Questions Asked on
April 20, 2012

statistics
Using the Chisquare test I am having problems when I get to the part of adding the the fractions and getting the percent that must be rounded to three decimal places. I have looked in the text and searched the internet. Can you please me
asked by Mary 
Physics 30
If a truck moving at 30km/hr accelerates at 2.5m/s^2 to 50 km/hr, what time (in sec) does it take? a. 2.22s b. 5.56s c. 8 s d. 28.8s
asked by Don 
Social Studies
Daughter was born on 719. Son on the 24 thof the 2 month and my sister in the 51st year of our lord father in the 42nd year. What is my sign?
asked by Janell 
Chemistry
A solution household bleach contains 5.25% NaClO, by mass. Assuming that the density of bleach is the same as water(1.0g/ml). Calculate the volume in mL of household bleach that should be diluted with water to make 500.0 ml of a pH= 9.80 solution. Here's
asked by Katherine 
Chemistry
Calculate the concentrations of all species in a 0.810 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4 x 10^2 and Ka2 = 6.3 x 10^8 so I'm trying to find Na, SO3 2, HSO3, H2SO3, OH, H+ and heres what I
asked by Katherine 
Life orientation
5 ways in which the human or environmental problem impact lack of infrastructure on the community.provide relevant sources to support your claims.
asked by Maalebogo 
Math/ Algebra 2
How many different ways can the letters in the word COMBINATIONS be arranged if the letter C is first and the letter S is last? Thank you in advance ^^
asked by Cindy 
Chemistry
C6H5COOH(aq) + NO2(aq) C6H5COO(aq) + HNO2(aq) A table of ionizations is given to calculate the equilibrium constant for this overall reaction.. but when i looked onto the table the only thing given was the Ka for C6H5COOH [6.3×10^–5] and HNO2
asked by Katherine 
Algebra 2
There are 8 movies you would like to see currently showing in the theater. Due to time offerings, 2 of the movies must be seen first and second respectively. A) In how many different ways can you want all the movies?
asked by Cindy 
Math
One bag contains 4 pink marbles and 4 turquoise marbles, and a second bag contains 2 white marbles and 1 pink marble. If Angel randomly draws one marble from each bag.... A) What is the probability that they are both pink?
asked by Cindy 
geometry
If all of the diagonals are drawn from a vertex of a quadrilateral, how many triangles are formed?
asked by nicole 
life orentation
provide 5 ways in you critically discuss how life style disease/behaviour impact on the teenager
asked by thandixolo 
chemistry
How do you calculate the solubility at 25°C in grams per liter of silver iodide in an aqueous solution that is 0.15 M inpotassium iodide and 0.25 M in ammonia.
asked by Lisa 
Government
Does the U.S. have a responsibility to become involved in Syria or any other country where civilians are being killed by their leaders?
asked by Kate 
programming
write a payroll program that promt a user to enter his name,hourly rate,working hours in the week and display the amount earning by each employee in Rand.user is not allowed to enter any negative value for hourly rate and working hours.
asked by Anonymous 
algebra
URGENT! How do you calculate for marginal cost against fixed cost. E.g., a company produces 2 pairs of shoes at $390.00. If it produces 1 more pair (making total production 3), total cost is $600.00. If no production is made, the fixed cost is $130. With
asked by Garnett 
programming
write a java application to calculate the exponent value of a number using the following specification
asked by Anonymous 
Chemisty
N2+3H2=2NH3 Assume 0.150 mol of N2 and 0.477 mol of H2 are present initially. After complete reaction, how many moles of ammonia are produced?
asked by Jenn 
physics
The length l of a simple pendulum is about 0.5m, and can be measured within 1mm. what accuracy is required in the measurement of periodic time T of 100 oscillations if the error in l and T are to produce equal percentage in the calculation of acceleration
asked by ridhi 
geometry
A swimming pool circular in shape has its distance around 282.74 ft, what is the area? in cm^2 in in^2 in m^2 TIA
asked by kilkaru 
chemistry
In 1999, chemists working for the Air Force Research Laboratory reported that they had produced a compound containing an unusual ion with the formula N5 +. This ion had not been expected to exist, and its instability makes it both diffi cult and dangerous
asked by aydin 
physics
a 2kg and a 4kg hang freely at opposite end of a light inextensible string which passes over a small and light pulley fixed to a rigid support.calculate the acceleration of the system.
asked by ali 
physics
A 40N force applied at an angle of 37 degrees above the horizontal pulls a 5kg box on a horizontal floor. the acceleration of the box is 3meter per second square. how large a frictional force must be retarding the motion of the box. a.50N b.13N c.17N d.25N
asked by ali 
physics
A certain refrigerator is rated as being 39% as efficient as a Carnot refrigerator. To remove 102 J of heat from the interior at 0 °C and eject it to the outside at 23 °C, how much work must the refrigerator motor do?
asked by zuhra 
chemistry
Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the
asked by krystal 
English
Can you please tell me where I can interview homeowners, will they agree if its for school purpose? Thank you!
asked by Layal 
physics
How much energy becomes unavailable for work in an isothermal process at 440 K, if the entropy increase is 25 J/K
asked by I 
science
A rectangular container measuring 28 cm 43 cm 58 cm is filled with water. What is the mass of this volume of water in kilograms and grams? (Take the density of water to be 1000 kg/m3.) kg g
asked by Anonymous 
geometry
The deck in Alice's back yard is round. It has 5 posts evenly spaced around the edge to support a trellis. For her get together, she wants to connect each post to all the other posts with red ribbons. How many ribbons will she need.
asked by Carol 
Math
Suppose three coins are tossed. What's the probability of having exactly 1 tail, 3 tails, or all the same?
asked by Carol 
LIFE ORIENTATION
ENVIRONMENTAL PROBLEM THAT CAUSES ILL,ACCIDENTS,CRISES,AND DISASTARS
asked by MATTHEWS 
chemistry
Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the
asked by krystal 
chemistry
Given the following information: Ni(OH)2(s) Ni2+(aq) + 2 OH (aq) Ksp=6.0 x 10 16 H2O(l) H+(aq) + OH (aq) Kw=1.0 x 10 14 What is the equilibrium constant for the reaction, Ni(OH)2(s) + 2 H+(aq) Ni2+(aq)+ 2 H2O(l)
asked by Frank 
math
Note: Object not drawn to scale If X = 3 inches, Y = 10 inches, W = 4 inches, and Z = 5 inches, what is the area of the object?
asked by Anonymous 
Maths
need extra classes for my son grade2 Parsons Hill Primary school
asked by Queen 
math
where to find Assignment Expert in port Elizabeth to attend.
asked by Queen 
Chemistry
calculate the amount of heat energy in joules to condense 125g of steam at 100 degrees celcius and cool to the liquid to 15 degrees celcius?
asked by Kimberly 
English
What is the regular verb or verb phrase in these sentences. Most other children received lessons from home. Today, students usually attend formal schools. In ancient Greece, Socrates worked with small groups of students. These advances are creating new
asked by KATHY☺☻ 
PHYSICS
An electron is located on a pinpoint having a diameter of 2.04 µm. What is the minimum uncertainty in the speed of the electron?
asked by na 
Mathematics
simultaneous equation x squared = 4y x = y+2
asked by India 
chemistry
Questions 23 refer to : 〖KClO〗_3 + C_6 H_12 O_6 = KCl + 〖CO〗_2 + 〖H〗_2O? 2. Balance the equation. How many mole of potassium chlorate react with 0.250 mole of glucose How many grams of carbon dioxide are formed. How many grams of water are
asked by jhong 
ChemistryI
If an ideal gas occupies 736 ml at 45C and 719 torr, what volume will it occupyat 105Cand 972torr?
asked by cc 
Chemistry
A Gaseous mixture contains 4.08g of oxygen and 2.78g of Nitrogen a)What pressure is exerted by the mixture inside a 100.0ml metal container at 150C. b) what pressure is contributed by the oxygen? (please show steps)
asked by cc 
Life orientation
What are the realistic and appropriate ways to deal with drug addiction?
asked by Karabo 
Physics
A certain radio station broadcasts at 1430 kilohertz. This is the frequency of oscillation of electrons in the transmitting antenna producing the radio wave. Find the period of the electrons' motion.
asked by Alex 
Physics (Waves)
You have 27 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time, depending on how the frequencies differ? *I KNOW
asked by M 
Physics. PLEASE HELP!!
A 1.2 m diameter wagon wheel consists of a thin rim having a mass of 11 kg and six spokes, each with a mass of 1.1 kg. Find the moment of inertia of the wagon wheel for rotation about its axis. Answer in units of kg · m2
asked by Amber 
Physics. PLEASE HELP!!
A uniform disk with a mass of 130 kg and a radius of 1.2 m rotates initially with an angular speed of 950 rev/min. A constant tangential force is applied at a radial distance of 0.5 m. How much work must this force do to stop the wheel? Answer in units of
asked by Amber 
Physics. PLEASE HELP!!
Consider a wheel (solid disk) of radius 0.748 m, mass 16 kg and moment of iner tia 1/2 MR^2 . The wheel rolls without slipping in a straight line in an uphill direction 27 above the horizontal. The wheel starts at angular speed 20.5882 rad/s but the
asked by Amber 
CHEMISTRYYY
What is the theoretical yield of ethyl chloride in the reaction of 20.2 g of ethylene with 53 g of hydrogen chloride? (For ethylene, 28 amu; for hydrogen chloride,36.5amu ; for ethyl chloride, 64.5 amu.) What is the percent yield if 23.5g of ethyl chloride
asked by Anonymous 
chemistry
if 48.3 g of an unknown gas occupies 10.0 L at 40 degrees celsius and 3.10 atm, what is the molar mass of the gas?
asked by sherly 
consumer business math
Beth Pittman earns $12,558 per year. She is paid 52 times per year and claims 2 exemptions. If $8.85 in taxes is withheld from each paycheck, at what rate is she taxed? The answer options are: 3.9% 4.2% and 5.1%
asked by BUG 
Calculus
Let R be the region bounded by the yaxis and the curves y = sin x and y = cos x. Answer the following. a)Find the exact area of R. b)A solid is generated by revolving R about the xaxis. Find the exact volume of the solid.
asked by ronnieday 
Polar Equations
I am supposed to identify the classical curve that is represented by r = 1 + sin Theta. I think it's a cardioid, because its equation is r = 1 + 1 sin theta (r = a + a sin theta). Is this correct?
asked by Tabby 
Physic
If a circular space station has on outside radius of 750Km, how fast must the space station rotate in order to give an astronaut with a mass of 90Kg an acceleration of 9.8m/s^2?
asked by Ernest 
calculus
Take an 8.5 by 14inch piece of paper and cut out four equal squares from the corners. Fold up the sides to create an open box. Find the dimensions of the box that has maximum volume. (Enter your answers as a commaseparated list. Round your answer to
asked by Anonymous 
physics
A 89.0 N grocery cart is pushed 13.0 m by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is its final speed?
asked by katt 
Business Math
The balance sheet of karim imports lists the following account balances: cash 6,450 supplies 1,200 accounts receiveable 15,360 office equipment 8,500merca
asked by T 
Maths
Using appropriate prperties find: 4/5*(2/3) 4/5* 1/2 + 1/7* 2/3
asked by Job Daniel 
Programming logic and design
Design a program that lets the user enter the total rainfall for each 12 months into an array. The program should calculate and display the total rainfall for the year the average monthly rainfall, and the month with the highest and lowest amounts. In
asked by javane 
Math
Area formula for a circle
asked by Anonymous 
Physics
Steel railroad tracks of length L = 18.30 m are laid at 10.0° C. How much space should be left between the track sections if they are to just touch when the temperature is T = 49.0° C? mm Please help. I have tried this L° α Δt = 18.3 * 13 10^6 * (49
asked by Amy 
life orientation
Identify and describe one environmental problem that causes ill health,accidents,crises and disaster within your community or any other community within south africa or globally?
asked by Anonymous 
discrete math
Find the solution to the following recurrence: an=3an−1+7 for n2 with initial conditions a0=7
asked by cjones 
discrete math
Find the solution to the following lhcc recurrence: an=3nan−1 for n2 with initial conditions a0=4.
asked by cjones 
Calculus grade 12
Determine the derivative of each function A1) y = e^x(Sin²x) A2) y = e²Sin²x B1) y = (x³ + 1)e^2 B2) y = (x² + 1)e^2 C) y = x²(theta^Sinx)
asked by Julie 
Calculus grade 12
Determine the equation of the tangent line to the function f(x) = x + Sinx at x = pie
asked by Julie 
Mathematics
Express 3x squared + 2x + 1 in the form a(x+p)squared + q where a,p and q are real numbers
asked by Sam 
Math
A bag of 12 white marbles and 1/3 red marbles and 2/5 blue marbles what is the total marbles in the bag?
asked by Tom 
Polar equations  Help?
i need to graph the polar equation 2 = r cos (theta + 180) on one of the graphs that looks like a flattened globe. So far I have 2=r cos180 costheta + r sin180 sintheta what do i do now?
asked by Tabby 
SDU
A nickel is tossed 20 times in succession. Every time the nickel comes up heads, a dime is tossed, Let X count the number of heads appearing on tosses of the dime. Determine P(X=0) and P(X=1).
asked by Anonymous 
Logarithms
solve 6 = 15^1x by using logarithms. Round your asnwer to the nearest thousandth. PLease help?
asked by Tabby 
Calculus
Find the derivative 1. y = e^xSin²x 2. y = (x³+1)e^4 3. y = x²e^Sinx
asked by Anonymous 
Physics
A cube of ice is taken from the freezer at 8.8°C and placed in a 103 g aluminum calorimeter filled with 321 g of water at room temperature of 20°C. The final situation is observed to be all water at 15°C. What was the mass of the ice cube? Could
asked by John 
statistics
In which data set is there evidence of a strong nonlinear relationship between the two variables?
asked by cc 
chemistry
The chemical reaction N2(g) + 3 H2(g) ↔ 2 NH3(g) is at equilibrium. An experimenter injects a small amount of N2 into the reaction chamber. What happens to the forward reaction rate right after the injection of the N2?What happens to the reverse reaction
asked by Anonymous 
distance formula
I need to find the distance between two points, (6,3) and (1,4). d = sqrt[(x2x1)^2 + (y2y1)^2)] I got that down to the sqrt of 98, which is the decimal 9.899494937, approximated at 9.9. Is this the right answer?
asked by Tabby 
Statistics
Determine if a linear relationship exists between unemployment rates and cost of living indexes by constructing a scatter chart and adding a trend line. What is the regression model and R2?
asked by Tiffany 
bobpursley
write the equation of the ellipse with foci at (0, sqrt3) and (0, sqrt 3) and for which 2a=4 i've done this befoe, but with squareroots as endpoints. and if 2a=4, a=2, right? Please help me.
asked by Tabby 
math
how do we find the surface area? top: bottom: right: left: front: back: its still hard when we i find the surface area of a rectanguar prism.
asked by Celest 
physics
"Only two forces act on an object (mass = 3.90 kg), as in the drawing. (F = 76.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. " (The angle is 45 degrees and the horizontal force is 40N)
asked by Allie 
Applied Calculus
Suppose that an object is thrown down towards the ground from the top of the 1100ft tall Sears Tower with an initial velocity of – 20 feet per second (the negative velocity indicates that the object is moving towards the ground). Given that the
asked by Marie 
Math
How much interest is earned on 20,000 at 6% for 2 yrs compounded annually?
asked by Michelle 
Applied Calculus
For the average person that is still growing, the rate of change in weight W (in pounds) with respect to height h (in inches) is approximately dW/dh=0.0015h^2 pounds per inch. Suppose that the average person that is 60 inches tall weighs 108 pounds. Find
asked by Marie 
economics
In 1989, the Detroit Free Press and Detroit Daily News (the only daily newspapers in the city) obtained permission to merge under a special exemption from the antitrust laws. The merged firm continued to publish the two newspapers but was operated as a
asked by Tiffany 
physics
"Only two forces act on an object (mass = 3.90 kg), as in the drawing. (F = 76.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. " (The angle is 45 degrees and the horizontal force is 40N)
asked by Allie 
algebra
theperimeter of a rectangle is32 ft. The lenght is 12 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the lenght and y be the width write the first equation 2x2y= write the second
asked by Anonymous 
economics
Over the last 30 years in the United States, the realprice of a college education (i.e., after adjusting for inflation) has increased by almost 70 percent. Over the same period, an increasing number of high school grad uates have sought a college
asked by Joanne 
science
fill in the blanks with these worsd: galaxies gunpppowder guns hubble space telescope mummy sealed tomb the invention of 1990 of the led to the 1996 discovery of new .
asked by science 
language arts
i need help depicting a poem using literary terms. The poem is Dear Sister and goes: Do not believe what all you read in the papers, Leona, about the strikers being reds. It is true, the Communist Party of New York sent down a truckload of potatoes. You
asked by hannah 
MATH##$$&&^^**
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.
asked by Bridget 
Algebra
Which equation shows an exact computation? A. 12/7 = 1.714 B. 2π = 44/7 C. 22/7x14 = 44 D. 2√2 = 2.818 And if possible, could you explain what exact computation is? Thank you.
asked by Nicole 
medical transcription
Please help to perfect my grammar, lot of confusion and trouble, please help me. Now usage of "complains of" and "complaints of"
asked by baby 
Algebra
Use the function to answer the question. f(x)=1/4x For what value in the domain is the function undefined? Explain your answer.
asked by Nicole 
rational exponents
express the third root of(8a^3y^5) using rational exponents. Please show your work!
asked by tabby 
maths
Continue these decimal patterns a) 1,0.5,0.3,0.25,0.2, ,,. b) 0,0.5,0.6,0.75,0.8,0.83,,,
asked by RS 
English
I urgently need to revise a few sentences containing reflexive pronouns. I really hope you can help me. 1) I was last proud of myself when I won a swimming competition. I (once) blamed one of my friends for telling me a lie. 2) I depend on my parents.
asked by Matthew 
to ms.sue
e area when there is 3 numbers. which one is base, height, and width.
asked by Celest 
physics
a bar is pushed so that it slides across the floor. how far will it go, given the coefficient of kinetic friction is 0.25, and the push imparts an initial speed of 2.5m/s?
asked by krag 
to ms.sue
i still don't get surface area!
asked by Celest 
Chemistry!!!
Consider the rxn during the Haber Process: N2 + 3H2 > 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(1) at 500 K. Find Delta H reaction and Delta S for reaction
asked by John 
English
Here are other sentences I need to check. I really hope you can check them, Writeacher. 1) blamed my friend Peter for breaking some plates, but the real guilty was me. I’m quite independent of my parents because I do a lot of things without their help.
asked by Matthew 
Algebra
Devin attempted to solve the inequality 2x+6>10 following the steps below: •subtract 6 from both sides of the inequality. •divide both sides of the inequality by 2. He finds that x>2. Clearly explain why this is not a correct solution. In your
asked by Nicole 
Statistics
An automobile dealership has as one of its performance goals that the proportion of its automobiles sold that are deemed “good value for the money” by the purchasers be at least .90. For a random sample of 400 automobiles sold over the past six months,
asked by Sheila 
Polar equations
write the polar eqaution 3 = r cos (theta  315) in rectangular form.
asked by tabby 
Applying Algebraic Thinking to Data
Snoopy is in his plane, 4500 ft above ground. he fires a projectile straight up. The Vo of the projectile is 340 ft/s. (after the projectile is fired, it has no acceleration, so its height can be modeled by a "falling body" model). The Red baron is
asked by Rachelle 
College Algebra
Solve the equation. If necessary, round to the nearest thousandth. 5(2x1)=10
asked by Christina 
Polar equations
write 3x6y=14 in polar form. round phi to the nearest degree
asked by Please Help Me! 
College Algebra
ln(8x+3)=ln11
asked by Jack 
College Algebra
log(x+10)=1+log(4x3)
asked by Brian 
Math
It is known that if the deer population falls below a certain level, m, then the deer will become extinct. It is also known that is the deer population goes above the maximum carrying capacity, M, the population will decrease to M. (a) Discuss the
asked by Jenny 
Calculus
Use the form of the definition of the integral to evaluate the intergral. From 0 to 9 (10+6xx^2)
asked by Andrew 
College Algebra
log5 (x+2)+log5(x2)=3
asked by David 
chemistry
How much heat (in Kj ) is required to warm 10.0g of ice, initially at 11.0 C, to steam at 112.0 C?
asked by haley 
Applied CalculusQuestion for Damon
Hi, I have two other questions for Applied Calculus but they have graphs and I am unable to post them in here. Is there a way you could help me out with the questions?
asked by Marie 
math
mr.lopez is putting a face around his vegetable garden. the garden is shaped like a rectangle.the longer side are 14 feet long, and the shorter side are 9 feet long how much fencing should mr.lopez buy
asked by lise 
Chemistry
How much heat (in Kj ) is required to warm 10.0g of ice, initially at 11.0 C, to steam at 112.0 C?
asked by Haley 
Chemistry
Suppose that 1.00 g of rubbing alcohol (C3H8O) evaporates from a 57.0g aluminum block If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the
asked by Haley 
Calculus AB
y=6x y=x^2 Find the area of the region by integrating with respect to x. Find the area of the region by integrating with respect to y.  i got the intersection pts to be(3,9)and (2,4)....i then took the integral and
asked by janki 
COM 200 Interpersonal Communication
True or False: Because words have human senders and receivers, they also have multiple intentions and interpretations.
asked by ree 
Interpersonal Communication
True or False: Americans tend to look at others above the neck or below the knees. Looking at other parts of a person’s body is considered impolite, while looking at anyone for more than three to five seconds can be interpreted as staring.
asked by ree 
calculus
Consider the function f(x)=(x^3)(e^9x), 2 is less than or equal to x is less than or equal to 4 *The absolute maximum value is _____ and this occurs at x equals 4. *The absolute minimum value is _____ and this occurs at x equals ______ I got the 4 but I
asked by casidhe 
Science
Why are xrays uneffected my electric and magnetic fields. Please help me to understand this. I think that xrays are unefected because each has a different wavelength of radiation. These different wavelengths cause no effect.
asked by Sam 
math
Area A sequence of smaller squares is formed by connecting the midpoints of the sides of a larger square. (a) If the area of the largest square is 1 square unit, determine the first five terms of a sequence that describes the area of each successive
asked by chris 
calculus
I've done the first question but I cannot get any farther. I'm so stuck. Please explain or just help me to figure out the next steps. A printed poster is to have a total area of 837 square inches with top and bottom margins of 7 inches and side margins of
asked by casidhe 
statistics
Joan has j
asked by Mike 
physics
The balloon contains 0.30 mol of helium starts at a pressure of 125 kpa and rises to an altitude where the pressure is 55.0 kpa, maintaining a constant 300 {\rm K} temperature. A)By what factor does its volume increase? B)How much work does the gas in the
asked by I 
physics
A pulley with diameter D = 27in weighs 80 lb. It is mounted on a diameter d = 2in axle. A weight of 1000 lb is to be lifted. If the coefficient of friction f = 0.1, what vertical pull force P will be needed?
asked by Teri 
Calculus
A smoke detector contains 0.2 mg of Americium 241 (Am241), a radioactive element that decays in t years according to the relation m = 0.2(0.5)^(t/432.2). Where m is the mass, in milligrams, remaining after t years. A) The smoke detector will no longer
asked by Julie 
chemistry
the heat of vaporization of water is 2.26kJ/g. how much heat is needed to change 2.55 g of water to steam?
asked by Randy 
Geometry
What is the volume of a horizontal cylinder whose radius is 2.6 yd,and length is 8.4 yds to the nearest tenth of a cubic yard using 3.14?
asked by Jane 
not in school
Does age determine brain size?
asked by N. Paulus 
physics
In periods of peak demand, power companies lower their voltage. This saves them power (and saves you money!). To see the effect, consider a 1200 W coffeemaker that draws 10 A when connected to 120 V. Suppose the voltage is lowered by 13 % to 104
asked by Kristie 
Chemistry
consider the reaction: N2(g) + O2 (g) > 2NO (g) removing some of the N2(g) will_____ A) increase the concentration of O2 B) decrease the concentration of O2 C) increase the concentration of NO(g)
asked by Shannon 
physics
1909, Robert Millikan was the first to find the charge of an electron in his nowfamous oildrop experiment. In that experiment tiny oil drops were sprayed into a uniform electric field between a horizontal pair of oppositely charged plates. The drops were
asked by Kristie 
Chemistry
Which pair of compounds will form a solution? A) Benzene (C6H6) and Hexane (C6H14) B) Na2SO4 and Benzene C) NaCl and Hexane
asked by Emily 
MATH
Solve system of equations algebraically. 1. 3x3y=24 and 2x+5y=37 2. 9x+10y=2 and 45x50y=11 3. 9x3y=3 and 18x+6y=6 4. 5x6y=23 and 8x+7y=29 5. 9x7y=4 and 5x+3y=46
asked by Anonymous 
math
Determine the cost of painting the exterior walls and top of a cylindrical wheat silo that is 40 m high and 20 m in diameter. given that each litre of paint costs $7.25 and covers 8 meter square.
asked by alley 
chemistry
formula: 2KClO3 + NaCL = 2KCl + NaCl + 3O2 MASS OF TEST TUBE & MIXTURE = 34.03 G MASS OF EMPTY TEST TUBE = 31.29 G MASS OF MIXTURE = 2.74 G 1ST WEIGHT OF TEST TUBE & RESIDUE =33.64 G FINAL WEIGTH OF TEST TUBE & RESIDUE = 33.64 G MASS OF RESIDUE = 2.35 G
asked by presh 
Physics
A wheel starts rotating from rest with uniform angular acceleration.After 3.0,its completes one revolution.Calculate a) angular velocity after 3.0s. b)angular acceleration c)angular velocity after completing d)time taken for second revolution
asked by 115 
Chemistry
Write a balanced nuclear equation for the positron emission of each of the following nuclei: a) arsenic74 b) oxygen15
asked by Shannon 
math
A statue is 62 inches in height. When it is shipped in a box, it will have padding that is 4 inches thick on each end. Will the statue fit into a box that is 2 yards in height?
asked by neshia 
Chemistry!! Help
Consider the following equilibrium: N2O4 2NO2 You may assume that delta H and delta S do not vary with temperature. At what temperature will an equilibrium mixture of 1 atm total pressure contain twice as much NO2 as N2O4?
asked by John 
Geometry
Find the missing side. Approximate the answer to three decimal places when appropriate. A=15 yd C=25 yd? Help!
asked by Susan 
calculus
Find the dimensions of the rectangle with area 256 square inches that has minimum perimeter, and then find the minimum perimeter. Dimensions: Minimum Perimeter:
asked by casidhe 
Question (plz read!)
What is Equine Science????
asked by Laruen 
Integral calculus
Yesterday I posted this number that I don't understand. There was a mistake in the question,this is the right one: ∫ (5^(3/x)  (x^8 + 9)^1/3 ) / 3x^2 will u, for sub. be = x^8 + 9? Then du is = 8x^7 dx x^7 dx = 1/8 du Thank you!
asked by Tommy 
math
A recipe for cream of broccoli soup calls for 1 pint of cream and a quart of milk.to reduce the fat,Mrs.homes plans to use all milk. How many cups of milk should she use in the recipe?
asked by neshia 
math
If C dollars are deposited in an account paying r percent annual interest, approximate the amount in the account after X years if c=$250, r=2.4% and x=23 years?
asked by angel 
help
Introduction to quadratic equations? If you solve the equation by completing the square, fill in the blanks. 9x^2+9x+4=0 x^2+x+blank=4/9+blank
asked by Chelsea:) 
math
A recipe for cream of broccoli soup calls for 1 pint of cream and a quart of milk.to reduce the fat,Mrs.homes plans to use all milk. How many cups of milk should she use in the recipe?
asked by neshia 
geometry
what is the lateral surface area of the cone with radius 9cm and slant 12.5cm? possible answers; 221cm^2 240cm^2 304cm^2 620cm^2 Could someone please help
asked by lilman 
statistics
Dr. Snyder teaches a large introductory statistics course. In the past, the proportion of students that receive a grade of A is 0.20. The proportion that receives a B is 0.30. The proportion that receives a C is 0.30. The proportion that receives a D is
asked by Anonymous 
math
The odds for being assigned homework are 5.5 to 1. Find this expressed as a probability.
asked by ley 
Chemistry
What is the pH of a 0.0353M solution of NH4F and a 0.0000666M solution of NH4F?
asked by Janet 
Physics
A car is initially traveling at 20 m/s when it accelerates to 35 m/s in a time of 5 seconds. What is the acceleration of the car in m/s^2?
asked by Matthew 
calculus
An open box is to be made out of a 8inch by 14inch piece of cardboard by cutting out squares of equal size from the four corners and bending up the sides. Find the dimensions of the resulting box that has the largest volume. Dimensions of the bottom of
asked by casidhe 
Math
Which gender typically watches more television per month? Justify your answer. MALE . . . . :. . . : .: .. . .: . . . . . FEMALE . . .:. . . .::.. ::. .. . .        700 1050 1400 1750 2100 2450 2800
asked by Tessa 
physics
A wire of radius one meter is centered on the origin in the xy plane. This wire carries a total charge of +Q. Another wire of length two meters runs along the zaxis and is centered at the origin. It carries total charge Q. What is the electric field
asked by allan 
calculus
I've posted this question before and think I've made some progress but it some part of the second answer I got is wrong I've done the first question but I cannot get any farther. I'm so stuck. Please explain or just help me to figure out the next steps. A
asked by casidhe 
physics
a one meter chain that weights one newton sits on a flat horizontal table that is one meter from the floor. the coefficient of friction between the chain and the table is 0.15. how much of the chain can dangle off the table until the chain pulls itself
asked by david 
Algebra, Please Help!
Devin attempted to solve the inequality 2x+6>10 following the steps below: •subtract 6 from both sides of the inequality. •divide both sides of the inequality by 2. He finds that x>2. Clearly explain why this is not a correct solution. In your
asked by Nicole 
science
scientists often useto better see how something work? a) models b)data c) procedures d) hypothesis
asked by michelle 
Calculus
Find the derivative of each 1) y = e^x(Sin²x) 2) y = (x²+1)e^4 3) y = x²(e^Sinx)
asked by Julie 
calculus
A rancher wants to fence in an area of 3000000 square feet in a rectangular field and then divide it in half with a fence down the middle, parallel to one side. Length of fence:______ feet *obviously I'm bad at word problems but that's why I'm trying to
asked by casidhe 
Calculus
A smoke detector contains 0.2 mg of Americium 241 (Am241), a radioactive element that decays in t years according to the relation m = 0.2(0.5)^(t/432.2). Where m is the mass, in milligrams, remaining after t years. A) The smoke detector will no longer
asked by Julie 
MATH
What Is Three Half Of 2/6/7 ? Pleasee Help !
asked by KIM