# 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?

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.

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,

4. ## Trigonometry

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

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?

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

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

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

9. ## English

ideas for Watsons go to Birmingham

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!!

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

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)

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)

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

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?

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?

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

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.

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?

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

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

22. ## Trigonometry

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

23. ## Trigonometry

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

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

25. ## Calculus

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

26. ## math

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

27. ## Math

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

28. ## math

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

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?

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

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

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.

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.

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

35. ## math

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

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

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