Questions Asked on
December 19, 2013

  1. science

    2. Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. List and briefly outline the six different periods into which the Paleozoic era is divided. so i cannot find it in

    asked by vanessa
  2. science

    Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.

    asked by vanessa
  3. Geography

    I need help on this!!! Which event had the greatest impact on the culture of south America? A. the immigration of laborers from asia B. the completion of the panama canal C. the rise of Marxist revolutionaries D. the arrival of Spanish conquerors Is it D?

    asked by Anonymous
  4. Not sure what subject

    im not sure 38. In terms of a PowerPoint presentation really being three or more separate presentation, which of the following does not apply? a. the words out of your mouth b. the paper handouts you give your audience members after your presentation is

    asked by Kraziekatt99
  5. math

    During last week's visit to this same pear tree, Pete ate 3 times as many pears as Tweet, and Tweet ate 5 fewer pears than Honk. If together the boys ate 25 pears, how many pears did Honk eat during last week's visit?

    asked by Anonymous
  6. Chemistry

    If 1.50 g of H2C2O4 2H2O were heated to drive off the water of hydration, how much anhydrous H2C2O4 would remain? Thank you! Please explain clearly.

    asked by Jane
  7. *th Grade Language Arts Ms. Sue Help

    simple, compound, complex, or compound-complex? 1. Yes, I have a bad case of the flu, and because I need to get well soon, I won’t think about returning to school just yet. compound 2. Because they have been preserved well over time, many ancient scrolls

    asked by Kraziekatt99
  8. algebra

    simplify the expression -5+i/2i

    asked by helen
  9. Physics AP

    A conical pendulum is formed by attaching a 50 g mass to a 1.2m string. The mass swings around a circle of radius 25cm. A claculate the speed of the mass. B Calculate the acceleration of the mass. C calculate the tension in the string

    asked by Robert
  10. Geography

    What was one direct result of the Columbian exchange? A. Europeans began to use horses to plow fields B. American Indians built large urban centers C. American Indians adopted European artistic techniques D. Europeans spread diseases to American indians

    asked by Anonymous
  11. Statistics

    Which of the following will increase the power of a statistical test? a. Change Ą from .05 to .01. b. Change from a one-tailed test to a two-tailed test. c. Change the sample size from n = 100 to n = 25. d. None of the other options will increase power.

    asked by Lyndyc
  12. History

    Can someone help me with these 2 questions please? thanks!! :) 1. Why did President Madison veto a bill that supported government funding of internal improvements? (1 point) The Second Bank of the United States did not have enough money to pay for the

    asked by Kasey
  13. Debate?

    so here are a few Qs im not sure of 38. In terms of a PowerPoint presentation really being three or more separate presentation, which of the following does not apply? a. the words out of your mouth b. the paper handouts you give your audience members after

    asked by bigurl1.4
  14. Stats

    Suppose the following data are selected randomly from a population of normally distributed values. 42 51 43 48 41 57 54 39 45 48 45 39 46 Construct a 95% confidence interval to estimate the population mean. Round the intermediate values to 2 decimal

    asked by Tyler
  15. Algebra 1 (Reiny or Kuai)

    Can a solution of a linear inequality lie on a dashed boundary line? Explain.

    asked by Anonymous
  16. biology

    After a family picnic, Ella dumped the ice and rock salt from the ice cream maker in the back yard. That area of yard now contains dead, brown grass. Explain why this happened, and use the words hypotonic, hypertonic, and plasmolysis in your explanation

    asked by anonymous
  17. geometry

    In a triangle MNO with altitude NP with MP of 15 and NP of 9 what is the length of PO? MNO creates a right angle!

    asked by Blake
  18. algebra

    simplify the number using the imaginary unit i. square root of -16

    asked by helen
  19. Statistics

    When is there a risk of a Type II error? a. whenever H0 is rejected b. whenever H1 is rejected c. whenever the decision is "fail to reject H0" d. The risk of a Type II error is independent of the decision from a hypothesis test.

    asked by Lyndyc
  20. CALCULUS - Check my answers :)

    I'd appreciate corrections for the ones I get wrong. :) Thanks! 1. Determine which of the following is true for the function f(x) = x^3 +5x^2 - 8x +3. I. f(x) has a relative minimum at x = 2/3. II. f(x) has a relative maximum at x = 2/3. III. f(x) has a

    asked by Samantha
  21. SP180-Assignment 6_06 and7_07

    a. Why banning the use of cell phones while driving should be mandatory nationwide b. What I see as the biggest challenges young adults face today can someone help me write these two assignment? ppls

    asked by HK
  22. Calc help - check rest of answers, please?

    4. Find the tangent line approximation, L(x), of f(x)=x^2/3 at x = 8. L(x) = 4/3x-20/3 L(x) = 2/3x+8 L(x) = 4(x-8) L(x) = 1/3x + 4/3 *L(x) = 4/3x - 8/3 5. A balloon is rising at a constant speed of 5 ft/sec. A boy is cycling along a straight road at a

    asked by Samantha
  23. math

    A triangle has vertices with coordinates (2, 0), (3, -1), and (-2, -5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image.

    asked by james
  24. math

    A two-digit number is chosen at random.What is the probability that the chosen number is a multiple of 7 ? please answer and explain

    asked by peter
  25. Finance

    Damon Enterprises' stock is currently selling for $25.00 per share. The stock's dividend is projected to increase at a constant rate of 7% per year. The required rate of return on the stock, rs, is 10%. What is Damon's expected price 4 years from today?

    asked by Anonymous
  26. chemistry

    what is the percentage yield for Sr(NO3)2 + Na2SO4 -> SrSO4 + 2 NaNO3. mass of strontium nitrate is 0.788g mass of sodium sulfate is 1.258g mass of dry filter paper 0.759 g mass of dried precipitate in filter paper 1.317g

    asked by Dianna
  27. lang arts 8th

    Label the sentence below as active or passive. Random people were visited by pollsters. a. active b. passive

    asked by bigurl1.4
  28. chemistry

    The human eye responds to a light stimulus (generates a sensation of "light") upon receiving light energy of 10eV (and more). If we take 6000 angstroms as the average wavelength, how many photons must the eye receive to register a light sensation?

    asked by Peter
  29. Math

    ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .

    asked by Lwint
  30. Advanced Functions/ Precalculus Log

    1. Evaluate 4^(log base4 64) + 10^(log100) 2. Write 1+log(base2)x^3 as a single logarithm 3. Write log(base b)√(x^3 y z^6) 4. Solve log(base 2)x-log(base 2)6=log(base 2)5+2log(base 2)3 5. Solve 3^(2x) = 9(81^x) 6. Solve 3^(2x)=7^(3x-1). Round answer to

    asked by Jessie
  31. math

    Arturo Muina is the captain of a charter fishing boat. He is paid salary of 140 per day He also averages tips amounting to 12% of 475 daily charter rate. Last month during a fishing tournament, Arturo worked 22 days. What were his total gross earnings for

    asked by Jessica
  32. Geography help

    which identifies one culture factor that unites the people of Latin America? A. they are citizens of the same country B. most are roman catholic c. most speak English and Arabic D. they were once ruled by the same powerful emperor

    asked by Anonymous
  33. Physics

    A automobile travels at a speed of northward along a street, and a 7000-N sports car travels at a speed of eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocity

    asked by Bryan
  34. Geography help

    How does the sahara desert influence migration patterns in Africa? I seriously need help on this! thank you! :)

    asked by Anonymous
  35. math

    A triangle has vertices with coordinates (2, 0), (3, -1), and (-2, -5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image.

    asked by james
  36. Finanace HELP!

    Below is what I have available to solve current assets. I would like to solve how much cash is available to the company as well. How much cash does the company have? If the current liabilities are $2,575, what are the current assets? • Net worth $17800

    asked by Bree
  37. Check a few more CALC questions, please?

    I feel pretty good on my answers. Are there any I got wrong? Thank you for the help! 1. If g(x) = tan (5x^2), then g′(x) = * 10x sec2(5x2) sec2(5x2) –10xsec(5x2)tan(5x2) 10sec2(5x2) 7xsec2(5x2) 2. The inflection point of the curve y = x4 − 8x3 + 24x2

    asked by Samantha
  38. Physics- hard problem

    A 14000 N automobile travels at a speed of 40 km/h northward along a street, and a 7000 N sports car travels at a speed of 62 km/h eastward along an intersecting street.(a) If neither driver brakes and the cars collide at the intersection and lock bumpers,

    asked by Bryan
  39. Chemistry

    You are operating an X-ray tube with a molybdenum (Mo) target by applying an acceleration potential of 50 keV. Calculate the values of two characteristic wavelengths, λKα and λSWL. Express your answers in meters.

    asked by Menes
  40. Math

    Question 11 of 20 5.0 Points The percentage analysis of changes of corresponding items in comparative financial statements is referred to as horizontal analysis. A. True B. Fals A

    asked by Angela
  41. MATHS

    Stacey spent 1/ 6 of her money on a purse and 7/12 more money on a bag than on the purse. What fraction of her money did she spend?

    asked by LARA
  42. Science (Balanced/Unbalanced Forces)

    "Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance.

    asked by Alexandra
  43. Finance

    Now that you have a full time job you are ready to start investing for retirement. Your corporation will match 50 cents of each dollar that you put in your 401K account up to the first $7,000. You have altogether $15,000 that you can afford to save this

    asked by Heather
  44. chemistry

    The particle wavelength of your lecturer in 3.091 on his way from the office to 10-250 (200 yards, 1 yard = 0.9144 m) has been determined to be 4.045 x 10 -36m. Taking his body weight to be 178 lbs (1 lb = 0.4536 kg), how long does it take him to get to

    asked by Peter
  45. Biology

    ***I read the textbook assignment and I have read all the information on the lesson, however I cannot find the answer to this question. Nor can I find anything written about it anywhere in the lesson. Please help a girl out.*** True or False? There are

    asked by Erin
  46. Physics 11 Forces Unit

    I'm not sure if my answers are correct. Your help will be greatly appreciated. Thanks in advanced! 1. two very large cruise ships each have a mass of 415000 tonnes. If they were docked side by side, 1.0m apart, their centres would be 60m apart. What is the

    asked by Jessie
  47. physics

    If an oxygen atom is 16 times more massive than an hydrogen atom, how much more massive is the "amount" of oxygen separated from any amount of water than the "amount" of hydrogen?

    asked by Anonymous
  48. math

    the perimeter p of a rectangle can be found using the formula p=2(l+w) where l represents the length and w represents the width. which equation represents the width in the terms of p and l. a) w=2(p-l) b)w=p-l/2 c) w=2p-1 d) w=p/2-1 p=2l+2w p-2l/2=w

    asked by B8
  49. algebra help

    how can direct variation be easily identified on a table equation on a graph?

    asked by cv
  50. physics

    1. Calculate the de Broglie wavelength in picometers (1 picometer =10^−12 meters) of an electron that has kinetic energy of 10 keV. The mass of an electron is 9.11 x 10^−31 kg 2. Winter is coming, so I want to make a 1500 W heating coil which will plug

    asked by Joshua Pams
  51. Calculus

    what is the limit n to infinite of cos1*cos(1/2)*cos(1/4)*cos(1/8)*cos(1/16)*...*cos(1/2^n)

    asked by CHRIS
  52. Health (Ms. Sue)

    Describe the relationship between the HIV-antibody test and being HIV positive. A: The HIV-antibody test and being HIV positive correspond with each other as HIV positive is one of the results of the HIV-antibody test?

    asked by Anonymous
  53. 8th Grade Language Arts Ms. Sue Help

    Select whether the sentence below is a simple, compound, complex or compound-complex sentence However, when David came to conquer the city with his army, he discovered that the Jebusites got their drinking water from a spring just outside the city walls.

    asked by Kraziekatt99
  54. math

    Fran Molley is married, claims five withholding allowances, and earned 3,500 gross per month in edition to federal income tax, social security, and Medicare withholding , Fran pay 2.1% state income tax, and 1/2% for state disability insurance ( both based

    asked by Jessica
  55. math

    a. Solve a - 9 = 20 b. Solve b - 9 > 20 c. How is solving the equation in part a similar to solving the inequality in part b? d. How are the solutions different?

    asked by victoria
  56. biology

    Gene cloning can involve inserting genes into A. machines. B. humans. C. plants. D. protein. this is not D, and i don't think it's A. if i had to guess, i'd pick C but i'm unsure if it could be B as well.

    asked by orpheus
  57. Accounting

    A firm has $200,000 in total assets and $120,000 in owner's equity. What are the total liabilities? A. $80,000 B. $200,000 C. $320,000 D. Cannot be determined from the information given A

    asked by Angela
  58. Accounting

    Please use the following information to answer questions 4-5: Cash $10,000 Accounts Payable $7,000 Accounts Receivable $6,400 Mortgage Payable $65,000 Supplies $1,500 Long-term Debt $36,000 Building $150,000 Notes Payable $9,000 Equipment $80,000 Preferred

    asked by Angela
  59. Science (Help, please!)

    "Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance.

    asked by Alexandra
  60. Catering and Business

    The planned effort to present a unique image through newspapers, community events, and other visible places is called A. press release. B. public relations. C. branding. D. advertising.

    asked by Ruru
  61. math

    find the slope of the linethat passes through the given points (4,6) and (4,4)

    asked by ann
  62. Geography

    what would be an example of a formal region? A. the DFW metroplex B. the united states C. the Midwest D. the Mississippi river

    asked by Anonymous
  63. abnormal behavior

    1. Some criteria used for reaching a diagnosis cannot be observed directly 2. Personality disorders can be similar to each other. 3. People with different personalities can be given the same diagnosis 4. Do you think that personality disorders are true

    asked by Ron
  64. Math

    15-75x=13-50x I combine like terms first 75x-50x?

    asked by Jerald
  65. cal

    Evaluate the integral. ∫ 28e^(√7x)/(2√x) dx

    asked by tom
  66. Science

    How do you do a double conversions and metric measurements? 32km/hr > m/s Like how do you convert that?

    asked by Emma
  67. math

    When James drove to a concert last night, it took him 3 hours and 30 minutes. He averaged 60 miles an hour on the way there. How far did he drive one way?

    asked by lulu
  68. Math

    Please use the following information to answer questions 4-5: Cash $10,000 Accounts Payable $7,000 Accounts Receivable $6,400 Mortgage Payable $65,000 Supplies $1,500 Long-term Debt $36,000 Building $150,000 Notes Payable $9,000 Equipment $80,000 Preferred

    asked by Angela
  69. Accounting

    A firm's __________ account is categorized as a current asset. A. equipment B. accounts payable C. bonds payable D. merchandise inventory D

    asked by Angela
  70. Accounting

    The percentage analysis of changes of corresponding items in comparative financial statements is referred to as horizontal analysis. A. True B. Fals A

    asked by Angela
  71. engineering

    In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential

    asked by Timothy Boons
  72. Science

    A persistent organic pollutant is estimated to have a half-life of 30y. If 3 tonnes of the chemical exists in a polluted area today, how much of the chemical will remain after 120y.

    asked by Lily
  73. ag

    which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress

    asked by adrian
  74. Science

    Design an experiment to determine what level of a new synthetic insect killer called Beegone is lethal to geraniums.

    asked by Lily
  75. Science

    Explain how an increase in agricultural activity might affect a local fishery.

    asked by Lily
  76. Coordinates in 3-D, Polar Coordinates, Precalculus

    Let a and b be real numbers. Describe the graph of r = a cos (theta + b) as much as possible. (The intent of this question is to get as specific a description as possible that holds for all possible values of a and b.) How would I proceed on this problem?

    asked by Cambridge
  77. math

    If #(w,x,y,z)means you square the product of all the terms, for all positive value of w,x,y, and z and #(1,2,3,z)=144, then z = ? please explain how to do that

    asked by peter
  78. math

    If #(w,x,y,z)means you raise w,x,and y to the power of z and then take the sum of the resulting values ande # (8,10,11,z)=3,then for all positive values of z, then z=? please explain how to do that

    asked by peter
  79. math

    If # (a,b,c,d) means you take the positive value of the square root of each term, then add the resulting values, and # (a,36,16,9)=15, then a = ? please explain

    asked by peter
  80. math

    1. x + 8 -40 3. -8x > -64 a) x < 8 b) x > 8 c) x 72

    asked by victoria
  81. math (Reiny)

    If # (a,b,c,d)means you raise b,c and d to the power of a and then take the sum of the resulting values, and # (2,3,4,d)=89,then d=? 2^a + 3^a + 4^a = 89 1^a + 1^a + 1^a = 89 3^a = 89 a = 86 an I do it right

    asked by peter
  82. Algebra 1

    5x-2y=4 3x+y=9

    asked by Shadae
  83. Pre-Calc

    Prove: 2 - sec^x / 1+ tan ^x = cos 2x

    asked by Jack
  84. math

    If #(a,b,c,d)means you subtract the sum of the terms from zero, and # (4,-8,11,d)=14, then d= answer and explain

    asked by peter
  85. Math

    What is the principal square root of the square of a number?

    asked by Krystina
  86. science sybiotic relationships

    What is a commensalism relationship for a Baltimore Checkerspot Butterfly? Please help by 7:00

    asked by lollipops
  87. algebra

    last month joe biked 11times as many miles as lee together they biked a total 156miles how many miles did joe bike last month

    asked by Anonymous
  88. cal

    Find the derivative of y with respect to x,t, or theta, as appropriate. y = ∫ ^(√4x) ^basedown√x (ln(t^2)) dt

    asked by tom
  89. Geometry.

    prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??

    asked by Sammy
  90. 4th grade math

    it takes jupiter 12 years to orbit the sun. how many days does it take jupiter to orbit the sun?. add 3 days for leap years

    asked by mythreyee
  91. Geometry.

    can you imply something if you are given that two altitudes intersect in a triangle?

    asked by Sammy
  92. math

    Find the value of df^-1/dx at x=f(a). f(x)=5x+8, a=-1 i got 5?

    asked by jai
  93. algebra help

    how can direct variation be easily identified on a table equation on a graph?

    asked by cv
  94. Geography

    what would be an example of a formal region? A. the DFW metroplex B. the united states C. the Midwest D. the Mississippi river So would this be B?

    asked by Anonymous
  95. Geography

    Beijing, china is a huge industrial and population center. because of this its what is a major problem? A. transportation B. discrimination C. pollution D. Migration Is it c?

    asked by Anonymous
  96. math

    tion 1 of 20 5.0 Points A firm's __________ account is categorized as a current asset. A. equipment B. accounts payable C. bonds payable D. merchandise inventory D

    asked by Angela
  97. Math

    __________ accounts show the amount of money owed to the firm by customers. A. Supply B. Prepaid C. Receivables D. Payables C

    asked by Angela
  98. Math

    A firm has $200,000 in total assets and $120,000 in owner's equity. What are the total liabilities? A. $80,000 B. $200,000 C. $320,000 D. Cannot be determined from the information given A

    asked by Angela
  99. Math

    Given a net income of $90,000, what is the return on investment for 2000? A. 7.9% B. 22.22% C. 22.78% D. 24.8% C

    asked by Angela
  100. Math

    The ratio of __________ to __________ is an example of a __________ ratio. A. quick assets; current liabilities; leverage B. cost of goods sold; total assets; asset utilization C. net credit sales; average owner's equity; leverage D. net income after

    asked by Angela
  101. Accounting

    __________ accounts show the amount of money owed to the firm by customers. A. Supply B. Prepaid C. Receivables D. Payables C

    asked by Angela
  102. Accounting

    Given a net income of $90,000, what is the return on investment for 2000? A. 7.9% B. 22.22% C. 22.78% D. 24.8% C

    asked by Angela
  103. Accounting

    The ratio of __________ to __________ is an example of a __________ ratio. A. quick assets; current liabilities; leverage B. cost of goods sold; total assets; asset utilization C. net credit sales; average owner's equity; leverage D. net income after

    asked by Angela
  104. algebra 2

    if a system of equations has no solution then it is what?

    asked by betty
  105. Algebra 2 9th/11th grade math

    Expand each binomial. (L-2t)^2

    asked by Lyss
  106. statistics

    For these 90 times the mean was 15.60 minutes and the standard deviation s=1.80 minutes. Find the margin of error (round to 2 decimal places) and the 95% confidence interval for Julia’s average running time.

    asked by sue
  107. math

    54 divi 106

    asked by tara
  108. physics

    If a solid is stretched or compressed beyond the point that it can return to its original shape it has passed its

    asked by Anonymous
  109. Dog training

    4.Which of the following is notconsidered to be a natural, or inherited, ability? A.Nose C.Search B.Pointing D.Delivery to hand 5.Typically, what is the generally recognized maximum distance for a retrieve? A.100 feet C.100 yards B.250 feet D.200 yards

    asked by Steve