Questions Asked on
March 24, 2012

algebra
Question #1 The price of 7 citrons and 10 fragrant wood apples is 88 units. The price of 10 citrons and 7 fragrant wood apples is 82 units. Find the price of a citron and the price of a wood apple. I used 17x=170?????? Question #2 $6300 is invested, part
asked by Jay 
Chemistry(Please check)
1) Which of the following is not amphiprotic? H20, NH4^+^, HSO4^^, H2PO4^^, all choices are amphiprotic. I think that all of these are amphiprotic. I know for sure that H20 and H2PO4^^ are. 2) The ion HPO4^^ has both a conjugate base as well as a
asked by Hannah 
ALGEBRA
A hardware supplier manufactures three kinds of clamps, type A, B, and C. Production restrictions force it to make 20 more type C clamps than the total of the other types and twice as many as B clamps as type A clamps. The shop must produce 380 clamps per
asked by ROSE 
COLLEGE ALGEBRA
An investment of $63,000 was made by a business club. The investment was split into three parts and lasted one year. The first part of the investment earned 8% interest, the second 6% and the third 9%. Total interest from the investments was $4950. The
asked by AMBER 
Chemistry
what volume of oxygen gas measured at 25C and 760 torr is required to react with 1.0L of methane measured under the same conditions of temperature and pressure?
asked by Mitch 
ochem
Which of the trans1,4dimethylcyclohexane is more stable? ("diaxial" or the "diequitorial") What factors cause the observed differences in strain energy between the two conformations of trans1,4dimethylcyclohexane studied above?
asked by cn 
Chemistry
Lewis Structure of Freon (CCI2F2)? And what is shape?
asked by Brock 
Science
Which is the closest to the speed of sound in air? A. 7miles per hour B. 70miles per hour C. 700miles per hour D. 7000miles per hour C?
asked by Derrick 
physics
A person pushes a block up a frictionless incline at a constant velocity. The incline is 35o, and the mass of the block is 28 kg. If he only exerts a horizontal force, how much work does he do if the block travels 7 m along the incline?
asked by jamie 
physics
A ball of circumference 71.5 cm and mass 640 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the
asked by sara 
math
Find a geometric sequence in which the 6th term is 28 and 10th term is 448
asked by shadrack 
pyc
1. Tai decided to join a group protest of his university’s policies because he felt it was the right thing to do, even though his participation might result in being arrested. Tai’s behavior is consistent with Kohlberg’s (Points : 1) preconventional
asked by Lisa 
Statistics
Which of these statements is not true about the variance in a binomial distribution B(n, p)? __________ A. For a fixed p, the variance increases as n increases. B. For a fixed n, the variance is maximum when p = 0.5. C. The variance depends only on n. D.
asked by Anonymous 
pshy
9. What is the general term Freud used to describe the process whereby the mind protects itself against distress? (Points : 1) Compensation Defense mechanism Rationalization Displacement
asked by Lisa 
business
Select a business activity or issue with which you are familiar. For that business activity in that industry or company, discuss how business managers apply the law that is relevant, and identify under what circumstances lawyers should become involved.
asked by Nicole 
kinesiology
how would you ensure proper development of the antagonist muscles at the elbow joint? please explain
asked by sarah 
Algebra
Perimeter of traffic sign is 140 inches. The length is 14 inches longer than the width. Find the dimensions of the sign.
asked by rangel 
Chemistry
What is the mass in kg of 20.0 L of diesel fuel? Assume the fuel has a density of 0.85 g/mL.
asked by Hannah 
Physics
The level of water in a clear, colorless glass is easily observed with the naked eye. The level of liquid helium in a clear glass vessel is extremely difficult to see with the naked eye. Explain. (hint: the index of refraction of liquid helium is close to
asked by chi 
Chemistry
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation. The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to
asked by Jematormal91 
chemistry
draw amino acid.
asked by jack 
math
There are are 20% more girls than boys in the senior class.What percentage of the seniors are girls?
asked by Shambhavi 
to Samantha
Jiskha is not the place to run a survey. Please use http://answers.yahoo.com or something similar for this purpose.
asked by Writeacher 
English/Poetry
Walt Whitman  America Centre of equal daughters, equal sons, All, all alike endear'd, grown, ungrown, young or old, Strong, ample, fair, enduring, capable, rich, Perennial with the Earth, with Freedom, Law and Love, A grand, sane, towering, seated
asked by Amy 
M1, Physics
Two hooks A and B are fixed to a ceiling, where AB is 2.5 m. A small object of mass 3 kg is suspended from A and B by two light inextensible strings so that it is 2 m from A and 1.3 m from B. calculate the tension in strings
asked by John 
chemistry
The following reaction is a singlestep, bimolecular reaction: CH3Br + NaOH > CH3OH + NaBr When the concentrations of CH3Br and NaOH are both 0.135 M, the rate of the reaction is 0.0070 M/s. (a) What is the rate of the reaction if the concentration of
asked by katie 
english
I read the story from behind the veil, but did not really understand could someone help me describe some aspects of its setting where it takes place what mood is created by the details of weather, place, and time and how this setting helps to convey the
asked by kevin 
chemistry
A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times faster than it did at 313 K?
asked by HELP PLEASE 
Physics
A mass of .27 kg is attached to a spring and is set into vibration with a period of .39s.what is the spring?
asked by Emily 
Circuits
I need to calculate the voltage through the resistor and the voltage through the inductor of an RL series circuit for different frequencies. The voltage of the source is 2.5 V. The inductor is at the top and has an inductance of .200 H and the resistor is
asked by Heather 
Physics
A 12 kg object is at the top of a 41 degree inclined ramp. It is released and it reaches the bottom of the 85 m ramp in 2.3 seconds. what is the force of friction between the object and the ramp? What is the coefficient of friction? Can someone help me
asked by Armaan 
Trig
Prove: (cotx sinx)(secxcosx)=sin^2(X)
asked by Blossom 
physics
A 1kg mass (the blue mass) is connected to a 9kg mass (the green mass) by a massless rod 70 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1kg mass, and the rod and masses are free to rotate about this pivot
asked by deb 
math
a bag contains 5 blue, 4 red, 9 white, and 6 green marbles. if a marble is drawn at random and replaced 100 times, how many would you expect to draw a green marble?
asked by toan 
math
A grocery store buys 30 gallons of milk at a cost of $1.58 per gallon. The owner expects a 15% spoilage rate. To achieve a 20% markup based on cost, what should be the selling price per gallon? Round to the nearest cent/
asked by Tina 
physics
Find the density of a 4.2 kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.
asked by jim 
physics
A 19.3 gmass of gold in the form of a cube is 1.00 cmlong on each side (somewhat smaller than a sugar cube).What would be the length of the sides of a cube having four times this mass of gold?
asked by jim 
Biology
If nonessential amino acids are missing from the diet, can essential amino acids be substituted in the protein? I would appreciate some help with this onethank you
asked by Tim 
math
The total amount of interest on a loan of $6,000 for 150 days is $210.50. Using the ordinary interest method, what is the rate of interest on this loan? Round to the nearest hundredth.
asked by Tina 
finance
A $1,000 fave value bond has a remaining maturity of 10 years and a required return of 9%. The bond's coupon rate is 7.4%. What is the fair value of this bond?
asked by angek 
math
Laurie expects to make $100,000 in 2007. Her social security tax rate is 6.20% up to the wage base, Medicare is 1.45%. How much FICA is Laurie expected to pay for the year?
asked by Tina 
OChem
What does it mean for a conformation to be more stage than another conformation in terms of the strain energy? Based on your answer, which of the above conformations of nbutane (eclipsed, gauche, anti) is more stable? What factors cause the observed
asked by cn 
ochem
Which of the cyclohexane conformation is more stable? (chair of boat) What factors cause the observed differences in strain energy between the two conformations of the cyclohexane studied above?
asked by cn 
English
I am creating a document for my NHS, and I'm trying to use the § sign properly. Can you please tell me how to do so?
asked by Mel 
chemistry
supposed the theoritical yield in a reaction is 68.8g, and the percent yield is 66.0%, what is the actual yield of product obtained?
asked by kims 
us history
Which factor, selfinterest or idealism, was more important in driving American foreign policy in the years 18951920?
asked by Sarah 
American Literature
Describe the political role of the poetry of the 1950s? can anyone give a few pointers on this, thanks!
asked by help 
trig
Prove (cscx+cotx)(cscxcotx)=1
asked by Blossom 
mathcheck
I have solved the following questions, let me know if they are correct, thanks. 1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4  4e^x + 8 answer: 4(3x^3  e^x) b. y= (3 + 4e^x)^5 answer: 20e^x
asked by help 
NCSU
A man of mass 83.5 kg walks down the aisle of an airplane at a speed of 1.60 m/s in the forward direction while the plane moves at a speed of 295 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic
asked by Amber 
World History
What were the social costs of World War II? Thanks MC
asked by mysterychicken 
math
When winter jackets are sold for $250 each, an outdoors store can sell 110 in a season. For every $25 nicrease in the price, the number sold drops by 10. If the total sales revenue is $22500, how many of these jackets were sold?
asked by girl123 
english ~ poems
America by James Monroe Whitfield "America, it is to thee, Thou boasted land of liberty,— It is to thee I raise my song, Thou land of blood, and crime, and wrong. It is to thee, my native land, From whence has issued many a band To tear the black man
asked by Ashley 
trig
Prove: (tan x+sec x)^2 = 2sec^2(x)+2tan(x)secx1
asked by Anonymous 
math
I have solved the following questions, let me know if they are correct, thanks. 1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4  4e^x + 8 answer: 4(3x^3  e^x) b. y= (3 + 4e^x)^5 answer: 20e^x
asked by help 
physics
The grid in a highvacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be
asked by Sara 
language arts
i need to write an essay on why it is important to be obedient or to obey people or authority. i just don't have any ideas. help?
asked by gabriela 
Algebra
I don't quite understand how to solve matrices with three variables. If I have the equations: 7x4y2z=0 2x3y+z=0.25 2x2y+5z=0 How can I solve this? I saw the explanation in a site but I didn't understand it. They appeared to make random operations
asked by Amy 
Physics
A rectangular loop of wire, L = 26.2 cm and W = 15.4 cm, carries a I1 = 1.83 A current and lies in a plane (d = 13.6 cm), which also contains a very long straight wire carrying a I2 = 10.5 A current. I used this equation: F1+F2 =
asked by josh 
Chemistry(Please check)
1) Which statement below is correct (true)? a) Since HNO2 is a stronger acid than HF it must have a greater pKa. b) Since HOCℓ is a stronger acid than HCN, then OCℓ– is a stronger base than CN–. c) The dissociation (or ionization) of HOCℓ in
asked by Hannah 
math
find a formula for theta , the angle formed by the intersection of L1 & L2 let L1 and L2 be non parallel lines of slope m1 and m2. m1>m2>0
asked by arnold 
math
how do you simplify 29 over 9
asked by Beau 
Chemistry
What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? HNO3 + Ca(OH)2 >Ca(NO3)2 + H2O What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? H2SO4 +
asked by Kristy 
Math
Is it reasonable to interpret 16 & + 11 have the sum of 5. If not please explain
asked by Maya 
Calculus
Show that the following series is absolutely convergent: Summation from 1 to infinity: [(1)^n * (n+1) * 3^n]/ [2^(2n+1)] I've done the ratio test and replaced n in this series with n+1. I get 3/4 in the end, which is less than 1, which confirms that the
asked by Anonymous 
MATH
If I had one clock that chimes every half hour and the other every 15minutes and they both chimed together at 1. the next time they will chime to gether will be two oclock pm
asked by AMERICAL 
maths
Bob's age is 38 and his son"s age is 4. In how many years' time will Bob's age be twicethe age of his son?
asked by srihita 
maths
Harry and Potter had $224 altogether. When Harry gave 1/5 of his money to Potter, they foundthey had the same amount of money. How much money did each have at the beginning?
asked by srihita 
Chemistry. Please Check!
What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? HNO3 + Ca(OH)2 >Ca(NO3)2 + H2O What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? H2SO4 +
asked by Kristy 
Chemistry
Calculate the pH when 39.0mL of 0.321 of HA is mixed with 39.0mL of 0.321M NaOH where HA is a monoprotic weak acid with Ka= 7.5x10^5 M ?
asked by Jematormal91 
Algebra
If a plane can travel 500 miles per hour with the wind 400 miles per hour against the wind, find the speed of the plane without a wind and the speed of the wind? What is the speed of the plane in still air?
asked by rangel 
Math
1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4  4e^x + 8 answer: 4(3x^3  e^x) b. y= (3 + 4e^x)^5 answer: 20e^x (3+ 4ex)^4 c. y= (e^x  1) / x^2 answer: (xe^x  2e^x +2) / x^3
asked by Samantha 
Chemistry
How would each of the following affect the accuracy of the calculated neutralizing power of antacid (too high, too low, or no effect) a. The titration flask was wet with distilled water when the antacid was added. b. The buret was not rinsed with NaOH
asked by Darrylnn 
Algebra, factor
Factor. (4x^2+8r+3)=( )( )
asked by Libuse 
Algebra
Factor. (2x^2+5x10)=( )( )
asked by Libuse 
algebra 2
the number N of aluminum cans used each year varies directly as the number of people P using the cans if 55 people use 13,805 cans in one year how many cans are used in a cith which has a population of 1,469,000 what is the number of cans used.
asked by kay 
physics
D=m/V=m/ð•R^2•h Find the density of a 4.2 kg solid cylinder that is 13 cm tall with a radius of 5.0 cm. I am lost on the numbers to plug into this one please help
asked by jim 
algebra 2
it takes 5hr for 8 cooks to prepare the food for a wedding rehearsal dinner. How long will it take 7 cooks to prepare the dinner A what kind of variation apples to this situation. B solve the problem
asked by kay 
calculus
1. A conical reservoir has a depth of 24 feet and a circular top of radius 12 feet. It is being filled so that the depth of water is increasing at a constant rate of 4 feet per hour. Determine the rate in cubic feet per hour at which water is entering the
asked by Tiffany 
English
Can you please check of these sentencesa are possible? Thank you. 1) When will you get around to phoning me? 2) He forgot to switch the gas off and he burned the cake. 3) His mother took a day off to drive him to the beach. 4) Peter got at his brother for
asked by Matthew 
Microbiology
Explain how mutations help us define a gene and its function.
asked by Steph 
chemistry
A particular reactant decomposes with a halflife of 103 s when its initial concentration is 0.397 M. The same reactant decomposes with a halflife of 213 s when its initial concentration is 0.192 M. Determine rate order and rate constant.
asked by katie 
Biology
What are gametes produced from the humanbody?
asked by noorie 
SCI207: Dependence of Man on the Environment
Give specific examples of at least two (2) production and two (2) consumption habits humans have related to material resources.
asked by Amanda 
principles of physics
Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is
asked by Kristie 
physics
A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 90.0°. (a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through
asked by Adam 
science
A book is on top of a table. Earth's gravity exerts a constant force of 15N on the book. Why does the book not move as a result of this force?
asked by Josie 
Biology
If you cross 1 inflated pea pod with a constricted pea pod and all of the offspring turn out inflated,is inflated dominant or recessive?
asked by noorie 
Math
For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when
asked by José 
Math
For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when
asked by José 
Management 330
Help with doing a powerpoint presentation with show the Four Functions or management with Ethics
asked by Lori 
physics
A 1kg mass (the blue mass) is connected to a 9kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1kg mass, and the rod and masses are free to rotate about this pivot
asked by please 
Chemistry
Write the chemical formula for the simplest heptane isomer and give its name, b) give the names of two heptane isomers with hexane as the base chain, c) give the names of names of the five heptane isomers with pentane as the base chain, d) give the name of
asked by Hannah 
Precalculus
Verify only working with one side: cos^2x + tan^2x cos^2x = 1
asked by Britney 
Chemistry
Determine the concentration in parts per million if 0.500 moles of NaCl are found in 35000g of a salt water solution. Okay, so I've done questions dealing with ppm and was able to work them out fine, but I can't seem to figure this one out. Any help you
asked by Hannah 
All Sub
If you have 21 questions and you miss 2 whats your score? How do you find out?
asked by Josh 
physics
The temperature at the bottom of Lake Tahoe in the Sierra Nevada Mountains of California is 4°C year round. In which country is water at the bottom of lakes normally higher than this?A) Russia.B) Great Britain.C) New Zealand.D) Tibet.E) Singapore nowhere
asked by Kristie 
physics
The ocean level rises when global temperature rises, due to ____________________. A) Both of these.B) Neither of these.C) melting of ice caps at the poles.D) thermal expansion of water.
asked by Kristie 
history
During a remarkable period of change from roughly 1865 to the early 20th century, the great cities that we know and love today expanded at an incredibly rapid pace and went through a fundamental transformation in composition and construction. Select one of
asked by mary 
Algebra, factor
Factor: (x^2+4x5)=( ) ( )
asked by Libuse 
science
Which of the following has the greatest effect on the formation of rain or snow? A cloud cover B humidity C air pressure D temperature
asked by miki 
physics
A mass M = 0.464 kg moves with an initial speed v = 2.98 m/s on a level frictionless air track. The mass is initially a distance D = 0.250 m away from a spring with k = 844 N/m, which is mounted rigidly at one end of the air track. The mass compresses the
asked by bob please help 
Algebra, factor
Factor, lowest term: (2x^2+5x10)=
asked by Libuse 
MATH
Seven students took a quiz. Four of these students received a score above 85 percent. Students who received at least an 85 percent got a sticker. What percent of the students (rounded to the nearest full percentage number) received a sticker?
asked by Anonymous 
physics
The higher the temperature of an object, the ____________________. A) Neither of these.B) shorter the wavelengths of radiation it emits.C) higher the frequencies of radiation it emits.D) Both of these.
asked by Jim 
Precalculus
Sin^2x1=cos^2x
asked by Britney 
physics
Which of these two bodies gets its internal heat from nuclear processes? A) Both.B) Sun.C) Neither.D) Earth.
asked by Jim 
physics
The difference between energy radiated from the sun and energy radiated from the Earth has to do with ____________________. A) Neither of these.B) Both of these.C) radiation frequencies.D) the amounts of radiant energy.
asked by Jim 
physics
Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is
asked by Kristie 
Science, Chenistry
If you have a tank containing 10,000L of water. what weight of CaSO4.H2O must be added to math the Ca+ concentration of 130ppm
asked by Jenn 
physics
A high jumper wants to clear the bar at 2.1m. To do so he needs to raise his center of mass to a height of 2.4m. Assuming that air resistance can be neglected and his center of mass is 1.1m above the ground at takeoff, determine the required vertical
asked by jamie 
science
Which of the following would most likely cause rising air? A warm air and low pressure B cold air and low pressure C warm air and high pressure d cold air and high pressure
asked by miki 
International Finance
What is an AA curve?
asked by Nancy 
statistics
The data was obtained from car crash experiments. The table values are the chest deceleration data (g) for the dummy in the driver’s seat. Use a 0.05 significance level to test the null hypothesis that the different weight categories have the same mean.
asked by EXHAUSTED ON MATH 
Calculus AP need help!
antiderivative. find f. f'(x)= 3x^(2), f(1)=f(1)=0
asked by MILY 
maths
2cos^2a*cos^2b+2sin^2asin^2b1=cos2acos2b
asked by A.L 
Algebra
The perimeter of a triangle is 52 centimeters. The longest is 2 centimeters less than the sum of the other 2 sides. Twice the shortest side is 13 centimeters less than the longest side. Find the lengths of each side of the triangle. What are the lengths of
asked by CRT angel 
Physics
Our eyes are sensitive to electromagnetic radiation with wavelengths from 400nm to 700nm. What is associated range of frequencies?
asked by chi 
probability/binomial
i'm having trouble with probability and the binomial thm, could i get a good website with problems
asked by joe 
chemistry
A particular reactant decomposes with a halflife of 103 s when its initial concentration is 0.397 M. The same reactant decomposes with a halflife of 213 s when its initial concentration is 0.192 M. what is the reaction order and rate constant
asked by katie 
Math(Please answer, thank you)
(4.44e2  x) (8.06e2  x) / (0.331 + 2x)^2 = 1.80e2 I need to rearrange this equation so that I can get a,b, and c, for the quadratic equation but I am not sure how to do this. Thank you for the help.
asked by Hannah 
Chemistry(Please just check, thank you)
1) The approximate pH of a 3.0 X 10^3 M solution of the strong acid H2SO4 is? I did pH= log(3.0 X 10^3) = 2.5 2)If HCLO2 is a stronger acid than HF, which is stronger than HOCL, then the order of strengths of the conjugate bases of these acids is? My
asked by Hannah 
Circuits
I need to calculate the voltage through the resistor and the voltage through the inductor of an RL series circuit for different frequencies. The voltage of the source is 2.5 V. The inductor is at the top and has an inductance of .200 H and the resistor is
asked by Heather 
Chemistry
How many moles of nitrogen are needed to produce 1.52 moles of nitrogen (ll) oxide ? N2 + O2 > FeCL3 + 3H20
asked by jake 
math
please help, thanks Simplify (9^x . 3^4x)^2
asked by calculus 
chemistry
At 298 K, 1.35 mol BrCl(g) is introduced into a 12.0 L vessel, and equilibrium is established in the reaction. BrCl(g)>0.5Br2(g) + 0.5Cl2(g) Calculate the amount of BrCl(g) present when equilibrium is established.(Use delta G[Br2(g)]=3.11kJ/mol and delta
asked by ian 
math 125
solve the system 2x3yz=8 xyz=2 4x+3y+z=6
asked by martha 
chemistry
A 3.00 flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
asked by chris 
chemistry
A 3.00 flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
asked by chris 
precalc
Find the area of a triangle with sides of length 5 and 8 and included angle 74°. (Round your answer to one decimal place.)
asked by Kelvin 
health
i need help with this quetion What dose it mean work in a psitive and courteous manner and why is this important for
asked by lisa 
PreCalc
Find the values of the trigonometric functions of è from the information given. (sin è, cos è, csc è, sec è, cot è) tan è = −2, sin è > 0
asked by Kelvin 
health
what is the correct procedure to deal with resource shortage
asked by lisa 
Math
Compound interest question: When Aaron invested $100 at 4.5% p.a. annually compounding, it amounted to $142.21. For how many years was it invested? Is there a way to solve this question without using the formula for compound interest?
asked by CrissyXD 
physics
A motorcyclist increases her speed along a straight road from 0 to 120 km/hr in 5 seconds. How much acceleration does she experience
asked by Anonymous 
physics
a ball of mass 4kg is thrown vertically upwards with a velocity of 40m/s.Find amaximum height bheight after 3 seconds ctime of flight
asked by heather 
math
2cos^2a*cos^2b+2sin^asin^b1=cos2acos2b how to prove it
asked by A.L 
Chemistry
A 53 mL sample of a solution of sulfuric acid is neutralized by 37 mL of a 0.18 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L
asked by Chemistry 
math
the heights of 1000 students in a college are normally distributed with a mean 5'10" and a SD of 2". Use 68% for the region from the mean to 1SD on either side; 94% for the region from the mean to 2SD on ether side and 98% for the region from the mean to
asked by Jon 
geometry
A triangle where the base is a square: what is the volume using 8inches,10inches, and 4inches
asked by Shannon 
science
An object is traveling in a straight line in space.No forces are affecting it. What will happen to the object's motion?
asked by Josie 
Physics
For water n(red)= 2.332 and n(blue)=1.340. What are the underwater angles of refraction for the red and blue components of a white light beam in air incident at an angle of 82 on a water surface?
asked by chi 
Physics
For a piece of glass n(red)= 1.635 and n(blue)= 1.689. The respective wavelengths are 680nm (red) and 430nm (blue). Find the angle between these two colors of light in the glass if they were originally in a white light beam in air incident on the glass at
asked by chi 
maths
solve for x given e^(2x)2e^x+1=0
asked by musuma 
math
The portion of a swimming pool that is below the full water line measures 12 feet by 30 feet by 6 feet deep. what is the volume of the water in the swimming pool when it is fully, expressed in cubic yards? (1 cu yd= 27 cu ft )
asked by Anonymous 
chemistry
A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times faster than it did at 313 K?
asked by HELP PLEASE