    posted on February 8, 2011
  18. Algebra- is my answer right

    if the answer should be m

    posted on February 5, 2011
  19. Math

    a=127 b=55+.9m 127=55+.9m 72=.9m m=80

    posted on February 5, 2011
  20. Algebra

    Thanks

    posted on February 3, 2011
  21. Algebra- is my answer right

    Got it thanks

    posted on February 3, 2011
  22. Algebra-I'm still stuck

    I want to thank all of you for taking the time to help me understand the problem

    posted on February 3, 2011
  23. Algebra

    I don't know if this is right but this is what I came up with. f^-1=(-7x+1)/(x-4) domain f(^-1)=(-inf,-7)U(-7,inf) range f(^-1)=(-inf,4)U(4,inf) Let me know if it looks right. Thanks

    posted on February 2, 2011
  24. Algebra

    I don't understand what else do I need to do?

    posted on January 25, 2011
  25. Math-word problem

    I got Let t = number of hours hall is rented then 180t + 4200

    posted on January 24, 2011
  26. Algebra

    thanks

    posted on January 23, 2011