Questions Asked on
March 26, 2016

TRIGONOMETRY
Express tan theta in terms of cosec theta
asked by MaThS 
Chemistry
Calculate the empirical formula of Tylenol: C, 63.56%; H, 6.00%; N, 9.27%; O, 21.17%
asked by Jamie 
trigonometry
A tree is broken over by the wind. It forms a right angled triangle with the ground. If the broken part makes an angle of 60° with the ground and the top of the tree is now 20m from its base, how tall WAS the tree?
asked by MaThS 
science
you are given one litre each of 0.5 M HCL and 0.2 M HCL. How should they be mixed so as to give maximum volume of 0.4 M HCL.
asked by mehreen 
math
A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. 2. 2 or more will be
asked by farahan 
science help PLS
A home gets its water from a private well. Which of the following would be the best way for the homeowner to obtain a waterquality report? A.Hire a local contractor to test the home's water supply B.Record observations made by smelling and tasting the tap
asked by Oscar 
Calculus
A smokestack deposits soot on the ground with a concentration inversely proportional to the square of the distance from the stack. With two smokestacks d miles apart, the concentration of the combined deposits on the line joining them, at a distance x from
asked by Leanna 
Geography
Whereas reapportionment adjusts the amount of political representation give to a certain geographical area, redistricting adjusts A) country, state and/or county boundaries. B) population size. C) the gerrymander. D) Federal lands. E) the geographical
asked by Elizabeth 
calculus2
When the halflife of uranium U232 92 for 74 years . What is the percentage remaining after 10 years ?
asked by drJon 
Economics
In perfectly competitive market,given cost function: C=1/3q35q2+30q+10 and market clearing price be 6,obtain profit maximising level of output
asked by Katelynn 
English
1. My favorite food is noodle. 2. My favorite food is a noodle. 3. My favorite food is noodles. (Which one is right?) 4. My favorite food is ramen. 5. I ate two ramens yesterday. 6. I bought three ramens at a supermarket. (Are they all grammatical? Can we
asked by rfvv 
Geometry
A plane is located at C on the diagram. There are two towers located at A and B. The distance between the towers is 7,600 feet, and the angles of elevation are given. a. Find BC, the distance from Tower 2 to the plane, to the nearest foot. b. Find CD, the
asked by SkatingDJ 
Math
A right rectangular prism is packed with identical cubes. The dimensions of the prism are given in terms of the number of cubes needed to fill the prism. length is 16 cubes wide th is 9 cubes height is 23 cubes. The side length of each cube is 1/4 inch.
asked by Joana 
contempory math
use inductive reasoning to predict the next three number in the patterns 3,4,7,11,18,29
asked by Anonymous 
Algebra 1
Solve the equation by graphing the related function. x^29=0 I have no idea how to do this. Please help!
asked by Nicolette 
math
Find all solutions to the equation tan(t)=1/tan (t) in the interval 0
asked by alicia otto 
Science
determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^4 M HI pH 8.65*10^8 M KOH pH 0.00212M Ca(OH)2 pH
asked by Mattie 
Pre Calculus
The revenue and cost equations for a product are R=x (500.002x) and C= 12x+ 150000. Where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to get a profit of at least 1,650,000
asked by Destiney 
Chemistry
At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?
asked by Anonymous 
Science
Which of the following structures is present in both prokaryotic and eukaryotic cells? A. Golgi apparatus B. Cell membrane C. Endoplasmic reticulum D. Chloroplast I think B
asked by AMGCSTRNBSN 
physics
a handbag weighing 162N is carried by the students each holding the handle of the bag next to him. If each handle is inclined at 60° to the vertical, find the force on each students arm
asked by jay 
calculas
A buoy oscillates in simple harmonic motion y = A cos(ωt) as waves move past it. The buoy moves a total of 2.7 feet (vertically) from its low point to its high point. It returns to its high point every 18 seconds. (a) Write an equation describing the
asked by Sagar 
math
The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths
asked by Chistopher 
math
The coordinates of the vertices of a quadrilateral are given below . (2, 3) (8, 3) (8, 11) (11, 7) What is the area, in square units, of the quadrilateral?
asked by Lakshmi 
Algebra
Two High Schools ordered AP Chemistry text book from the same book store. A New Hampshire school has ordered 80 copies, while a Vermont school ordered only 55 copies. The store has 70 books in its warehouses in Massachusetts and 100 books in the other
asked by Anish Panda 
physics 1
A 3.50 kg ball with a velocity of 10.00 m/s collides with a stationary ball with a mass of 5.00 kg. After the collision, the first ball travels at a 42.6 degree angle from its original path, while the second ball travels at a 26.7 degree angle from the
asked by i 
Chemistry
Under certain conditions, nitrogen gas reacts with oxygen gas to form nitrogen monoxide gas. How many total electrons are transferred for each molecule of nitrogen or oxygen?
asked by Kiana 
Music
Orchestration refers to The use of dynamics
asked by dosvh 
Algebra
A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to
asked by Anish Panda 
calc 2
Use Euler's method with step size 0.5 to compute the approximate yvalues y1, y2, y3 and y4 of the solution of the initialvalue problem y' = y − 3x, y(4) = 0.
asked by TayB 
Chemistry
At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?
asked by Em 
Math
Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (5,1) each vertex of the rectangle is located at a point that has
asked by Emily 
physics
An electron is traveling at 1% the speed of light. what is its kinetic energy in joules? (Speed of light= 3x 10 to the exponent of 8 m/s) a. 4.000 x 1018 (exponent of 18) b. 4.098 x 10 (exponent of 18) c. 4.098 x 10 (exponent of 10) d. 4.000 x 10
asked by pub 
Science
In a certain plant, red flower color(R) is dominant over white(R). if a plant heterozygous for red flower color and one with white flower are crossed, which of the following would be the expected proportion of individual in the next generation? A. 4/4 red
asked by AMGCSTRNBSN 
Science
Which of the following statements best explains the relationship between the mitochondria and the plasma membrane? A. The mitochondria makes proteins that become a part of the plasma membrane. B. The mitochondria makes a gas that the plasma membrane uses.
asked by AMGCSTRNBSN 
Science
An individual suffers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from this injury? A. Heart and lungs B. Liver and stomach C. Brain and spinal cord D. Large and small intestines I think A
asked by AMGCSTRNBSN 
Science
Which of the following tissues would send a message to the brain indicating that someone has touched something hot? A. Epithelial tissue B. Nervous tissue C. Muscle tissue D. Connective tissue I think a
asked by AMGCSTRNBSN 
Science
Which of the following is the pH when the concentrations of hydrogen ions and hydroxide ions in an aqueous solution are equal? A. 14 B. 7 C. 1 D. 0 I think 1
asked by AMGCSTRNBSN 
Statistics
An IQ is measured with scores that range from 0200. The means is 100, the standard deviation is 15. Suppose you choose an SRS of 9. What is the probability that the sample will have an average IQ between 105 and 115?
asked by Jessie 
Science
Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules I think A
asked by AMGCSTRNBSN 
Physics
train moving with speed 72 km h−1 emits a whistle of frequency 600 Hz. A person is standing stationary on the platform. Calculate the frequency heard by the person if the train (i) approaches and (ii) recedes away from the listener.
asked by Komal 
math
A standard deck of has 52 cards, and contains 13 cards of each of the four suits: diamonds, spades, hearts, and clubs. What is the probability that you choose a spade, given that you have already chosen a diamond (and have not replaced it)?
asked by Fallon 
calculas
consider the following. Function y = cos 3x point (pi/4, square root of 2/2) (a) Find an equation of the tangent line to the graph of f at the given point. (Let x be the independent variable and y be the dependent variable.)
asked by Sagar 
mathematicscubic equation
. solve the cubic equation 2x^311x^2+18x8=0 show workings #thanks
asked by P1 
math
A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. (this question is
asked by farahan 
Physics
A pan filled with hot food cools from 94°C to 86°C in 2minutes when the room temperaturs is at 20°C .How long will it take to cool from 71°C to 69°C ?
asked by Eddie 
College Physics
At what temperature is the rootmeansquare speed of nitrogen molecules equal to the rootmeansquare speed of hydrogen molecules at 126 oC? (Hint: The molar mass of hydrogen atoms is 1.008 g/mol and of nitrogen atoms is 14.007 g/mol. The molar mass of H2
asked by Desperate Student 
physics
A force of 80N acts on a body initially at rest and moves 72m in 6s. If the force is removed after 6s calculate how far the body moves after 6s
asked by jay 
Geography
Are the borders of India (suuch as China, Nepal, Bangladesh, and Burma) related to culture (ethnic boundary) or more related towards physical features? I'm not sure how I can tell
asked by Anonymous 
math
At the end of Summer, Puss discovers that his radiator antifreeze solution has dropped below the safe level. If the radiator contains 4 gallons of a 25% antifreeze solution, how many gallons of pure antifreeze must he add to bring it up to a desired 50%
asked by Anonymous 
Chemistry
What is the salt most likely to be formed at the junction of the Fe2+ions and SiO4+
asked by Eliza 
Chemistry
What is the pH of a solution obtained by adding 15 g deK2SO4em 150 ml NaHSO4 with Molarity of 0, 2 m. HSO4 Ka = 1, 3.10^2
asked by Arya 
physics
A 1,500kg car stands on a square platform, and a 25kg boy stands on another square platform. These platforms are the two caps of a large oilfilled container. What must be the ratio of the platform sides (large/small) for the boy to gently lift the car?
asked by Dylan 
physics
Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there between narrow and wide
asked by Morgan 
physics
Two equally long 12cm diameter pipelines have the same pressure difference between ends. One carries a ‘Type A’ oil (𝜂 = 0.091 Pa s) and the other a ‘Type B’ oil (𝜂 = 0.064 Pa s). If ‘Type A’ oil flows at 0.14 m3/s, at
asked by David 
math
find all solution to the equation 3 cos(x+4)=1. in the interval of 0
asked by alicia otto 
English
I have to write a point form outline for a short story... i need to start with a flashblack but not sure how? the topic: Your main character is an easy going 74year old woman. The story begins in a doctors surgery. Your character is determined to get to
asked by Rose 
Simple Geography
The provisions of the United Nations Conference of the Law of the Sea (UNCLOS) give coastal countries navigational and economic sovereignty over which of the following zones? A) 200nauticalmile exclusive economic zone B) Export processing zone (EPZ) C)
asked by Elizabeth 
english
from the passage we learn that these rare species are specifically located in the Okawvango Delta in the north of Botswana. They also disliked by farmers as they are very harmful and could physically injure them eventually these species are shot this is
asked by hello 
Statistics
why using the t statistic may be an appropriate alternative to using a zscore
asked by Ninoska 
math
i am a 3 digit number the sum of my digits is 10 my first digit and my last digit are the same one of my factors is 7 what number am i? A 181 B 262 C 343 D 505 CHOOSE ONLY ONE!!
asked by jennifer 
English
How can you write a great conclusion?
asked by Boberto 
Chemistry
0.573 g of calcium chloride reacts with excess of 0.5 M Na3PO4 to form .523 g of isolated calcium phosphate precipitate. Determine theoretical yield, actual yield, and percent yield for this reaction.
asked by Kiana 
Physics
Particle 1 of mass 3m initially moving with a speed v0 in the positive xdirection collides with particle 2 of mass m moving in the opposite direction with an unknown speed v.After collision,particle 1 moves along the negative ydirection with speed v0/2
asked by Divya 
Engish
Despite brawls caused by drunken fans, it is virtually impossible to eliminate alcohol from baseball stadiums. A major reason is that the key sponsors of baseball games are beer manufacturers such as Coors, Miller, and Busch. This is a Cause and Effect is
asked by jennifer 
Physics
In Europe, the standard voltage is 230 V (rms), AC, and 50 cycles/s. Suppose you take your 5.00 W electric razor to Rome and plug it into the receptacle (with an adapter to fit the receptacle but not to change the voltage). (The standard voltage in the
asked by Alyssa 
English
I need help for Habit 4 Think WinWin summary please help
asked by Anonymous 
PRECALC
4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)
asked by JB 
English
What are the similarities and differences between having 1 vendor and multiple vendors in a school cafeteria.
asked by Anonymous 
Statistics
Use the following information to answer the following questions. IQ is measured with scores that range from 0200. Thea mean is 100 and the standard deviation in the population is 15. What is the probability that a randomly chosen person has an IQ of 115?
asked by Jessie 
Applied Physicd
An object moving with a constant accleration travels distance of 20m and 24m respectively in 3rd and 4th second of its motion. Find the initial velocity and the accleration of an object
asked by Anonymous 
Applied Physics
An object moving with a constant accleration travels distance of 20m and 24m respectively in 3rd and 4th second of its motion. Find the initial velocity and the accleration of an object
asked by Anonymous 
precal
If = 38° and y = 42 cm, what is the value of z to the nearest tenth of a centimeter?
asked by jay 
Physics
The steadystate amplitude of a weakly damped forced oscillator is given by 2 2 2 2 2 2/1 0 0 [( ) 4 ] ( ) ω −ω + ω ω = b f a Depict it as a function of frequency and obtain expression for resonance frequency. Also obtain expression for peak value of
asked by Komal 
Physics
sound wave of frequency 166 Hz travels with a speed 332 ms−1 along positive xaxis in air. Each point of the medium moves up and down through 5.0 mm. Write down the equation of the wave and calculate the (i) wavelength, and (ii) wave number. How far are
asked by Komal 
Physics
The activity of a sample of 31Si (T1/2 = 9.43×103 s) is 7.88×105 decays per second. What is the mass of sample present?
asked by Peter 
Math
66:36::18:?
asked by Sanjay 
Physics help me guys
An aricraft carrier has a mass of 8.6*10^7 kg and can cruise at 80 km/h. a) What is the work required to stop it? B) If only half of the work required to stop it is done, what is its final speed in km/h For a) I found 2.123*10^10 which is the right answer
asked by LEXIMAHO 
Physics
At the start of your throw of a 5.6kg bowling ball, your arm is straight behind you and horizontal (Figure 1) . Your arm is 0.64 m long, has a rotational inertia of 0.48 kg⋅m2 and has a mass of 3.5 kg with its center of mass 0.28 m from your shoulder
asked by Cosmo 
Math
What is the probability of choosing a red or blue gum ball from a bag that contains 14 red, nine blue, and 12 green gumballs.
asked by Gina 
maths
Construct a table of values for 4_
asked by Haisy Omai Gama 
CHEM QUESTION!
I did a lab on the colorimetric determination of iron concentration and I'm not sure how to convert fe conc into ppm. For example, how would i convert 0.6 ug/ml to ppm?
asked by aly 
maths
Construct a table of values for 4_
asked by Haisy Omai Gama 
Math
Ann is x years old and her sister is 2 years older. If the product of their ages 80. Form an equation in x and solve to find the age of each. ______________________________________ I got up to, x + 2x = 80 x + 2x  80 = 0 and now im confused... this is for
asked by Luna 
English
What do you mean by that? What do you mean "lunch is on me"? ===================== There are a lot of meanings of 'by.' What is the meaning of 'by' in the two sentences?
asked by rfvv 
economic
The cost and consequence of providing the subsidies and welfare
asked by innocent 
maths
A Shopkeeper bought a cassette for Rs40 and sold it for Rs55. (a) what was his profit? (b) Express the profit as a percentage of.the cost price.
asked by sonali 
math
A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold
asked by farahan 
English
1. I'm very glad to hear that because I love bulgogi! 2. I'm very glad to hear that because I love Bulgogi!  Do we have to use 'bulgogi' or 'Bulgogi'? (bulgogi:A Korean dish made from sliced beef that has been marinated in soy sauce,
asked by rfvv 
math
An insurance sales representative selects three policies to review.the group of policies he can select from contains eight life policies,five automobile policies and two homeowner's policies.find the probability of selecting: I.all life policies. II.both
asked by farahan 
math
A council consists of 10 members.four are NDC,three are NPP and three are from other parties.if a committee of three is to be selected,find the probabilities following: I.one of each party. II.Two NPP and one from other parties. III.one from other parties
asked by farahan 
physics
the age of jane and john add up to 25years.8years ago jane was twice as old as john.how old are they now?
asked by lucy 
mathematics
the age of jane and john add up to 25years.8years ago jane was twice as old as john.how old are they now?
asked by lucy 
math
Phil is making a number cube out of cardboard . He traces one face of the number cube onto a coordinate grid . The coordinates of two opposite vertices of the face are (4, 8) and (12, 16) . What is the surface area, in square units, of Phil’s entire
asked by Lakshmi 
Math
A bus travels 400 Miles in 8 hours how many miles will the bus travel in 2 days
asked by Kris 
chemistry
Explain using dilution formula how to prepare 0.2M hcl acid from 37% concentrated hcl acid
asked by precious 
Geography
14. Which of the following would NOT be an example of a core country? * Canada Sweden Japan Spain Iceland E?
asked by Anonymous 
College Physics
If a certain amount of ideal gas occupies a volume 9.5 m3 with a pressure of 3.1 atm and temperature 5.4 oC on earth, what would be its volume on another planet, where the temperature is 5.3oC and the pressure is 7.4 atm ? The answer is in unit of m3
asked by Desperate Student 
College Physics
A welder using a tank of volume 1¡Ñ10−2m3 fills it with oxygen (with a molar mass of 32.0g/mol ) at a gauge pressure of 1.4¡Ñ105Pa and temperature of 37.0∘C. Find the initial mass of oxygen. R=8.314m3PaK1mol1. The answer¡¦s unit is g.
asked by Desperate Student 
Physics
A man is 2m50cm standing in front of a vertical mirror at a distance of 3cm,if the mirror is rotated from is initial velocity through and angle of 50degree? 1.determine the size of the image of the man? 2.how far from the man is the image? 3.what is the
asked by Nobility 
physics
why is it cold in winter and hot in summer basing on physics knowledge
asked by lucy 
physics
state or law which explains why a ship can easily sink than overturn?
asked by lucy 
Science
determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^4 M HI pH 8.65*10^8 M KOH pH 0.00212M Ca(OH)2 pH
asked by Mattie 
physics
explain the physics principle why the size of tree stem decreases upwards?
asked by lucy 
physics
explain the physics concept to why a ship sounds when moving in water?
asked by lucy 
Geography
For my project, it asks me to find 4 political maps of India from 1850, 1920, 1947, and 2010. After that, it asks me to write an essay explaining the historical map analysis. How do I do that from political maps?
asked by Anonymous 
Chemistry
Balance the following redox reaction occurring in an acidic solution: ClO4^+Br2=Cl^+BrO3^ I get the two half reactions balanced as: 6e^+(8H^+)+ClO4^=Cl^+4H2O and 6H2O+Br2=2BrO3^+(12H^+)+10e^ Then I multiply the top equation by 5 and the bottom
asked by Carol 
chem
A gas has a pressure of 5.7ATM at 100.0 C what is the pressure at 20.0 C? (assume voulme is unchanged)
asked by olivia 
English
In act IV,Scene 1 of Romeo and Juliet, two days before her scheduled wedding to Paris Juliet tells Friar Lawrence all the things you would rather do than marry Paris. which of the following lines from her monologue foreshadow the outcome of the play? A."O,
asked by GummyBears16