Questions Asked on
May 30, 2013

Math
What type of conic section is given by the equation 4x^2+9y^2=36? What are its domain and range?
asked by Tim 
English
What advice do you think the poet would give to the grieving Margaret in “Spring and Fall”? To a young child Margaret, are you grieving Over Goldengrove unleaving? Leaves, like the things of man, you With your fresh thoughts care for, can you? Ah! as
asked by Lyla 
chemistry
2.The data in the table show the amount of a 500 g sample of sodium24 over time. Make a graph of the data (remember to label all axes and title the graph). What is the halflife of sodium24? Explain how you determined your answer. Sodium24 decays by
asked by holly 
geometry
the surface areas of two similar solids are 340 yd2 and 1158 yd2 the volume of the larger solids is 1712 yd3 what is the volume of the smaller solid?
asked by bob 
chemistry
Describe what happens in a fission reaction. What is a commonly used isotope in a nuclear fission reactor? Describe how a fission nuclear reactor power plant works.
asked by holly 
Math
Statistics show that the sales force of Golden Wholesalers successfully closed 1,711 sales out of 1,950 sales calls. What was their percent success rate?
asked by April 
Math help!
A bag contains 9 blue marbles and 1 green marble. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble? Is the answer 1/9?
asked by Jacob 
university of the south pacific
at high noon, the sun delivers 1000w to each square meter of a blacktop road.if the hot asphalt transfers energy only by radiation, what is it's steadystate temperature?
asked by amelia 
Physics
the car has wheels of radius 0.3 m and is travelling at a speed of 36 m/s in a straight line and the wheel now describes 40 revolution while the car is brought to rest; calculate the wheels angular acceleration.
asked by Circular motion 
Chemistry
Calcium oxide can be prepared by heating calcium metal in oxygen according to the reaction: 2Ca+ O(2) > 2CaO. How many grams of calcium would be needed to produce 15.0 grams of calcium oxide?
asked by Anonymous 
CHEMISTRY
Suppose you are studying coordination compounds of Co(II) with the ligand pyridine (py, C5H5N, molar mass=79.10). You isolate a crystalline compound, and because the only available anions are Cl and NO3, you hypothesize that the empirical formula of the
asked by PreMed33 
Math
Jimmy has finished pouring 900 cubic feet out of a total of 4,400 cubic feet of concrete. What percent of the job has she completed?
asked by April 
psychology
You deprive your sixyearold of dessert each time he fails to eat his spinach. In this sort of _______, you weaken a response through taking away something pleasant or desire
asked by Anonymous 
math
A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c)
asked by Nora 2 
FSE 120
A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to
asked by Dave 
math
Suppose a box of marbles contains equal numbers of red marbles and yellow marbles but twice as many green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilities to the elements in the sample space. (Give your
asked by Nora 4 
geometry
Xenia is ordering a cake for her friend’s wedding. She knows that there will be 110 guests at the wedding, and she is trying to decide how large a cake to order. She has been told that each guest should get a piece of cake that is 4 inches by 4 inches.
asked by jay 
Science :check my answers
Here are some questions I had for hw, I answered some of them, can someone check my answers and help me with the ones i didn't answer, thanks: 1.Which constellations are visible from Canada in all seasons? My Answer:Ursa Major, Ursa Minor, Lynx,Cephus,
asked by Ally 
Physics
At what speed must a 950 kg subcompact car be moving to have the same kinetic energy as a 3.2*10^4 kg truck going 20 km/h ?
asked by Jenny 
math
The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?
asked by Beth 
chemistry
Silver will spontaneously reduce which of the following? Reaction E (volts) Na+ + e > Na 2.71 Co2+ + 2e > Co 0.28 Ag+ + e > Ag .80 A) Na B) Co2+ C) Na+ D)Co E) None of these
asked by sciencegeek 
math
You are the buyer for The Shoe Outlet. You are looking for a line of men’s shoes to retail for $79.95. If your objective is a 55% markup based on selling price, what is the most that you can pay for the shoes and still get the desired markup?
asked by tisha 
chemistry
Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.
asked by holly 
business math please help me
An invoice is dated August 29 with terms of 4/15 EOM. What is the discount date? (Points What is the net date for the scenario in the previous question? (Points : 2.5)
asked by April 
physics
if the shortest lenggth of the tube for resonance is 0.1m and next resonance length is 0.35m what is the frequency of the vibration
asked by kelvin 
chemist geniuses
3. Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.
asked by holly 
circuits
If a series RLC circuit has R = 25 ohm, XL = 50 ohms, and XC = 30 ohms, what will be the total impedance?
asked by Adam 
chemistry
A gaseous mixture containing 6 moles of oxygen, 8 moles of helium and 6 moles of carbon dioxide in a container under a pressure of 40 atm. Calculate the partial pressure of th3 individual gases.?
asked by sagar 
Physics
How much work does it take to stretch the spring from 10 cm to 20 cm from equilibrium?
asked by Jennifer 
Math
If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)
asked by Nora 
Physics
A 55 kg skateboarder comes over the top of a hill at 5.0 m/s and reaches 11 m/s at the bottom. Find the total work done on the skateboarder between the top and bottom of the hill.
asked by Darius 
math
Epicure Market prepares fresh gourmet entrees each day. On Wednesday, 80 baked chicken dinners were made at a cost of $3.50 each. A 10% spoilage rate is anticipated. At what price should the dinners be sold to achieve a 60% markup based on selling price
asked by Beth 
Math
Popeyes the parrot sings five different notes, F,C,D, Eflat and G. Write 10 different tunes that he can sing. Each tune must be six notes long and include all five notes Please help me
asked by Anonymous 
English 8R  HW CHECK (PLZZZ READ!)
Please read my essay to see if it's good. PLEASE LET ME KNOW IF THERE ANY OTHER DETAILS I COULD ADD! I REALLY want to get a good grade for assignment and this is my FINAL GRADE! Should the story of Anne Frank and the Holocaust be taught in Middle School?
asked by Laruen 
math
A. Epicure Market prepares fresh gourmet entrees each day. On Wednesday, 80 baked chicken dinners were made at a cost of $3.50 each. A 10% spoilage rate is anticipated. At what price should the dinners be sold to achieve a 60% markup based on selling
asked by Lamar 
once again math
Seriously please help me Popeye the parrot sings five different notes, F,C,D, Eflat and G. Write 10 different tunes that he can sing. Each tune must be six notes long and include all five notes.
asked by Anonymous 
CHEMISTRY
Chromium plating is done using a dichromate solution. How long would it take to plate 1.0x102mm thick onto a car bumper with surface area 0.25m^2 in a 25.0 Amp electrolytic cell? (density of chromium is 7.19g/cm^3)
asked by PreMed33 
Math (Functions)
A large company has a phone tree to contact its employees in case of an emergency factory shutdown. Each of the five senior managers calls three eployees, who calls three other employees and so on. If the tree consists of seven levels, how many employees
asked by Ritu 
Physics
Find the scalar product of the vectors ai+bj and biaj . Where a and b are arbitrary constants. What's the angle between the two vectors?
asked by Jacob 
math
the length of a rectangle is equal to triple the width. which system of equations can be used to find the dimensions of the rectangle if the perimeter is 85 centimeters?
asked by Anonymous 
math
State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the following statements. (a) The linear correlation coefficient is positive. Ho: ñ Select not equal to equal to greater than less than 0 Ha: ñ
asked by Sue 12 
math
Epicure Market prepares fresh gourmet entrees each day. On Wednesday, 80 baked chicken dinners were made at a cost of $3.50 each. A 10% spoilage rate is anticipated. At what price should the dinners be sold to achieve a 60% markup based on selling price?
asked by sharon 
CHEMISTRY
The following data were obtained when a Ca2+ ion selective electrode was immersed in a series of standard solutions. Ca2+ (M) 3.38E5 3.38E3 3.38E1 E(mV) 74.8 18.7 37.7 Calculate the concentration of a sample that gave a reading of 22.5 mV
asked by PreMed33 
Math
Solve the Equations 142=587x 2x+96=443x 26=7x+4(2x4) 7x+5(4x4)=124 7x35=28 10x+36=1082x
asked by Diamond 
math
The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost
asked by stacy 
marketing
The marketing manager at Massimino & McCarthy, a chain of retail stores that sells men's clothing, is reviewing marketing research data to try to determine if changes in marketing strategy are needed. Which of the following sources of data would be a
asked by rick 
Physics
Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball in Pa when
asked by Mathslover 
Physics**Scientist
Please help me with this!! I really can't find it. 1) This scientist used his device by dropped a spool of wire through a magnetic field. 2)This scientist used a torsional balance to show that the magnetic repulsion between magnetic poles varied by the
asked by Isis 
Math (Functions)
A large company has a phone tree to contact its employees in case of an emergency factory shutdown. Each of the five senior managers calls three eployees, who calls three other employees and so on. If the tree consists of seven levels, how many employees
asked by Ritu 
math
At The Luminary, the markup on a halogen light fixture is 50% based on selling price. What is the corresponding percent markup based on cost?
asked by stacy 
Physics
A fuel has heat of combustion equal to 30 kJ / g. How much energy is released when 5 kilograms are oxidized?
asked by Pete 
math
Find P(B). (Give your answer correct to two decimal places.) A and B are independent events, P(A) = 0.59 and P(A and B) = 0.25
asked by Nora 4 
math
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (a) Construct a scatter diagram of the given bivariate data. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Calculate
asked by Sue 12 
physics
A juggler traveling in a train on level track throws a ball straight up, relative to the train, with a speed of 5.75 m/s. The train has a velocity of 19 m/s due east. (a) As observed by the juggler, what is the ball's total time of flight? s What is the
asked by James 
Math
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))
asked by Krista 
English
Can someone help me! The word metaphor comes from the Greek prefix meta, meaning “across,” and pherein, meaning “to carry.” Which of the following words does not contain the Greek prefix meta? a. metaphysics b. metamorphosis c. metallic
asked by Vicki 
Exponential
What is the sum of all integer values of x such that (x^2−17x+71)^(x^2−34x+240)=1?
asked by Mathslover 
chemistry
The NN bond energy is difficult to measure. Given the values of 190 kJ/mol for the NCl bond energy and 240 kJ/mol for the ClCl bond energy, determine the maximum de Broglie wavelength of an electron capable of breaking the NN bond. Express your answer
asked by ssss 
algebra
the number of calculators mrs. hopkins can buy for the classroom varies inversely as the cost of each calculator. she can buy 24 calculators that cost $60 each. how many calculators can she buy if they cost $80 each?
asked by s 
Physics***
1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another? 2) Determine what
asked by Isis 
Physics
How much work does it take to stretch a spring with k= 150N/M 10cm from equilibrium?
asked by James 
physics
if the shortest lenght of the tube for resonance is 0.1m and next resonanc length is 0.35m what is the frequency of the vibration.
asked by kelvin 
math
Epicure Market prepares fresh gourmet entrees each day. On Wednesday, 80 baked chicken dinners were made at a cost of $3.50 each. A 10% spoilage rate is anticipated. At what price should the dinners be sold to achieve a 60% markup based on selling price?
asked by sharon 
Math PLEASE help
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))
asked by Krista 
Social Studies
To what extent did the Japanese worldview change during the Meiji period.
asked by Cherie 
math
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. yhat = + x (ii) Graph this equation on a scatter diagram. (Do
asked by Sue 12 
Physics
A car with its 2 headlights on is approaching you at night. Approximately how close (in meters) does the car have to be to you so that you can distinguish the two headlights? Assume that the diameter of your pupils is 6.5 mm, the distance between the two
asked by Anonymous 
business math please help me
Ned’s Sheds purchases building materials from Timbertown Lumber for $3,700 with terms of 4/15, n/30. The invoice is dated October 17. Ned’s decides to send in a $2,000 partial payment. By what date must the partial payment be sent to take advantage of
asked by April 
computers (Check)
Will someone please check my C++ for me? 1. What does the Load ( ) method do? Gets data from a file and puts it into a DataSet object.
asked by Lisa 
Math
Solve the Equations 142=587x 2x+96=443x 26=7x+4(2x4) 7x+5(4x4)=124 7x35=28 10x+36=1082x
asked by i need help 
physics
An oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the
asked by maddy 
math
At The Luminary, the markup on a halogen light fixture is 50% based on selling price. What is the corresponding percent markup based on cost
asked by Beth 
eDX
If the diffusivity is observed to double when the temperature increases by 10⁰ C, what is the activation energy for diffusion?
asked by Mike 
economics
explain how a us citizen whose income is in the top one percent would talk about scarcity
asked by Amber 
Math
Can someone please help me with these two. What is the quotient (6x)/(x^2+2x3)÷(x^24x12)/(x^2+4x+3) in simplified form? State any restrictions on the variable. Simplify the complex fraction ((x)/(x+2))/((1)/(x)+(1)/(x+2))
asked by Kylie 
SSC 101
Is the smallest group constituted by the triad, quadrad, dyad, or monad?
asked by Anonymous 
Music
7. A triplet is a series of how many notes?  I think it's 3 but it could also be any number of notes from what I read? 13. There are 6 whole steps in a wholetone scale True? Thanks MC
asked by mysterychicken 
Math
Christy rolls a number cube and then chooses a card from a set numbered 1 through 9. What is the probability that she will roll an even number and choose an odd card? Would the answer be 2/15?
asked by Alena 
Fibonacci sequence
The Fibonacci sequence a1=1,a2=1,a3=2,a4=3,a5=5,a6=8… is defined recursively using the formulas a1=a2=1 and an+2=an+an+1 for all n≥1. Find the greatest common divisor of a484 and a2013.
asked by Mathslover 
chemistry
What should be the pH of the aqueous layer to extract caffeine? There are three aqueous solutions that you may choose from. Answer A. pH >14, using 2.5 M NaOH (aq) B. pH 1, using 0.1 M HCl (aq) C. pH 6.2, using 0.1 M NaHCO3 (aq)
asked by A 
physics
A 5.0 ball is initially sitting at rest on top of a 41 m high hill. The ball is pushed with a force of 25 N for 3.0 s toward the edge of a hill. Upon reaching the edge, the ball is allowed to roll down the hill where it reaches the flat ground. To the
asked by maddy 
heeeelp physics
A tunable capacitor (with variable capacitance) is charged by a U 0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times.
asked by andrew 
hernandez
find the molar enthalpy of vaporization for a substance, given that 3.21 mol of the substance absolve 28.4 kj of energy as heat when the substance changes from liquid to gas? show the work
asked by ady 
physics
A box is placed 50 cm away from a double convex lens. The image is on the opposite side of the lens, is inverted and 50 cm away from the lens. find: a)the focal length of the lens. b)the height of the image. c) using the focal length that you found, how
asked by kate 
Physics
Light of a red laser (wavelength λ=650 nm) goes through a narrow slit which is only a=2 microns wide. After the light emerges from the slit, it is visible on a screen that is L=5 meters away from the slit. What is the approximate width on the screen (in
asked by Anonymous 
Chemistry
A comparison of density values obtained by Xray diffraction reveals that the percentages of vacant sites in aluminum (Al) are 0.0700% at 923 K and 0.0090% at 757 K. Given this data, determine the number of vacant sites per cm3 at 550 K. Express your
asked by Jma 
organic chemistry
for each of the following compounds, draw the form in which it will predominate at ph=3, ph=6, ph=10, and ph=14. a)CH3COOH b)CH3CH2NH3 c) CF3CH2OH please explain how to get answers. my book does not give clear examples.
asked by julia 
math
You are the buyer for The Shoe Outlet. You are looking for a line of men’s shoes to retail for $79.95. If your objective is a 55% markup based on selling price, what is the most that you can pay for the shoes and still get the desired markup?
asked by sharon 
math
If the markup of a fluorescent light fixture transformer is 120% based on the cost, what is the corresponding percent markup based on selling price
asked by Beth 
chemistry
What should be the pH of the aqueous layer to extract caffeine? There are three aqueous solutions that you may choose from. Answer A. pH >14, using 2.5 M NaOH (aq) B. pH 1, using 0.1 M HCl (aq) C. pH 6.2, using 0.1 M NaHCO3 (aq)
asked by A 
heeeeeeelp math
Miles has 4 Lego people in his Lego town. A Lego person consists of exactly 1 set of legs, a torso, and a head. All of these body parts are distinct. Miles' son comes in and takes apart the Lego people. How many different sets of 4 Lego people can be
asked by andrew 
math
Using the information you calculated in the question above, consider the following. 15% discount on plastic mats with the purchase a chair the mat is $29.00. You also decide to purchase a twoyear leather protection plan on your chair for $19.95. If you
asked by Anonymous 
Math
Hunter and his father drove 582 miles in 4 days. They drove 102 miles on the first day. Then they drove the same number of miles on the second, third, and fourth days. How many miles did they drive each day after the first day?
asked by Vy 
English Pls Writeacher Help Me by checking my work
write a news story in invertedpyramid style. Begin your story with a summary news lead of no more than 20 words and then write a full story using inverted pyramid style. Using the scenario below. A home at 2481 Santana Avenue was burglarized between the
asked by Mary 
economics
the south african goverment is not providing enough welfare or subsidies to the poor and underpriviledged
asked by yolokaz 
us history
Who were three significant black abolitionists prior to and during the Civil War?
asked by paty 
math
let f(x) = 4x  5 a) find f(3) b) find x when f(x) = 21 my answer for a is f(3) = 7 and for b is x = 4. are these correct?
asked by Anonymous 
math
Consider the following. (a) What percentage of a normal distribution is greater than the mean? (Give your answer correct to the nearest percent.) Incorrect: Your answer is incorrect. . % (b) What percentage is within 1 standard deviation of the mean? (Give
asked by Nora 2 
math
Myra's bulletin board has a length of 60 inches across the bottom. When she originally decorated it she used 192 inches of border material. What is the width (height) of the bulletin board?
asked by zmarie 
math
Myra's bulletin board has a length of 60 inches across the bottom. When she originally decorated it she used 192 inches of border material. What is the width (height) of the bulletin board?
asked by zmarie 
math
Myra's bulletin board has a length of 60 inches across the bottom. When she originally decorated it she used 192 inches of border material. What is the width (height) of the bulletin board?
asked by zmarie 
math
Slope and yintercept in 3x2y=10 my answer: slopeintercept form is y = 1.5x + 5 and the slope is 1.5 and the yintercept is 5.
asked by Anonymous 
Math
Consider the following. P(A) = 0.27 and P(B) = 0.36, A and B are mutually exclusive events (a) Find the probability P(A). (Give your answer correct to two decimal places.) (b) Find the probability P(B). (Give your answer correct to two decimal places.) (c)
asked by Nora 4 
Algebra
x/6=5
asked by cheyenne 
Math
In math we're doing a review sheet and i don't get any of it so can someone please help!! What is the simplest form of the expression Radical 28 + radical 175  radical 7
asked by Alyssa 
math
Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) (b) Calculate the standard deviation of the six xvalues and
asked by Sue 12 
English12
Need help on a Research paper, my author is CS Lewis, I am having a major writers block on what to write about, teacher has left it fairly open, need to have an outline and cited works today but he is pretty slack I could have it in tomorrow and be fine,
asked by Brad 
math
The computerscience aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computerscience course. The results were as follows. (Give your answers correct to two decimal places.)
asked by Sue 12 
Math
2x+3=7? someone please help!
asked by cheyenne 
math
Office Market is having a sale on printer paper. If you buy 2 reams for $8.99 each, you will get a third ream free. Calculate the markdown percent. (Round the percent to the nearest tenth.)
asked by tisha 
Math
An object is 6m away from the base of a mast. The angle of depression of the object from the top of the mast is 50 degree. Find, correct to 2 decimal places, the height of the mast.
asked by Adigun 
Physics
Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.
asked by Adam 
english 2
The paragraph below needs to be made more coherent. Use repetition, synonyms, and pronouns to link the sentences. Type the improved paragraph in the space provided on the following page Many cities are easily distinguished by their skylines. In such
asked by Sam 
maths
a girl walks 4km due east and then 7km due north, how far is she away from her starting position?
asked by d.f 
math
a school sold $5 magnets for a 50% markup. they sold 120 magnets and spent $95 on supplies for the event. what was their total profit?
asked by andra 
math
a school sold $5 magnets for a 50% markup. they sold 120 magnets and spent $95 on supplies for the event. what was their total profit?
asked by andra 
Please Help
Let x,y,z be nonnegative real numbers satisfying the condition x+y+z=1. The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b?
asked by Mathslover 
Help me please Maths
Calvin is playing a game of Dungeons and Dragons. In order to make it across the river, he needs to throw six 4sided dice, and have their sum be a multiple of 5. How many different dice throws result in Calvin making it across the river? Details and
asked by Mathslover 
Finance
Bond out standig with an $85 annual intrest payment market price $800 and maturity date is 5 years find coupon rate currnt rate aproximate yield to maturity
asked by Najeeb 
CHEMISTRY SCIENCE
Points in favour: 1.Diffusion helps reduce the pollution of toxic gases. Points against: 1. old stains of ink, tea/coffee, cooked food are hard to remove through diffusion, or just hard to remove ... can u please elaborate on the same topics we are
asked by MALAVIKA 
chemistry
Derive the empirical formula of a hydrocarbon that on analysis gave the following percentage by mass composition: C = 85.63 % and H = 14.37 %. If the molecular mass of this compound is 56 g, derive the molecular formula.
asked by Hanin 
physics
a concave mirror has a focal length of 20 cm. A person places her face 15 cm away from the mirror. a)how far is the image from the mirror? b)what would have happened to the person's image if she had placed her face 25 cm away from the mirror?
asked by patty 
physics
if a scientist working with electromagnetic radiation has detected a frequency of 2.8X10^10Hz for one of the waves, what is the wavelength of this radiation wave?
asked by carmen 
circuits
Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.
asked by Adam 
flordia
XYZ Manufacturing, Inc., located in Centervale, uses the calendar year and the cash method of accounting. On December 31, 2010, XYZ made the following cash payments: •$100,000 for a twoyear office lease beginning on February 1, 2011 •$58,000 of
asked by mary 
Chemistry
A comparison of density values obtained by Xray diffraction reveals that the percentages of vacant sites in aluminum (Al) are 0.0700% at 923 K and 0.0090% at 757 K. Given this data, determine the number of vacant sites per cm3 at 550 K. Express your
asked by Jma 
Algrebra
7x+10=59 107x+10=5910 3x+10=49 ??? 3+x=5 3+(3)+x=5+3 x=8 Is this right Ms.Sue?
asked by cheyenne 
Algebra1study helps
Solve the equation, please help. 1/(3× +9)  2/(× +3 ) = 2 options: x=1, x= 23/6, x= 5/2, x= 5
asked by Jennifer W. 
math
$6000.@ 4% for 2 years
asked by jim 
Vectors
The person who helped me before was not very helpful. ABC has vertices A(3,2,5), B(4,1,7) and C(8,3,6). a) Determine the area of ABC. b) Determine the coordinates of point D such that ABCD is a parallelogram. c) Is the parallelogram a rectangle?
asked by samantha 
PreCalculus
A gardener has 100' of edging. She wants to use it to enclose a 130 square foot rectangular area; she does not have to use up all of the edging. What are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: If
asked by Robert 
pllllls heeeeeeeeelp math
Let x,y,z be nonnegative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?
asked by andrew 
Statistics
You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes
asked by Kathryn 
Math
a self checkout register to pay for products totaling $14.50. The customer is concerned they did not receive the proper change. How much money should they have received back from the automated register?
asked by Anonymous 
math
Office Market is having a sale on printer paper. If you buy 2 reams for $8.99 each, you will get a third ream free. Calculate the markdown percent
asked by Beth 
math
Office Market is having a sale on printer paper. If you buy 2 reams for $8.99 each, you will get a third ream free. Calculate the markdown percent. (Round the percent to the nearest tenth.)
asked by sharon 
math
What was the original selling price of a treadmill currently on sale for $2,484 after a 20% markdown
asked by Beth 
economics
explain how a us citizen whose income is in the top one percent would talk about scarcity
asked by Amber 
math
The point A (7, 6) is reflected about the line x = 3, then about the line x = k. The final image is A”(5, 6). What is the value of k?
asked by lexie 
Math
I am an even two digit number. I have the same digit in my ones place and my tens place. The sum of my digits is 8. The product of my digits is 16. What number am I?
asked by Charlie 
trig
what are the values of the angle in the interval 0
asked by conor 
chemistry
how do i convert 0.00183338433 g/mL to mM? and putting it in 4 significant numbers. thank u
asked by michael 
physics
The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to
asked by Julia 
Math
Is there anyway of checking to see if anyone else has posted a question that may help you without going through the entire list for your subject???????
asked by Nora 
science
if a person puts 500 newtons into pushing an immovable wall that was 2 meters tall how many joules of work would they do
asked by Hannah 
math
simplify 27x^2y^6 / 3x^5y^2z^0
asked by Ash 
chemisry
Calculate how long it will take for the conctration of SO2Cl2 in the reactor in part (a) to fall to 1/4 of its initial value.
asked by Anonymous 
chemistry
try comparing the e values with of silver and i think you will see a reason why..
asked by barco 
math
Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y)
asked by Sue 12 
DesignIT
i'm doing a presentation for Design Technology food. it requires me to have good it skills, which i lack. :) this is my problem i got a video from a website. i now need that video to be on powerpoint without me copy a pasting the URL address.
asked by HS 
Math
Six friends want to buy pizza and need to decide between two deals. The first deal is for two pizzas for $7.00 each for a pizza with a 10 inch diameter. Or a second deal with one pizza with a 14 inch diameter for $15.00. The friends decide to buy the offer
asked by Susan 
math
Bloomingdale’s purchases imported perfume for $24.30 per ounce. If the store policy is to mark up all merchandise in that department 39% based on selling price, what is the retail selling price of the perfume?
asked by tisha 
Math
What is 8% on $8.00?
asked by Cindy 
Maths Please Help
Suppose a,b, and c are positive integers such that a+b+c+ab+bc+ca+abc=1000.
asked by Mathslover 
fire science
A compartment measures 14 feet wide, 12 feet long and 8 feet high, lined with ½ inch sheetrock and has a standard 36 inch by 80 inch door. What HRR is required for flashover?
asked by Pete 
math
Bloomingdale’s purchases imported perfume for $24.30 per ounce. If the store policy is to mark up all merchandise in that department 39% based on selling price, what is the retail selling price of the perfume?
asked by Lamar 
statistics
Estimate the tenure of someone that could have $5.8($k) and 15 years of job satisfaction. Make sure to state your multiple regression equation in your example. What are some of things that you can estimate from the model? How effective is evaluating the
asked by Kathryn 
physics
The focal length of objective of a telescope is 0.2 m and the eyepiece has a focal length of 1.6 m. What is the length of this telescope? A) 8.0 m B) 1.4 m C) 1.6 m D) 1.8 m
asked by dianna 
circuits
A string of five series resistors is connected across a 20 v battery. Zero volts are measured across all the resistors except the second one. What can be wrong with this circuit?
asked by Adam 
Physics
What would be the radius (φmax, in degrees) of a glass bow? The glass beads have an index of refraction n=1.5. We spread them out on the ground and we observe a glass bow as the sun is high in the sky.
asked by Anonymous 
Physics
The average index of refraction of water is n=1.336. (a) What is the Brewster angle θBr when light reflects in water off air (i.e. at point B) (give your answer in degrees)? (b) r is the angle of incidence of the light ray at point B in the figure above.
asked by Anonymous 
math
SOLVE FOR P, Q, &R
asked by joe 
math
SOLVE FOR P, Q, &R p + 1/(Q+ 1/R)= 25
asked by joe 
SOC  322
Please Help! What are the intimacy needs for older adults in each of the following relationship types: marriage, widowhood, divorce, the never married, and remarriage?
asked by Jay 
algebra 1 study helps
Any help would be appreciated. Thanks. What is the simplified form of the expression? 2b–6 • b12 3b–72 2b6 2b–72 3b6
asked by Jennifer W. 
math
in a serving of favorite breakfast meats 22 people chose fish 72 bacon 89 sausages and 42 chose ham. what percent of the people surveyed chose sausage as their favorite breakfast meat
asked by Skylar 
Life Orientation
What are the ten ways in which heart diseases impact on the teenager?
asked by NL Pearl 
Math
Solve . Each Equation. x+9=11 m6=15 72=6w
asked by Diamond 
math
solve the equations 10(7x+15)=410 532=7(7x13) 52+9x=178 21=15+4x 168=47+11x
asked by Diamond 
Statistics
Calculate a linear regression, the residuals, and the correlation between two variables using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,85
asked by Kathryn 
c.math
the total surface area of a cylinderical can, whose height is equal to the radius of the base is 2646 cm, find its volume.
asked by new florance internationa boarding school 
PreCalculus
A gardener has 72' of edging. She wants to use it to enclose a 125 square foot rectangular area; she does not have to use up all of the edging. What are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: If
asked by Trevor 
math
x+9=11 m6=15 72=6w
asked by i need help 
Physics
If the coefficient of kinetic friction is 0.25, how much work do you do when you slide a 45 kg box at constant speed across a 5.8m wide room?
asked by James 
Math
Solve the Equations 142=587x 2x+96=443x 26=7x+4(2x4) 7x+5(4x4)=124 7x35=28 10x+36=1082x
asked by i need help 
math
Mark's house is 90 miles away from New York. You travel 15 miles on city streets, and then 75 miles on the highway. a. your average speed is 25 miles per hour in the city and 60 miles per hour on the highway. Use the formula time=distance/rate. How much
asked by Celest 
math
Solve the Equations 142=587x 2x+96=443x 26=7x+4(2x4) 7x+5(4x4)=124 7x35=28 10x+36=1082x
asked by i need help 
soc 120
Virtue ethics regards which of these as virtues?
asked by sharon 
math
Bloomingdale’s purchases imported perfume for $24.30 per ounce. If the store policy is to mark up all merchandise in that department 39% based on selling price, what is the retail selling price of the perfume?
asked by stacy 
Physics
A compartment measures 3 meters by 5 meters and is 2.8 meters high. A fire raises the temperature from 20oC to 1000 oC. If the starting pressure was 1 atmosphere, what pressure is present at the elevated temperature assuming the compartment remains closed?
asked by Pete 
Physics
A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to
asked by Pete