Questions Asked on
December 4, 2012

Math
a merrygoround has a radius of 20 ft has a duration per ride of 15 revolutions. How far does a person travel who rides on the merrygoround? (use 3.14 for pi)
asked by Mitchell 
Chemistry
The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x103 M1s1. What is the initial rate of reaction in a reactor filled
asked by lisa 
Math
Emma receives $7750 and invests it in an account that earns 4% interest compounded continuously. What is the total amount of her investment after 5 years?
asked by Student09 
math
explian in writing how waould you use a number line to round 148 to the nerst ten
asked by amber 
calculus
INTEGRATION BY PARTS... 1) e^5t sin 3t dt 2) xe^3x dx 3) x sec^2 x dx **anybody can help me for this question?
asked by kchik 
Physics
A person exerts a force of 12.0 N on the end of a door 65.0 cm wide. What is the magnitude of the torque (in newtonmeters) if the force is exerted perpendicularly to the door?
asked by Tori 
Physics
A 155 N force is applied to the end of a 40 cm wrench at a angle of 45 degrees to the handle. What is the torque?
asked by Kayla 
Chem
Arrange the different types of forces in order of increasing energy. Covelant, Hydrogen bonding, Ion Dipole, DipoleDipole, Induced Dipole, and Ionic Bonding
asked by Jay 
trigonometry
how do i simplify (secx  cosx) / sinx? i tried splitting the numerator up so that i had (secx / sinx)  (cosx / sinx) and then i changed sec x to 1/ cosx so that i had ((1/cosx)/ sinx)  (cos x / sinx) after that i get stuck
asked by v 
chemistry
For a particular redox reaction NO is oxidized to NO3^– and Cu^2+ is reduced to Cu. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ > NO3^ + Cu^+ help. thanks.
asked by dr. bob rocks 
physics
A box slides down a 33.3 ◦ ramp with an acceleration of 1.07 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coeﬃcient of kinetic friction
asked by Anonymous 
accounting
a firm expects to sell 25000 units of its products at $11.00 p/unit. pretax income is predicted to be $60,000. if the variable cost p/unit are $5.00, total fixed cost must be?
asked by manuel 
accounting
a product sells for $200.00 p/unit and its variable cost p/unit are $130 the fixed cost are $420,000. if the firm wants to earn $35,000 pretax income, how many units must be sold?
asked by manuel 
accounting
management anticipates fixed cost of $72,500 and variable cost equal to 40% of sales. what will pretax income equal if sales are $325,000?
asked by manuel 
Physics
Continuously running exhaust hoods in a university chemistry building keep the inside air pressure slightly lower than outside. A student notices that a 175 N force is necessary to start opening a 1.2 m by 2.3 m door. The door is hinged on one of its 2.3 m
asked by Constance 
Chemistry
Given the following equation: 2CH3CO2H + Ca(OH)2 > Ca(CH3CO2)2 +H2O If you start with 30 ml of a 5% solution of acetic acid, how much of a .1M Ca(OH)2 solution would it take to completely neutralize the acid? I'm not quite sure how to start? Should I
asked by Christie 
maths
E is the midpoint of median AD of the triangle ABC and BE is produced to meet AC at F. Show that AF = 1 1/2 AC
asked by manpreet 
maths
A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the
asked by manpreet 
physics
A thin, light horizontal string is wrapped around the rim of a 4.00kg solid uniform disk that is 30.0 cm in diameter. A box is connected to the right end of the string and moves to the right along the ground horizontally with no friction. The box is
asked by toby 
physics
A 9.0 m uniform beam is hinged to a vertical wall and held horizontally by a 5.0 m cable attached to the wall 4.0 m above the hinge, as shown below. The metal of the cable has test strength of 1.00 KN (kiloNewton), which is the maximum tension magnitude T
asked by toby 
college algebra
Can someone please help me find the xintercepts and yintecepts of this equation. I have the radius, and center but I can't seem to get the intercepts. x^2+y^2=16x18y+145=25 Please show work. Thanks!!
asked by confused 
maths
If ax^2 + bx + c = 0 If a,b,c E R. Find the condition that this equation would have atleast one root in [0,2].
asked by sapna 
physics
A 2.00 kg frictionless block is attached to a horizontal spring as shown. At t = 0, the position x = 0.225 m, and the velocity is 4.25 m/s toward the right in the positive x direction. Position x as a function of t is: x = A*cos(ωt ) , where A is the
asked by toby 
Chem Lab Help
I wanted to know if any one has done the Determination of ASA Content of Tablets Lab Report. I need help doing the post lab questions
asked by Latica 
English  ms. sue
ms. sue in morning you plase take a look at my old post? yesterday?
asked by Mohammad 
math
Three times the reciprocal of a number equals 9 times the reciprocal of 6. Find the number.
asked by David 
math
In 2 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt moves the same quantity of cans the same distance in 6 minutes. If both belts are used, find how long it takes to move the cans
asked by David 
math
A pilot can travel 400 miles with the wind in the same amount of time as 336 miles against the wind. Find the speed of the wind if the pilot's speed in still air is 230 miles per hour.
asked by justin 
math
Supppose two trains leave Holbrook, Arizona, at the same time, traveling in opposite directions. One train travels 10 mph faster than the other. In 3.5 hours, the trains are 322 miles apart. Find the speed of each train.
asked by justin 
math
A jet plane traveling at 500 mph overtakes a propeller plane traveling at 200 mph that had a 2hour head start. How far from the starting point are the plains?
asked by justin 
Algbra
A car dealer will sell you the $16,650 car of your dreams for $3,290 down and payments of $331.97 per month for 48 months. What is the APR? (Round your answer to the nearest tenth of a percent.) I keep getting the wrong answer. I get 26.1
asked by Sarah 
physics
Water falls from a height of 84 m. Assuming that all the energy is converted into heat, the rise in temperature of water will be (4200 J/(kg °C) and g=10 m/s2)?
asked by Salem 
Calculus
integral (4x^23x+2)/(4x^24x+3) dx
asked by Anonymous 
Algbra
Marsha must have surgery and she does not have the $2,700 cash necessary for the operation. Talking to an administrator at the hospital, she finds that it will accept MasterCard, VISA, and Discover credit cards. All of these credit cards have an APR of
asked by Sarah 
Physics
A radio station uses broadcasting at 600 kHz. What is the wavelength of the signals emitted by the station (speed of light c=3×108 m/s)
asked by Salem 
physics
A coalfired electrical generating plant has an efficiency of 38%. The temperature of the steam leaving the boiler is 550 °C. What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 °C)
asked by Salem 
Physics
A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car
asked by Ken 
math
A small block of mass 0.8kg is placed at the top of a 4m plane, when it is released, it take 3.5 seconds to slide to the bottom. Determine the coefficient of friction, stating assumptions made.
asked by Anonymous 
Physics
Aluminum has a resistivity of 2.7*108 Ùm. What would be the resistance of 100 m of aluminum wire with a crosssectional area of 2*104 m2?
asked by Anonymous 
Physics
A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup?
asked by Anonymous 
Physics
A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?
asked by Bill 
Math
Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth).
asked by Debin 
math
Consider G. Thumb, the leading salesperson for the Moe D. Lawn Landscaping Company. Thumb turned in the following summary of clients contacted for the week of October 23–28. Date No. of Clients Oct. 23 11 Oct. 24 8 Oct. 25 11 Oct. 26 15 Oct. 27 11 Oct.
asked by Debin 
maths
Find a30 a20 for the AP a, a+d, a+2d, a+3d........
asked by Meenakshi 
math
Suppose that you must order concrete for a sidewalk that is to be 58 ft by 3 ft to a depth of 6 in. How much concrete is required? (Answer to the nearest 1/2 cubic yard.) my answe is 11.5 and is wrong.ugh
asked by Debin 
physics
A 5kg mass was lifted 365cm, how much work was done against gravity?
asked by Jennifer 
UGLEGON
EXPLAIN WHY NA2CO3 AGAINST HCL TITRATION USING PHENOLPHTHALEIN INDICATOR DOES NOT UNDERGO COMPLETION BUT STOPS AT NAHCO3 STAGE
asked by AMPOFO 
mathsprobability
if a cube of 10 X 10 X 10 is slices into 1 X 1 X 1 cubes and then rearranged as earlier.if the outer most layer of cubes fall, how many cubes fall and how much are left....?
asked by Meenakshi 
maths
A Toy is in the form of a hemisphere surmounted by a right circular cone of the same base radius as that of the hemisphere .If the radius of base of the cone is 21 cm and its volume is 2/3 of the volume of hemisphere calculate the height of cine and
asked by simran 
Math
Please show your solution and how you did it. Thank you so much. 1.If x and y are positive numbers such that x^y=y^x and y =2012x, what is x? 2. What powers of two prime numbers will give a product of 1000...000(this sign > { below the 1000...000 and
asked by Aliza 
math
1/3 * 2 =
asked by Himza 
precalculus
A pilot flies in a straight path for 2 h 30 min. She then makes a course correction, heading 7 degrees to the right of her original course, and flies 3h in the new direction. If she maintains a constant speed of 695 mi/h, how far is she from her starting
asked by amaa 
Organic chemistry
please help me with these what are the functional group(s) in Lexiva (Fosamprenavir Calcium)? i only know that it has an amine group but i'm not sure if there is another group!!! and how can i relate Lexiva to chemistry?(ideas please)
asked by leena 
physics
show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you
asked by rhea 
Plane and Solid Geometry
A piece of wood whose ends are square was cut from a cylindrical piece of wood which was cut from the same pieces of wood whose ends are squares 10 centimeter by 10 centimeter and length 20 centimeter. Find the volume of wood(smallest volume) with the
asked by Jannie Lou 
geometry
a cylinder is inscribed in a rectangular solid with a base length that is 10 inches and width that is 10 inches and a height of 16 inches. what is the radius of the cylinder?
asked by miks 
Language Arts
Which sentence is the gerund used as an appositive? (1 point) Catering is a great way to show off your talent as a cook. The best part of catering is making a special occasion a tasty event. The girl has a new job, catering. Mr. Lane gives all of his time
asked by C0L0RS 
pcc
Explain which of the following aqueous solutions has the strongest iondipole attractions: 0.3 M FeBr3, 0.6 M CaCl2, 0.5 M Ba(NO3)2, 0.2 M (NH4)2SO4, 0.9 M KOH.
asked by Amsterdam 
physics
A uniform rod of length b stands vertically upright on a rough floor and then tips over. What is the rod's angular velocity when it hits the floor?
asked by tanti 
chemistry
which of the structures are impossible ,give the numbers of bonds that various atoms can form? (a)CH3CH3 CH3 (b)CH3CH=CH2CH2CH3 (c)CH3NHCH3 (d)CH3CCl=CCH2CH3 (e)(CH3)3 CHCH(CH3)2 (f)CH3CHO
asked by anie 
maths plse help me..
A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the
asked by sarika 
maths plse help me..
A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts are the same as that of
asked by sarika 
science
the frequency of a source is 20KHz. THE FREQUENCIES OF SOUND WAVE PRODUCED BY IT IN WATER AND AIR WILL BE.
asked by sita 
Calculus
When an electronics store prices a certain brand of stereos at p hundred dollars per set, it is found that q sets will be sold each month, where q2 + 2 p2 = 41. a. Find the elasticity of demand for the stereos using implicit differentiation. b. For a unit
asked by jacob 
Calculus
Consider a manufacturer whose total cost of producing x items is given by c(x)=10000+5x+1/9x^2. a. What is the average cost function A(x)= c(x)/x? b. How many items should the manufacturer produce in order to minimize average cost? c. What is the smallest
asked by joshua 
Arrays and an Expanded Algortim
26 x 22
asked by Mommy 
maths profit and loss
The profit on a certain item is 20%. If the CP is increased by Rs 50 and SP is increased by Rs 30 then the profit 5 reduces by 3 1/3%. Find the original CP and SP.
asked by Meenakshi 
Math
jen and heather went to lunch. When the bill came, Jen discovered that she has only $8.00. Luckily, heather had enough money to pay the other part, or 3/5 of the total bill. How much did Heather Pay?
asked by Anonymous 
geomerty HELP PLEASE!
Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.
asked by Delia 
Physics
If the coefficient of kinetic friction between a 35 kg crate and the floor is 0.30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if μk is zero?
asked by Henry 
Physics
A force of 40 N is required to start a 5 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 40 N force continues, the box accelerates at 0.70 m/s2. What is the
asked by Harry 
HSM/220  HUMAN SERVICES ADMIN: SO YOU WANT TO HEL
in 200 to 300 words, the advantages and disadvantages of each of the following organizational structures: · Departmentalization · Matrix organizations · The project team · The collegial model
asked by domanique 
physical
if there are x,y and z are three piston what is the area of piston y and how much force is exerted in the condition of friction is zero.
asked by Anonymous 
Spanish
What is the difference between a preterite and imperfec.
asked by Roscoe 
physicss
A child sits on a swing supported by ropes of length 3.0 m. With what frequency will she need to apply the driving force to maintain swinging?
asked by jad 
Physics Elena please help!
The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is
asked by Sarah 
physics
The SI unit of energy can be expresses as what?
asked by elaine 
statistics
What is the zscore for a test score of 440 in which the test has a normal distribution of N(400, 50)?
asked by Angie 
strayer
Determine the comparable interest rate for a $50,000 loan when the quoted information is 12.1% + 0.5 pt + $200. (Round your answer to two decimal places.)
asked by deidre 
French
Qu'estce que tu utilises quand il fait chaud? Qu'estce que tu n'utilises pas si tu as froid? Quand il fait froid, qu'estce qu'il y a sur ton lit? Où sont tes livres? Où sont tes vêtements? Qu'estce qu'il y a sur les fenêtres? Où estce que tu te
asked by Roscoe 
maths plse help me..
A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the
asked by swati 
PLEASE HELP geometry trapezoid problem please help
The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid. I don't get it... i got as far as the area is 40, and m (median) times the height is 40 as well... please help!
asked by Knights 
Biology
Hi there, Internal membranes play important roles in protein production and processing except they do NOT a. anchor ribosomes in place. b. transport substances. c. contain the hereditary information for the protein. d. modify proteins to go into vesicles.
asked by Batman 
Math  Please help
The population standard deviation of people who shop online is 3.1. If you want to be 75% confident that the sample mean is within 10% of the population mean, how many people must be surveyed?
asked by Alley 
PreCalc
A box is formed by cutting squares out of the corners of a flat piece of metal, and folding the sides up. What size cuts should I make to a 14in. by 20in. piece to get a volume of 270in cubed?
asked by YKWCH 
Calculus
Find the parametric equations for the line of intersection of the planes x+y+z=3 and xy+2z=2 I took the cross product of the 2 equations and got 3ij2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2t z=2t However, the answers are
asked by Mackenzie 
maths plse help me..
if tangent to the curve y=2sinx +sin2x are drawn at p(x=60degree) then find the area of the quadrilateral formed by the tangent the normal at P and the coordinate axis
asked by Anamika 
math
graph the inequality... y > –5x + 3 I need help to know how to graph this  unsure how and I have to choose between 4 graphs that are shaded....
asked by Deborah 
math
Which ordered pair is a solution of the inequality? y ¡Ý 4x ¨C 5 A(3, 4) B(2, 1) C(3, 0) D(1, 1) I think it is C?
asked by Deborah 
maths Surface area and all that..
A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts are the same as that of
asked by manraj 
Chemistry 3A
the pressure of hydrogen gas in a constant volume cylinder is 4.25atm at 0 degrees celsius. what will the pressure be if the temp. is raised to 80 degress celsius? Also do we have to first convert celsius to kelvin?
asked by Gurjot 
Chemistry 3A
a 325ml sample of air is at 720 torr and 30.0 degrees Celsius. what volume will this gas occupy at 800 torr and 75.0 degrees Celsius.
asked by Gurjot 
Chemistry 3A
a sample of gas occupies 500ml at STP. what volume will the gas occupy at 85.0 degrees Celsius
asked by Gurjot 
Physics
What is the ratio of the wavelength of visible light of wavelength600 nm to that of an FM radio wave of frequency 100 MHz? c = 2.998x 108 m/s
asked by Amy 
Physics
What is the magnitude of the electric field 0.3 m from a 104 C point charge?
asked by Adam 
math
A Caribbean cruise is offered if the average quarterly sales for just the 3rd and 4th quarters is $120,000, what is the 4th quarter? How do you divide two quarters to get the average? Thank you in advance. Edna
asked by Edna 
Science
Which property can be used to help identify an unknown substance? Specific Heat combustion temperature Tyndall effect
asked by Cassie:) 
Trigonometry
Please check if i did right! 2. Choose the point that lies on the curve r = 2 – 3 sin θ. A. (5, 3π/2)
asked by Carlos 
Social Studies 8
The president was pressured to declare war on Great Britain by the....? Barbary pirates. Prophet. War Hawks. Peace Doves. I want to say either Barbary Pirates or Prophet (mostly Prophet), but I honestly have no idea.
asked by L0vleyLayna 
calculus
INTEGRATION USING PARTIAL FRACTIONS a) 4x^23x+2 / x^3x^22x dx b) x^2 / (x+1)(x+1)^2 dx c) 33x / 2x^2+6x dx d) x^2+2x1 / (x^2+1)(x1) dx ##anybody can help me for this question?
asked by kchik 
Science
Hurry!!!!!!!!!!!!!!!!!!!!!!!!!!!! Which of the following is a speed, not a velocity? A. 35 m/s east B. –35 m/s C. 35 m/s D. 35 m/s south
asked by Layla 
Maths
what is 0.1 of 240
asked by HELPME!!!!!!!!! 
Science
A car traveled at an average speed of 60 mph for two hours. How far did it travel? A. 30 miles B. 60 miles C. 120 miles D. 150 miles
asked by Layla 
Trigonometry
QUESTIONS IM STUCK ON 6. Change 4√2  4√2 to trigonometric form A. 32 cis 135° B. 8 cis 225° C. 8 cis 45° D. 32 cis 45° 7. Simplify (2 cis 100°)7. A. 2 cis 700° B. 128 cis 280° C. 128 cis 340° D. 2 cis 340° 9. Simplify 12(cos52° + i
asked by Erick 
physics
A 5.00 kg particle moving along the xaxis at an initial velocity of 4.5 m/s. what is the initial kinetic energy of the particle?
asked by Anonymous 
Math Ms. Sue please help
Graph the inequality... y>5x+3 All it shows is 4 graphs that are shaded  and I have to choose one...they are all dotted..can you help me please...
asked by Deborah 
maths
35% of 20
asked by HELPME!!!!!!!!! 
Physics Please Help me!
The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is
asked by Sarah 
chemistry
Which of the changes will form more CaCO3 (more moles CaCO3)? CO2 + Ca(OH)2=CaCO3 +H2O delta H =113kJ Write and explain if amount CaCO3 decrease, no change or increase with regards to the following situations: a) Increase volume at constant temperature.
asked by Akira 8 
Biostats
What statistical methods a researcher can use to determine if weights of the children in pounds are normally distributed or not?
asked by Mary 
Biostats
What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).
asked by Mary 
social studies
Which of the following is not a response to the Stamp Act?
asked by kid 
math
One pipe fills a storage pool in 20 hours. A second pipe fills the same pool in 15 hours. when a third pipe is added and all three are used to fill the pool , it takes only 6 hours. Find how long it takes the third pipe todo the job.
asked by sam 
English
Hello all. I speak very little of english. My teacher emailed me this and I wan't to make sure I understand correctly. [The final exam will only cover material since the midterm.] this means that final exam will ONLY cover what we learned after midterm??
asked by Shabihi 
math
In 6 hours,an experienced cook prepares enough pies to supply a local restaurant's daily order. Another cook prepares the same number of pies in 7 hours. Together with a third cook, they prepare the pies in 2 hours. Find how long it takes the third cook to
asked by sam 
math
The quotient of a number and 3, minus 1, equals 5/3. Find the number.
asked by sam 
math
Find the numerator for the equivalent fraction. 4/9 = ? / 63
asked by Anonymous 
math
Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the firstvcar is 14 miles per hour
asked by val 
math
find the horizontal asymptote of f(x)= 8x/2x^2+1
asked by azmeena 
maths
there are 8 oranges in a box and 8 kids are waiting to get one. Each kid is given 1 orange, yet there is one orange left in the box, how?
asked by khan 
math
A pilot can fly an MD11 2160 miles with the wind in the same time she can fly 1920 miles against the wind. If the speed of the wind is 30 mph, find the speed of the plane in still air.( Source: Air Transport Association of America)
asked by val 
MATH
Expand f(x)=ln (1+x/1x) in a Taylor Series about x=0. You must express your answer using summation notation. This is what I tried to do So I was thinking of taking the derivative of ln(1+x/1x) and get 2/x^21 And then use the identity 1/1x= sum
asked by A. 
Physics
A 46% efficient device uses chemical energy to generate 570J of electric energy. 1. How much chemical energy is used? 2. A second device uses twice as much energy to generate half as much electric energy. What is its efficiency?
asked by Anonymous 
Physics HELP!
I have NO idea how to do this! any help is great! A car of maass 1330kg is traveling at 28m/s. The driverapplies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it
asked by Maggie 
Physics
A typical photovoltaic cell delivers 4.2×10^−3W of electric energy when illuminated with 0.15W of light energy. What is the efficiency of the cell?
asked by Anonymous 
chemistry
what is the nickel ion concentration in a solution prepared by mixing 337ml of 0.430M nickel nitrate with 387ml of 0.251M sodium hydroxide?
asked by sa 
A train sounds its horn as it approaches an inters
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away. (a) What is the average power generated by the horn?
asked by Anonymous 
7th grade math Ms. Sue please
Sometimes people say, "Give 110% of your effort." Isit possible to get 110%? Is there ever a situation where you might have a percent over 110%? If no, explain why. If yes, Give a scenario where 110% is used. Please help Ms. sue! I have NO IDEA how to
asked by Delilah 
Statistics
I need to know how to find the probability that z0 is greater than or equal to 2.40 using my TI83+. The answer is .008200, but I don't know how to get that using my calculator. The only reason I know the answer is because it is an example from my
asked by Chris 
Physics  Unit Conversion
I am trying to calculate heat transfer between two objects. The units are as follows: mass: grams specific heat: cal/gm degree celsius temperature: degree celcius My numbers aren't working out and I know how to do the problem. So, what's the deal with the
asked by Brenda 
Biology
Hemoglobin is physiologically designed to deliver more Oxygen to exercising tissues than to resting tissues. Discuss three pieces of evidence that support this argument.
asked by Jane 
physics
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away. (a) What is the average power generated by the horn?
asked by Anonymous 
PHYSICS  PLEASE HELP
Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. Each dish in the figure
asked by Anonymous 
Biology
Why are alveoli so numerous (why not just a single large air sac for gas exchange)?
asked by Anonymous 
Chemistry 3A
a quantity of oxygen occupies a volume of 19.2L at STP. How many moles of oxygen are present?
asked by Gurjot 
PHYSICS  PLEASE HELP!!
An "energy bar" contains 19g of carbohydrates. If the energy bar was his only fuel, how far could a 68kg person walk at 5km/hr ?
asked by Anonymous 
Chemistry 3A
A 425mL volume of hydrogen chloride gas, HCL, is collected at 25 degrees Celsius and 720 torr. what volume will it occupy?
asked by Gurjot 
advanced math
find the real solutions. 3+ the square root of (2x+2)=x
asked by kristina 
math
what is 1/7 + 2/4 in simplest form
asked by destiny 
Physics
21) A 46 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of – 1.2 m /s. Her hands are in contact with the wall for 0.8 s. Ignore friction and wind resistance • Find the magnitude
asked by Bill 
math
65 oz= how many lb explain please
asked by alinna 
simple math
how do i write out 17260 million 1,726,000? is that write or 17,260,000
asked by anne 
Physics HW, Please Help
A seasoned mini golfer is trying to make par on a tricky hole #5. The golfer can complete the hole by hitting the ball from the flat section it lays on, up a 45° ramp launching the ball into the hole which is d = 1.60 m away from the end of the ramp. If
asked by Michael 
university physics
A copper sheet of thickness 2.19 mm is bonded to a steel sheet of thickness 1.13 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 25.7°C. a) Determine the temperature (in °C) of the coppersteel
asked by jane 
math
Write 2x^2+6x5 in the form of a(x+h)^2 +k where a,h,k, are real numbers.(using completing the squares)
asked by Lindsay 
social studies
what is the question to usa studies weekly 9
asked by katie 
correlation and regression
the data given below has y = 3x5 for its regression equation. find the standard error of estimate
asked by reta 
university physics
A cryogenic storage container holds liquid helium, which boils at 4.20 K. Suppose a student painted the outer shell of the container black, turning it into a pseudoblackbody, and that the shell has an effective area of 0.615 m2 and is at 3.01·102 K. a)
asked by jane 
math
You have found a summer job manning a lighthouse off the northern coast of Vancouver Island. It is a lonely job and you feel the need for some mental stimulation. In your position, 40 m above sea level, you observe two sailboats in line with the
asked by matt 
math
you have an unfortunate brush with the law and you are required to spend some time in the penitentiary. (Naturally you have brought your math 30 course notes with you for a bit of light bedtime reading. You also hope to enlighten your fellow inmates with
asked by barry 
Physics
A physics student wants to build a spring gun that when aimed horizontally will give a 35.0 g ball an initial acceleration of 'g' by releasing a spring that has been compressed 18.0 cm. What is the velocity of the ball as it emerges from the gun?
asked by Courtney 
Chemistry 3A
what volume would 10.5 g of nitrogen gas, N2, occupy at 200 K and 2.02 atm?
asked by Gurjot 
Chemistry 3A
how do i calculate the density of sulfur dioxide, SO2, at STP.
asked by Gurjot 
Physic
A box with a weight of 22N falls through the air with a wind resistance of 14N, what is the mass of the box and the acceleration of the box?
asked by Mac 
Chemistry 3A
in a lab experiment, 133mL of gas was collected over water at 24 degrees Celsius and 742 torr. Calculate the volume that the dry gas would occupy at STP.
asked by Gurjot 
Science
Write a paragraph explaining why a colorblind man who has three daughters and one son with normal color vision might have two grandsons who are colorblind. Use the terms in the vocabulary box in your answer. Underline each term. genotype recessive
asked by Bobby 
Chemistry 3A
A volume of 122mL of argon, Ar, is collected at 50 degrees Celsius and 758 torr. What does this sample weigh?
asked by Gurjot 
Physics PLEASE HELP
The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is
asked by Sarah 
Math
Diana has 520 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area?
asked by Cathy 
social studies
Despite temperatures of more than 5,000º F, Earth's inner core is solid because of _____________________. a layer of ice just above it. the fact that Earth rotates so quickly. a thickness of over 1,000 miles. great pressure from the layers around it.
asked by Sammy, !!!Please Answer!! 
chemistry
A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei. Magic # of protons: 2,8,20,28,50,82 Magic # of neutrons: 2,8,20,38,50,82,126, 184 Using general trends, predict the stability of
asked by michelle 
Math
I'm doing a bunch of practice finals and I don't know how to approach this problem. Find a vector a such that a is orthogonal to < 1, 5, 2 > and has length equal to 6. If I want to find a vector that is orthogonal to , I must take the cross product?
asked by A. 
Social Studies
What percentage of the world's earthquakes and active volcanoes occur on the "Ring of Fire"? 1) *10% 2) *20% 3) *50% 4) *80% My Answer. Is It Correct? Please Be Honest. #4: 80% The name of Earth's single, huge continent from over 250 million years ago is
asked by !!!!Please Answer Ms.Sue The Real One!!!! 
Math
Given θ = arcsin (tan45°) find the exact degree measure of θ without usiing calculator.
asked by TRIGONOMETRY 
TRIGONOMETRY
Write the following trigonometric expression as an algebraic expression in x free of trigonometric or inverse trigonometric functions sin(cos^1 x) 1≤x≤1
asked by Matthew 
Problem Solving: Writing to Explain
Look at the numbers 13, 15, 19, 25,.... Describe the pattern and how can you find the next tow numbers.
asked by Vershawn 
math
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:
asked by sandy 
Math
A car dealer will sell you the $16,650 car of your dreams for $3,290 down and payments of $331.97 per month for 48 months. What is the APR? (Round your answer to the nearest tenth of a percent.)
asked by Kim 
French
Qu'estce que tu utilises quand il fait chaud? Qu'estce que tu n'utilises pas si tu as froid? Quand il fait froid, qu'estce qu'il y a sur ton lit? Où sont tes livres? Où sont tes vêtements? Qu'estce qu'il y a sur les fenêtres? Où estce que tu te
asked by Roscoe 
math
Find the exanct real number of sec^1√2, w/out calculator.
asked by Yester 
Math
I am a whole number. I am greater than 50. Half of me is less than 30. My digit add up to 9. What number am I?
asked by Leyton 
physics
A coil spring is extended by 4.4 cm when it supports a 1.00 N weight. If an identical spring is joined to the end of the first one, what is the extension of the combined spring when it supports the same 1.00 N weight? Assume the spring masses to be
asked by Courtney 
physics
A long, straight wire lies on a horizontal table and carries a current of 3.05 µA. In a vacuum, a proton moves parallel to the wire (opposite the current) with a constant speed of 3.00 104 m/s at a distance d above the wire. Ignoring the magnetic field
asked by Anonymous 
math
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:
asked by sandy 
Math
Peter has 1200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area?
asked by Jane 
grammar
Franklin Roosevelt said that December 7, 1941, was "A date which will live in infamy."
asked by Earl 
physics
A small child has a wagon with a mass f 10 kilograms (KG). The child pulls on the wagon with a force of 2 newtons (N). What is the acceleration of the wagon?
asked by Bri 
Math
Find all solution of the trigonometric equation 3cosθ√3=0 for θ in degrees.
asked by Daisy 
Math
Find all real solution of the equation sin^2x = 2+2cosx
asked by Daisy 
physics
A bathysphere used for deep sea exploration has a radius of 1.60 m and a mass of 1.20 104 kg. In order to dive, the sphere takes on mass in the form of sea water. Determine the mass the bathysphere must take on so that it can descend at a constant speed of
asked by sjust 
Physics
A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's
asked by Casey 
Physics PLEASE HELP
The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is
asked by Sarah 
Physics
An elevator lifts a total mass of 1.1 x 10^3 kg, a distance of 40 m in 12.5s. How much power does the elevator demonstrate?
asked by Taylor 
Chemistry
The normal boiling point of bromine (Br2) is 58.8°C, and its molar enthalpy of vaporization is ΔHvap = 29.6 kJ/mol. Calculate the value of ΔS when 1.00 mol of Br2(l) is vaporized at 58.8°C.?
asked by Josh G. 
Math could you help this is kinda hard and urgent
The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid. I tried figuring this out... by the way i got median times height is 40 and also notice that we are talking about the diagonals not
asked by Knights 
Science
How are Jupiter and Saturn similar?
asked by Navpreet 
Science
Which planet has the strongest winds in the solar system and the Great Dark Spot?
asked by Navpreet 
Calculus
Find the parametric equations for the line of intersection of the planes x+y+z=3 and xy+2z=2 I took the cross product of the 2 equations and got 3ij2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2t z=2t However, the answers are
asked by Mackenzie 
math
How can i subtract 3/4 by 1/8? Pleae explain answer.
asked by Anonymous 
Chemistry
Why does I2 have a higher boiling point than F2? And why does NH3 have a higher boiling point than PH3?
asked by Jeremy 
trigonmetry
find all solutions for tan^2 theta 4 = 0 i got theta = arctan 2 is that correct? and if it is how would i write it as a solution?
asked by v 
Physics[CONCEPT NO MATH]
F = G(m1 x m2)/(d)^2 If you double the mass of one object and double the distance between the center of the two objects what happens to the force? If you double the mass of each object and double the distance between them what happens to the force?
asked by Michael 
English
Read each phrase. Write the possessive form of each item on the line the barking of the dog the dog's barking the game of my family my family's game the car of my mom my mom's car the office of my aunt my aunt's office the computer of my brother my
asked by Jerald 
english
Is the following question correct? Set the salt and pepper on the table.
asked by mom 
math
a scale model of a car is 10 in long. The actual car is 15 ft long. What is the scale of the model?
asked by boy 
Physics
An elevator and its load have a combined mass of 1550 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 11 m/s, is brought to rest with constant acceleration in a distance of 38 m.
asked by Trent 
Science
Are dwarf planets located in the Kuiper Belt?
asked by Navpreet 
Chemistry
Is the bond in the molecular orbital energy level diagram of Li2 stable?
asked by Jeremy 
chemistry
What is the molarity of a sulfuric acid solution if 30.00mL of H2SO4 is required to neutralize 0.840g of sodium hydrogen carbonate? H2SO4(aq) + NaHCO3(aq) → Na2SO4(aq) + H2O(l)+ CO 2(aq)
asked by shane 
math
Assuming that the temperature has to be below freezing in order for it to snow, if the probability of the temperature being below freezing tomorrow is 85%, and the probability of there being precipitation tomorrow is 25%, what is the probability that it
asked by bob 
Science
What is Pluto mainly composed of?
asked by Navpreet 
Physics
A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 1.9m/s. What is the initial height of the bob?
asked by Enno 
English
Read the sentences Then rewrite each possessive noun correcting its use of the apostrophe Moms' purse is on the hall table Mom's The witnesses's testimony convicted him witnesses' The original solo designers' plans are the best designer's? Two womens'
asked by Jerald 
ALGBRA
Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth).  I've posted this question earlier and I'm still getting
asked by Debin 
Science
What object(s) are located between the orbits of Mars and Jupiter
asked by Navpreet 
5th grade Math
Jessica and her moter return from shopping with 14 pckages. THey park the car in the parking lot, which is 120 meters away from their house. Then they make several trips to bring the packages into their house. Jessica's mother can carry 3 packages at a
asked by Anonymous 
physics
For a helium atom containing two protons, two neutrons and two electrons: A)Calculate the first energy levels(n=1,2,3,4,5)(answers (54.4eV, 6.04eV, 3.4eV, 2.176eV) b)Calculate the frequency in Hz of a proton emitted from n=2 to n=1 (answer 9.86x
asked by chanty 
math
An airplane flew 1500 miles in 2.5 hours. How many kilometers is this per hour
asked by mike 
English
Read each phrase. On the line rewrite the phrase to correct the mistake. Use correct;y a possessive indefinite pronoun or a possessive personal pronoun everyones' share in the prize everyone's my's role in the winnings my each ones part in the success
asked by Jerald 
french
how to make "nous allons en classe pendant le weekend" negative
asked by R 
english
What grammatical structure is the italicized portion of the sentence? Although her personality had not changed at all, Megan looked quite different.
asked by RayRay 
english
What grammatical structure is the italicized portion of the sentence? Although her personality had not changed at all, Megan looked quite different. First part is italicized!
asked by RayRay 
english
Is the following question correct It took a lot of planning, time, and energy to lay the track for the transcontinental railroad.
asked by mom 
english
Is the following sentence correct Lsy your clothes out at night, and you will have a head start in the morning.
asked by mom 
English
Read the sentences Each sentence contains a word group that can be written as a contraction. Write the contractions We are going to the museum on Saturday We're Who is giving the report Who's They will never leave the decision to us They'll He is never
asked by Jerald 
language arts
can some one give me a sentence with idolize.
asked by gigi 
reading
can somebody help me with this homework . i need to make a poem with 6 words it was to rhyme . 1.toil 2.tilled 3.bramble 4.nectar 5.thickets 6.burrows
asked by Gigi 
english
Is this correct The white hen has laid the greatest number of eggs.
asked by mom 
language arts
can some one give me a sentence with the word ingratitude
asked by gigi 
chemistry
For the hydrogen atom where Rh=2.18*10^18 J, the wavelength of the transition from the ground state to the n=3 state is_____?
asked by chironjit 
Science
What objects are located between the orbits of Mars And Jupiter? :I
asked by Navpreet 
english
Is this correct Having laid on the riverbank all day, the young vacationers missed their meals.
asked by mom 
science
Assume that the hereditary information carried in genes and DNA is responsible many differences observed in humans and other living things. How could just four different bases in DNA strands be responsible for the almost endless variety found in nature?
asked by tammy 
Math
Please help i really need help!! Celine wants to know the width of the pond. She drew the diagram shown below and labeled it with the measurements she made. How wide is the pond? thnx!! :)
asked by Anonymous 
Science
In one or two sentences, summarize what happens during each of the two stages of cellular respiration?
asked by Anonymous 
Economics
PROBLEM SOLVING 1: "ANDREA'S SOFTWARE BUSINESS" I. Complete the following table: DO THE MATH Data Number of Programs Total Fixed Costs Total Variable Costs Total Costs Marginal Costs Average Fixed Costs Average Variable Costs Average Total Costs 0 $60 $0
asked by Timithy 
chemistry
12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the
asked by Jo 
math
an observer in a lighthouse 300 ft above sea level observes 2 ships directly offshore. The angles of depression to the ships are 3 degrees and 4.5 degrees. How far apart are the two ships?
asked by Anonymous 
Geometry
Forest rangers use degree measure to identify directions and locate critical spots such as fires. A forest ranger at tower A observes smoke at a bearing of 149 degrees (clockwise from the north) while another forest ranger at tower B observes the same
asked by Libby 
english
his expression showed how highly he valued his own opinions and scored the view of the others. smug?
asked by ashleigh 
Basic Engineering2. Materials Science
Boron is used to dope 1 kg of germanium (Ge). How much boron (B) is required to establish a charge carrier density of 3.091e7/cm^3. One mole of germanium has a volume of 13.57 cm^3 and weighs 72.61 gram. Give answer in grams of boron? I have no idea how to
asked by Ray 
Lit
Southern Road by Sterling Brown What do you think Sterling Brown means when he mentions the chain gang?
asked by Emi 
mathurgent please help
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:
asked by barry 
2 Math Questions?
1. Paul collects baseball cards. He has 10 outfielders, 7 pitchers, 3 managers, and 5 infielders. If he grabs a card at random, what is the probability that he will grab an outfielder card? a. 144 b. 216 c. 8 d. 72 2. If Hank flips one coin and rolls two
asked by Shaquandala B. 
math
What is 1 1/2 x 3?
asked by Anonymous 
Math
The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and
asked by alice 
math
Mrs. Black has one begonia plant. If she buys two begonia plants each year for every one she has, how many will she have in four years? Please explain the answer.
asked by Anonymous 
PHYSICS URGENT! PLEASE FRICTION CASE 2
A 13 kg box is at rest on a level floor. The coefficient of static friction µS = 0.9 and the coefficient of kinetic friction µK = 0.8. Audrey is applying a 140 N push at an angle (=20°) as shown in Figure 1. C) What is the magnitude of FNormal on box
asked by Sophia 
Math 5th grade
9K=414
asked by Ishu 
Algebra
Do anyone know what the domain and vertical asymptote is for: f(x)=4 ln(x)
asked by sandy 
mathurgent
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:
asked by sandy 
Physics PLEASE HELP
The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is
asked by Sarah 
Algebra
Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.
asked by sandy 
algebra
a large group of students want to go to the movies. if the students take 3 vans and 1 car they can transport 22 people. if they take 2 vans and 4 cars. they can transport 28 people.write and solve a system of equations to find the number of people that can
asked by kayla 
Science
In one or two sentences, summarize what happens during each of the two stages of cellular respiration?
asked by Anonymous 
English
For english class, I have to read a biography/autobiography of an author and then read two of the author's books that have been influenced by their real life. I chose F. Scott Fitzgerald as my author. I want to read The Great Gatsby as one of the books,
asked by Ceci 
Physics
A race car travels 110 m/s around a circular track of radius 197 m. The track is banked at 22 degrees from the horizontal with a friction constant of 0.14. What is the magnitude of the resultant force on the 2800 kg driver and his car of the car does not
asked by Tim 
Algebra
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 4. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single,
asked by Lost!! 
math
what is 3/5 divided by 3/2
asked by Anonymous 
Physics
Dry ice is frozen carbon dioxide. If you have 1.4kg of dry ice, what volume will it occupy if you heat it enough to turn it into a gas at a temperature of 20 degrees Celsius? (answer is in m^3)
asked by Anonymous 
math
What is the range of this data? 17,23,5,13,12
asked by Anonymous 
math
a pitcher throws a baseball has a mass of 0.15kg. If the momentum of the ball is 5.9kg m/s what is the balls speed?
asked by Anonymous 
Fractions
What if u have 71/10 and u have to Chang that in to a mixed number
asked by Joe 
Geometry
if EF = 2x + 7 and GH = 5x + 1, What is EF?
asked by Anonymous 
Math
Danny invested$5,000 into his savings account for college when he was 13 years old. If the account earns 2.5% interest every year, how much interest will danny have earned on his investment and how much money will danny have for college by the time that he
asked by Mackenna 
Programming
Create a program that determine the shipping cost for an order based on the following table: From $0.00 $20.00 $50.00 $75.00 To $19.99 $49.99 $79.99 $1000.00 Price $2.95 $3.95 $4.95 Free
asked by Anonymous 
Stat
What particular measure of correlation would be most appropriate for use with two variables measured at an ordinallevel?
asked by Rolando 
math
On Wednesday, the low temperature was 56derees F and the high temperature was 72.What is the difference between the two temperature?
asked by marthin 
math VERY URGENT
Mrs. Black has one begonia plant. If she buys two begonia plants each year for every one she has, how many will she have in four years? Please explain the answer.
asked by Anonymous 
history
1. How did the ‘ruling class’ change after the American Revolution? 2. How did the ‘ruling class’ change after the Haitian Revolution? 3. How did the ‘ruling class’ change after the French Revolution?
asked by lauren 
Algebra
Evaluate (4p+q)raised to the second for p=5 and q=4. Express the answer as a fraction.
asked by tmouery 
math
The final exam is worth 250 points. How many points do yu need on the exam to earn 93% of the total points ? What percent do yu need on the final?
asked by annonymous 
math
On three tests you earned grades of 88%,94% and 90%. Each test was worth 150 points. The final exam is worth 250 pts. How many pts do you need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?
asked by annonymous 
Algebra
Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.
asked by sandy 
English  ms. sue
thanks ms. sue for help with questions witht that story but i still need some help with few questions. it ask why the story be written in present tense? and is it good choice made by writer?
asked by Mohammad 
Alegebra 1
(1,3) (3,5)
asked by Christian 
Math
Ben has 8 1/2. Pizzas to serve. How many pizza 1/4 pizza sized serving does he have??
asked by Sofia 
Chemistry?HELP
Is carbon graphite or a diamond harder to break or scratch and why. You must use an explanation of molecular geometry, intermolecular and intramolecular forces to answer this question. I'm confused...
asked by Lisa 
math
â€¢You and three (3) of your friends were in the same advance placement high school chemistry class in high school. All four (4) of you decided to take the same chemistry class together at the local university along with 21 other students. On the first
asked by jacque 
chemistry
what is the most soluble salt of the following set? a) AgCN with Ksp=6.0 x 10^17 b) Al(OH)3 with Ksp = 1.9x10^33 c) Fe(OH)3 with Ksp = 2.6 x 10^39 d) Sn(OH)2 with Ksp = 1.6 x 10^19
asked by ashley 
calculus
find the distance d (P_1 & P_2) between points P_1 and P_1. P_1=(3,3) P_2=(1,5) Find the midpoint of the line segment joining the points P_1 and P_2. P_1=(1,1) P_2=(3,3) Please show all work
asked by spazed out 
calculus
The midppoint of the line segment from P_1 to P_2 is (5,4). If P_1=(2,2), what is P_2? For the given equation list the intercepts and test for symmetry. 49x^2+y^2=49 Please show work
asked by spazed out 
chemistry
for the reaction 3C2H2=> C6H6 at 25 C, the standard enthalpy change is 631 KJ and the standard entropy change is 430 J/K. calculate the standard free energy change at 25 C. show all work!
asked by ashley 
Programming Languages (Computer Logic and Design)
Create a program that determine the shipping cost for an order based on the following table: From $0.00 $20.00 $50.00 $75.00 To $19.99 $49.99 $79.99 $1000.00 Price $2.95 $3.95 $4.95 Free
asked by Anonymous 
Physics
Determine the fuel needed to safely land a spacecraft. Start at y = 100km. Landing is y = 0km. Vy < 25 m/sec is a safe landing speed. g = 1.354 m/s^2 Acceleration due to thrust (where fuel used is 100 kgs*Aythrust Amax = 30 m/s^2 Amin = 5 m/s^2 What I
asked by Mike 
Physics Please Help, soooo lost!
Two pipes of equal length are each open at one end. Each has a fundamental frequency of 715 Hz at 300 K. In one pipe the air temperature is increased to 313 K. If the two pipes are sounded together, what beat frequency results?
asked by Mary 
math
on 3 tests you earned grades of 88%,94%,and 90%. Each test was worth 150points. The final exam is worth 250 points. How many points do u need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?
asked by Brandon 
Physics URGENT!!!
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 59 dB by an observer 14 km away. (a) What (b) What intensity level of the horns sound is observed by someone waiting at an intersection 46 m from the train?
asked by Tia 
chemistry
How do I determine the mass (in g) of a sucrose solution that contains 12g of sucrose and is 4.1% sucrose by mass?
asked by What? 
Chemistry
How do I solve the following: 500ml .4M aluminum nitrate solution contains ______moles of aluminum ions and _______moles of nitrate ions. I am helping my fiance and we don't know how to calculate this.
asked by Abram 
calculus
Plot the points and determine the slope of the line containing them. (7,4)(8,4)
asked by Heather 
calculus
If (a,12) is a point on the graph of y=x^2+7x, what is a? please show work
asked by Heather 
calculus
find an equation for the line with the given properties. express the equation in slopeintercept form. containing the pointsP=(1,1)& Q= (1,2) What is the equation of the line? y= Find the the equation of a line that is perpendicular to the line y=1/2x+4
asked by spazed out 
dynamics of rigid bodies
prove that the weight of an object on the moon is approximately onesixth of its weight on earth
asked by Anonymous 
Math HELP!
1. Paul collects baseball cards. He has 10 outfielders, 7 pitchers, 3 managers, and 5 infielders. If he grabs a card at random, what is the probability that he will grab an outfielder card? a. 144 b. 216 c. 8 d. 72 2. If Hank flips one coin and rolls two
asked by JJ. 
Marine Park.
How many ML of fruit juice are in a 1/2 liter bottle
asked by Aaliyah 
chemistry
When relatively small amounts of magnesium burn, the fires are extinguished using commercially available dry powder. a)Why might this fire rekindle days later as someone tries to remove the residue with water? b)What chemical process is involved here?
asked by Cameron 
Math
Jordan starts at his home and bikes along a country road. He bikes at a constant speed. Twenty minutes later he passes Stephanie's house; he knows he is 2 kilometers away from his home. Another one of his friends, Jacob lives 4 kilometers further down the
asked by Jessica 
math
funtion table input output 1 1 2 2 3 4 4 9 5 25 6 7 8 9
asked by dn 
Marine Park.
How many liters of Rainbow Juice can be made with 600 milliliters of fruit juice?
asked by Aaliyah 
Math
I am divisible by four factors in addition to 1 and myself. I am 7 less than a number with a square array. I am less than 24. Which number am I?
asked by Joshua 
Math
I am a perfect square that is 11 more than a perfect square and 13 less than a perfect square. Which number am I?
asked by Joshua 
physics
A 2.40 kg block is in equilibrium on an incline of 36.3 degrees. The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N
asked by Anonymous 
Math
If you count backward from me to divide me by 8, the sixth number you reach is 48. Which number am I?
asked by Joshua 
Math
One of my factors is 5 more than another of my factors. My digits add up to 6. I am less than 50. Which number am I?
asked by Joshua 
Math
When you add the number of rows in my array to the number in each row, you get 15. My digits add up to 9. Which number am I?
asked by Joshua 
Math
The difference between my digits is 7. When you divide me by the sum of my digits, the quotient is the sum of my digits. That makes me a perfect you know what! Which number am I?
asked by Joshua 
chemistry
How do I calculate the freezing point of 11.3g FeCl3 in 155g water? I know how to calculate i and m but how do you find Kf?
asked by Farah Massardi 
Math
What does the line 4x + 3y = 7 look like? horizontal vertical slanted right upwards slanted right downwards
asked by Jaslene 
Physics
A plant hangs from a 1.9 cm diameter suction cup affixed to a smooth horizontal surface (there's a figure but it's pretty simple, a plant in a plant pot hanging from a couple wires, but what seems to matter is the suction cup part). (a) What is the maximum
asked by Brian 
Social Studies
what is one freedom that American democracy has today that was clearly not recognized in the Roman Empire
asked by Dalton 
Math
What is the slope of the line y = 2x + 1 ?
asked by Jaslene 
Physics
A rock dropped into a pond produces a wave that takes 14.6 s to reach the opposite shore,21.1 m away. The distance between consecutive crests of the wave is 5.3 m. What is the frequency of the wave?
asked by Priscilla 
Math
What does the line y = 3x  3 look like? horizontal vertical slanted right upwards slanted right downwards
asked by Estella 
Algebra
Write a linear equation to model the situation. You borrow $70 from your brother. To repay the loan, you pay $7 per week.
asked by Ann 
hsm
How do you adapt your communication approach from one individual to the next
asked by karen 
algebraNOW PLEASE
A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. What is the boat's speed in still water?
asked by Alex 
algebra2
how do you find out the vertex when graphing inequalities of quadratics in equations like this y
asked by jake 
College Algebra
Solve the logarithmic equation for x. log(base 3)(x+6)  log(base 3)(x+1)=1 urgent! help!
asked by Patrick:) 
Civ/Hum
How is Modernity reflected in the movie Metropolis
asked by Michele 
chemisty
12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the
asked by Jo 
math
Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the first car is 14 miles per hour
asked by val 
Algebra URGENT
Write an equation that is in slopintercept form of the line that passes through the points: (1/2, 1) and (3, 5/2).
asked by Ann 
Chemistry105
1. (a) What is the molarity of a solution prepared by dissolving 4.315 g of NaOH in water to exactly 100 mL in a graduated flask? (Na = 23.0; O = 16.0' H = 1.0 amu). (b) What volume of the above solution is required to neutralize exactly 25.00
asked by Mira 
ib english
I need help writing an essay on the hysteria and how it relates to the red scare communism hysteria.
asked by jimmy 
debate
why would a capitalist society, in general, cause war?
asked by Samantha 
Algebra URGENT
Write an equation of a line perpendicular to y=2x+3 and passes through (3,4).
asked by Ann 
physics
Your friend says his remote control car travels at a velocity of 1.5 m/s. What is wrong with that statement
asked by jai 
Chemistry
Under constant pressure, a small basketball pump is filled with helium, He, gas; the helium is then forced out of a small aperture in 2 seconds. The same pump is filled with hydrogen bromide, HBr, gas. Under the same pressure, how long will it take to
asked by Kitty 
Math
Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth).  I've posted this question earlier and I'm still getting
asked by Debin 
precalculus
how do i change this into a standard ellipse equation 2x^2 + y^2= 3 , like i know i divide both side by 16 and get (2/3)x^2 +y^2 / 3= 1 but i don't know what to do with that 2/3 in front of the x
asked by v 
Science
A garden contains 20 different species of plants. Five of these plants are ferns. What percent of the garden is made up of ferns?
asked by Gio 
Science
How can I compare the terms rotation and revolution by creating a Venn diagram? How does the diagram look like?
asked by Louise 
math
Suppose a 60,000 martgage is to be amortized at 7.5% interest. Find the total amount of interest that would be paid for each term a) 10 years b) 30 years.
asked by Andrzej 
Chemistry
7.40 g of liquid methanol, CH3OH, are placed in an empty 20.0 L container at 45.0°C. What will be the pressure in the container when equilibrium is established? Assume the temperature remains constant and the volume of any liquid is negligible. The vapor
asked by Mark 
science
Which example describes a method of relative dating? A. using fossils to determine the oldest rock layer in a canyon B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. examining historical records to
asked by dominique 
Algebra
A car rental company charges $24 per day plus $0.75 per mile driven. a) Let C = total cost; D = number of days and M = number of miles b) Write the equation for the total cost in terms of C, D and M c) Use the equation to determine the total cost for a
asked by Randy 
Calculus
A trough is triangular in cross section, an isosceles triangle with sides of 12 inches, and a top of 10 inches. The trough is 40 inches long. How fast is the depth changing if you are pumping one cubic foot per minute into the trough? I am having a hard
asked by Reggie 
Calculus
I can do the Ferris Wheel type. This one I can not solve. A light is attached to a 13 inch radius bicycle tire, at a point 8 inches from the center. If Harvey rides the bike at 15 mph, how fast is the light moving up and down at its fastest?
asked by Reggie 
English  ms. sue
ms. sue i want to be clear on two more questions. about this man sitting on the step with suitcase, that be because he be leaving somewhere, but i not get why he be mentioned? to escape from bad neighbourhood? also i not get what recrimination mean. to
asked by Mohammad 
Physics
A 0.8 m diameter tank is filled with water to a depth of 2.2 m and is open to the atmosphere at the top. The water drains through a 1.0 cm diameter pipe at the bottom; that pipe then joins a 1.5 cm diameter pipe open to the atmosphere, as shown in Fig.
asked by Drake 
Math
Find the amount of interest and the monthly payment for the loan. Purchase a living room set for $3,600 at 12% addon interest for 2 years. (Round your monthly payment to the nearest cent.) $_____ interest $_____ per month
asked by Ms Jackie 
math
Refer to the following list of closing costs for purchase of a $ 175,000 house requiring a 20% down payment and find each requested amount. Title insurance premium $ 240 Document recording fee 30 Loan fee ( two points) ….. Appraisal fee 225 Prorated
asked by Andrzej 
Chemistry  Photons
Water is exposed to infrared radiation of wavelength 2.5×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.5 g of water by 2.5 K?  I tried
asked by Amy 
Math (trigonometric identities)
I was given 21 questions for homework and I can't get the last few no matter how hard and how many times I try. 17. Sinx1/sinx+1 = cos^2x/(sinx+1)^2 18. Sin^4x + 2sin^2xcos^2x + cos^4x = 1 19. 4/cos^2x  5 = 4tan^2x  1 20. Cosx  sinx  cos^3x/Cosx =
asked by Kim 
math
If the diameter of a circle is half of a yard then its radius is how many inches?
asked by noah 
Chemistry  Lewis Dots
Draw the molecule by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electrons. H3COCH3 Draw the ion by placing atoms on the grid and connecting them with bonds. Do
asked by Amy 
Chemistry
The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x103 M1s1. What is the initial rate of reaction in a reactor filled
asked by Help 
Please HELP Calculus
set up an integral to find the volume of an equilateral tetrahedron.
asked by Amy 
math
Suppose a 60,000 martgage is to be amortized at 7.5% interest. Find the total amount of interest that would be paid for each term a) 10 years b) 30 years
asked by Andrzej 
math
solve each inequalitiy y+ (5) > 6
asked by kyle 
Chemistry Lab
I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please
asked by Terry 
Math
60 tried out for the play 0.7 were chosen what fraction were not chosen ?
asked by Anonymous 
mathsgeometry
how can we prove that parallelogram has parallel sides??
asked by Anamika 
maths  binomial theorem
Write and proof binomial theorem for rational indices?
asked by simmi 
college chemistry
what is the specific heat of a substance that required 800 joules of heat to raise the temperature of 50 grams of it from 20 degrees Celsius to 30 degrees Celsius?
asked by airy 
algebra
Completely factor the following expressions. Please show work/explain t^2+4tv+4v2 4x^28x12+6x 1449p^2 5c^224cd5d^2 w^217w+42 256z^24192z^2+3 2a^2c^314bc^3+32c^3d^2 35g^2+6g9 3j^351j^2+210j
asked by Amanda 
5th grade math
Jason ate lunch at Virginia’s Diner. If his meal cost him $11.00, and he wants to leave Virginia a 15% tip, how much money should Jason leave for the total bill? A. $11.50 B. $12.00 C. $12.36 D. $12.50 E. $12.65 how do you do this?
asked by lisa 
math
convert 50 miles per hour in feetvper second(round to the nearest whole.)
asked by justin 
Trig
cos x cot = csc  sin
asked by Alycia 
Chemistry
In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the
asked by Ashley 
Chemistry
In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the
asked by Ashley 
math 6th grade
what does y=x
asked by sally 
psychology
what is the study called where the same people are tested repeatedly at different ages?
asked by chris 
Chemistry 2
How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl2 for 60.0 minutes. Show all work. Please help!
asked by Ashley 
math
Refer to the following list of closing costs for purchase of a $ 175,000 house requiring a 20% down payment and find each requested amount. Title insurance premium $ 240 Document recording fee 30 Loan fee ( two points) ….. Appraisal fee 225 Prorated
asked by Andrzej 
mathsprobability
A person writes letter to 6 friends and addresses the corresponding envelopes. In how many ways the letter be placed in envelops so that (i) Atleast 2 of them are in wrong envelop (ii) All the letters are in wrong envelop
asked by suheil