O

Popular questions and responses by O
  1. Trigonometry

    Sarah used her calculator to find sin125 degree. She wrote down sin125 degrees = -.57. How could Sarah recognize that her answer is incorrect?

    asked on March 1, 2015
  2. calc

    A poster is to contain 50 square inches of printed matter with margins of 4 inches at the top and bottom and 2 inches at each side. Find the OUTER dimensions if the total area of the poster is the smallest possible.

    asked on March 14, 2016
  3. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure,

    asked on March 6, 2015
  4. Trigonometry

    Use De Moivre's Theorem to write the complex number in trigonometric form (cos(2pi)/7)+ i sin((2pi)/7))^5

    asked on May 25, 2015
  5. Mathematics

    An airplane has an airspeed of 400 km and is heading due west. If it encounters wind blowing north at 120 km/h, how many degrees north from west is the resultant velocity of the plane?

    asked on June 15, 2020
  6. Math

    Katherine spends 7 h a day in school. This includes a 30 min lunch break each day. a) Write a ratio that compares the time for her lunch break with the total time she spends at school each day. b) Write a ratio that compares the time for her lunch breaks

    asked on April 10, 2016
  7. US History

    Which was one objection of the ayatollahs to the rule of the shah of Iran? reduced influence of religion on the government women did not have enough opportunities insufficient acceptance of all people redistribution of wealth across the population

    asked on April 6, 2015
  8. chemistry

    The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s)  2O2 (g) + LiCl (s) If you have 500

    asked on February 20, 2015
  9. English

    ideas for Watsons go to Birmingham

    asked on November 15, 2019
  10. history

    Several US leaders wanted no part in imperialistic practices. Why did these officials think imperialistic policies were such a bad idea? What were a few big problems they saw with conquering foreign lands? HELP ME PLS!!

    asked on January 16, 2019
  11. history

    Develop a logical argument for imperialism in the United States during the 20th Century: Why might it have been something the United States wanted to try? What arguments were our leaders making to let us claim outside territory? PLS HELP ME

    asked on January 16, 2019
  12. Physics

    As you travel through space, you find yourself moving into regions of ever-higher voltage. You are traveling . . . A) perpendicularly to the electric field. B) in exactly the same direction as the electric field. C) in a region with no electric field. D)

    asked on January 21, 2018
  13. Physics

    As you travel through space, you find yourself moving into regions of ever-higher voltage. You are traveling . . . A) perpendicularly to the electric field. B) in exactly the same direction as the electric field. C) in a region with no electric field. D)

    asked on January 21, 2018
  14. psych

    Sales of !@#$%^&ography and the presence of churches in the area appear to be correlated. It may be the case that neither causes the other. Perhaps a separate factor, such as population density, accounts best for both aggression and ice cream sales. This

    asked on February 24, 2017
  15. math

    Ana and john are salespeople at store.If they made 36 sales one day and john sold three less than twice Ana's sales total,how many did john sell?

    asked on November 9, 2016
  16. math

    Ana and john are salespeople at store.If they made 36 sales one day and john sold three less than twice Ana's sales total,how many did john sell?

    asked on November 9, 2016
  17. math

    gleo bought a new car it cost 23500 each year it loses 15% of its value what would it be worth when its 15 years old

    asked on February 13, 2016
  18. algebra

    His job pays a starting salary of $32,000 with a 5% raise at the end of each year. Give his salaries for the first 5 years he works.

    asked on November 9, 2015
  19. precalculus (check answer)

    given that x is in quadrant 1 and that sin x = 2/3, find exact the value for: sin (3pi/8) = - √(1-√2) / (2√2) is my answer correct?

    asked on October 28, 2015
  20. precalculus

    given that x is in quadrant 1 and that sin x = 2/3, find exact values for: is this correct? 1) sec (30° + x) = -3/√15 2) cos (1/2 x) = √(-√5)/2

    asked on October 28, 2015
  21. Trigonometry

    Calculate the modulus and argument of each: a. 1 + i b. √3 + i c. -2i d. -5 e. -5 + 5i f. 7√2 + 7i g. -3 -4i

    asked on May 26, 2015
  22. Trigonometry

    Evaluate the expressions a. arctan(-(sqrt3)) b. Arctan(-(sqrt3)) and tell the difference between the two...

    asked on March 28, 2015
  23. Trigonometry

    Solve each equation on the interval [0, 2pi): a. 4sin^2(x)-3=0 b. cos(3x)=-1

    asked on March 28, 2015
  24. Chemistry

    The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s) ---> 2O2 (g) + LiCl (s) If you have

    asked on March 6, 2015
  25. Calculus

    How do you find the derivative of y=5sin(-x)

    asked on May 13, 2014
  26. math

    use mathematical induction to prove -1/2^n = 1/2^n - 1

    asked on July 19, 2013
  27. Math

    How would you solve these questions using Trigonomic Identities? sin^2x = tan^2x/1+tan^2x sinx+cosx/tanx = 1/cosxtanx

    asked on November 4, 2012
  28. math

    if iron weighs 0.25lbs. per cubic inch, an iron bar 8'6" by 4" by 1/2" weighs?

    asked on July 16, 2012
  29. Math

    the number sacks necessary for a 4inch sidewalk 6ft wide and 27ft long at 6 sacks of cement per cubic yard of concrete is?

    asked on July 16, 2012
  30. chemistry

    the acid-dissociation constanstant for acetic acid CH3COOH(aq)H+(aq)+CH3COO-(aq) is known to be 1.8X10^-5 at 25C Caclulate G0f forCH3COO-(aq). G0f=-396.56KJ/mol for CH3COOH (aq), 0 Kj/mol for H+ explain your answer

    asked on March 5, 2012
  31. Chemistry

    one mole of ideal gas is slowly heated at a constant pressure of 2.0 atm from 200 to 300k.Calculate q,w,£GE,and£GH,allinjoules.AssumeCp=5 2 R p =1 atm n =2 Cp =(5/2)R £GT =300-200 = 100 k so Cv =Cp -R = (3/2)R q =nCp£GT= 2(5/2)R*100 = 500R =500*8.314

    asked on March 2, 2012
  32. psychology

    According to behavioral treatment approaches, abnormal behavior is learned through: (Points: 5) thoughts based on the perception of events. vicarious experiences. rewards and punishments. conflict experiences in early childhood.

    asked on January 29, 2012
  33. psychology

    Stress has the ability to cause the immune system to: (Points: 5) be under stimulated. attack rather than support the body. repair itself. increase its resources.

    asked on January 29, 2012
  34. calc

    Suppose the cost C(q) (in dollars) of producing a quantity q of a product equals C(q) = 500 + 2q +1/5q2. The marginal cost MC(q) equals the instantaneous rate of change of the total cost. Find the marginal cost when a quantity of 10 items are being

    asked on February 7, 2010
  35. math

    Determine solutions for: tanxcos^2x - tanx = 0 in the interval[-2pi, 2pi]

    asked on November 20, 2009
  1. science

    Saying "F" isn't cursing. Ms Sue on a different post was being rude to a 3rd grader for asking help on a question

    posted on September 3, 2020
  2. science

    o

    posted on September 3, 2020
  3. maths

    Isksooppppw As

    posted on August 26, 2020
  4. Socials-Ms. Sue

    ok

    posted on April 23, 2020
  5. Probability

    My calculations show: fX(x)=2*x*(1-p)+p*1 E[X]=(4-p)/6

    posted on April 21, 2020
  6. Social Studies

    HELP WITH TJIS OE DIE

    posted on March 19, 2020
  7. math

    Are you 100% sure?

    posted on February 3, 2020
  8. math

    Almost as big as my pp

    posted on November 8, 2019
  9. math

    Have you tried rice.

    posted on November 8, 2019
  10. Science

    Shayla is correct

    posted on October 4, 2019
  11. Mathematics

    oof

    posted on May 29, 2019
  12. Social studies

    Are these 6th or 7th grade answers

    posted on May 22, 2019
  13. Math

    RSM RSM RSM RSM RSM RSM

    posted on May 19, 2019
  14. physics

    I love how no one helped great job!

    posted on May 11, 2019
  15. Social Studies

    you can copy and paste BUT you must put it in your own words.

    posted on April 28, 2019
  16. history

    Thank you, Ms. Sue, I will put it into my own words!

    posted on January 16, 2019
  17. math

    HEY! you guys have no right to say that on this website!!! Go do something else!!!! Some people probably enjoy learning, unlike you guys.

    posted on May 24, 2018
  18. physics

    how can I see the answer?

    posted on February 12, 2018
  19. Computer Ntwrks

    1111001111100000

    posted on December 3, 2017
  20. english

    Keyword search

    posted on December 13, 2016
  21. U.S History

    thanks evangeline!

    posted on September 13, 2016
  22. American Constitutional Law

    agreement to tax

    posted on May 5, 2016
  23. chemistry

    k

    posted on January 5, 2016
  24. Statistics

    Find the 80th percentile of the distribution of fly balls

    posted on December 9, 2015
  25. chemistry

    so how do you solve this problem?

    posted on October 15, 2015
  26. Algebra 1

    no

    posted on January 5, 2015
  27. statisitcs

    ????

    posted on October 23, 2014
  28. science

    2+2=7

    posted on October 30, 2013
  29. chemistry

    1.15*10^15

    posted on April 28, 2013
  30. Math

    12 sacks

    posted on July 16, 2012
  31. problems faced in conserving kalimantan rainforest

    fail, i couldn't get the info i wanted.

    posted on May 1, 2008