O
Popular questions and responses by O
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 
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 
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 
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 
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 
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 
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 
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 
English
ideas for Watsons go to Birmingham
asked on November 15, 2019 
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 
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 
Physics
As you travel through space, you find yourself moving into regions of everhigher 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 
Physics
As you travel through space, you find yourself moving into regions of everhigher 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 
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 
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 
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 
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 
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 
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 
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 
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 
Trigonometry
Evaluate the expressions a. arctan((sqrt3)) b. Arctan((sqrt3)) and tell the difference between the two...
asked on March 28, 2015 
Trigonometry
Solve each equation on the interval [0, 2pi): a. 4sin^2(x)3=0 b. cos(3x)=1
asked on March 28, 2015 
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 
Calculus
How do you find the derivative of y=5sin(x)
asked on May 13, 2014 
math
use mathematical induction to prove 1/2^n = 1/2^n  1
asked on July 19, 2013 
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 
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 
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 
chemistry
the aciddissociation 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 
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 =300200 = 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 
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 
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 
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 
math
Determine solutions for: tanxcos^2x  tanx = 0 in the interval[2pi, 2pi]
asked on November 20, 2009

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 
science
o
posted on September 3, 2020 
maths
Isksooppppw As
posted on August 26, 2020 
SocialsMs. Sue
ok
posted on April 23, 2020 
Probability
My calculations show: fX(x)=2*x*(1p)+p*1 E[X]=(4p)/6
posted on April 21, 2020 
Social Studies
HELP WITH TJIS OE DIE
posted on March 19, 2020 
math
Are you 100% sure?
posted on February 3, 2020 
math
Almost as big as my pp
posted on November 8, 2019 
math
Have you tried rice.
posted on November 8, 2019 
Science
Shayla is correct
posted on October 4, 2019 
Mathematics
oof
posted on May 29, 2019 
Social studies
Are these 6th or 7th grade answers
posted on May 22, 2019 
Math
RSM RSM RSM RSM RSM RSM
posted on May 19, 2019 
physics
I love how no one helped great job!
posted on May 11, 2019 
Social Studies
you can copy and paste BUT you must put it in your own words.
posted on April 28, 2019 
history
Thank you, Ms. Sue, I will put it into my own words!
posted on January 16, 2019 
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 
physics
how can I see the answer?
posted on February 12, 2018 
Computer Ntwrks
1111001111100000
posted on December 3, 2017 
english
Keyword search
posted on December 13, 2016 
U.S History
thanks evangeline!
posted on September 13, 2016 
American Constitutional Law
agreement to tax
posted on May 5, 2016 
chemistry
k
posted on January 5, 2016 
Statistics
Find the 80th percentile of the distribution of fly balls
posted on December 9, 2015 
chemistry
so how do you solve this problem?
posted on October 15, 2015 
Algebra 1
no
posted on January 5, 2015 
statisitcs
????
posted on October 23, 2014 
science
2+2=7
posted on October 30, 2013 
chemistry
1.15*10^15
posted on April 28, 2013 
Math
12 sacks
posted on July 16, 2012 
problems faced in conserving kalimantan rainforest
fail, i couldn't get the info i wanted.
posted on May 1, 2008