Questions Asked on
March 25, 2012

Math
A ball is thrown vertically upward with an initial velocity of 96 feet per second. The distance s (in feet) of the ball from the ground after t seconds is s(t)=96t16t^2 a.) at what time will the ball strike the ground b.) for what time t is the ball more
asked by danielle 
precal PLEASE HELP!
secx/secxtanx=sec^2x+ secx+tanx
asked by olivia 
Chemistry
The reaction: H2PO4 + HAsO42 > HPO4 + H2AsO4 Which one of the sets above lists both of the base species involved in the equilibrium? I'm confused and couldn't identify the conjugate acids and bases properly. Could Dr.Bob explain abt this problem ?
asked by Swaastikaa 
Chemistry
Write the aciddissociation reaction of nitrous acid (HNO2) and its acidity constant expression.
asked by Lisa 
chemistry electrochemical cell
What makes this an oxidationreaction? 3Ag2S+2Al(s) > Al2S3+6 Ag(s)? Write the halfreactions showing the oxidation and reduction reactions. Identify which is the oxidation reaction and which is the reduction reason. What is oxidized in the reaction? What
asked by princess 
Physics
A 60kg front seat passenger in a car moving initially with a speed of 18m/s (40 MPH) is brought to rest by an air bag in a time of 0.4s a. What is the impulse acting on the passenger? b.What is the average force acting on the passenger in this process?
asked by Karien 
statistics
The number of pizzas consumed per month by university students is normally distributed with a mean of 9 and a standard deviation of 5. What is the probability that in a random sample of size 10, a total of more than 80 pizzas are consumed? (Hint: What is
asked by Lucy 
statistics
A person can order a new car with a choice of 9 possible colors, with or without ac, with or without heated seats, with it without anti lock breaks, with or without power windows and with or without a CD player. How many different ways can a new car be
asked by Sabrina 
physics
A train is moving parallel to a highway with a constant speed of 16.0 m/s. A car is traveling in the same direction as the train with a speed of 36.0 m/s. The car horn sounds at a frequency of 504 Hz, and the train whistle sounds at a frequency of 314 Hz.
asked by Anonymous 
spanish
Yo ______ lavo ______ manos y ______ cara. ______ cepillo ______ dientes y ______ cepillo ______ pelo. Yo ______ pongo ______ ropa.
asked by jack 
college physics
A 0.50kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.85 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.103. The block
asked by jerry 
Chemistry
How do you prepare a 0.4 M soultion of copper sulfate in water starting with solid copper sulfate and water?
asked by Amanda 
physics
A 3.00x10^3 kg lead bullet enters a target with a speed of 2.00x10^2 m/s and comes to rest within the target. Calculate the rise in temperature of the bullet assuming that 80.0% of the heat produced is absorbed by the bullet. The Specific heat of lead is
asked by Elizabeth 
personal finance
Alison's car is valued at $14,000, and she owes $12,000 on it. What is her current equity?
asked by Lamar 
Statistics
Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of 93.2 minutes per computer. Assume that o is known to be 16.9 minutes. Find a 99% confidence interval for the
asked by Jasmine 
Physics
A rifle with a mass of 1.2 kg fires a bullet with a mass of 6.0 (0.006kg). The bullet moves with a muzzle velocity of 600 m/s after the rifle is fired. a. What is the momentum of the bullet after the rifle is fired? b. If external forces acting on the
asked by Jeremiah 
Biology
When you measure your heart rate for less than 20 seconds , why is it less possible for the results to be reliable? When you measure your heart rate for more than 20 seconds, why is it still less possible for the results to be reliable?
asked by Shaman 
physics
A 4.5 cm tall object is placed 20 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.5 cm tall. (a) What type of mirror should be used? concave mirror convex mirror (b) Where is the image located? (Your answer
asked by Tom 
chemistry
If all the energy obtained from burning 1.23 pounds of propane (fuel value is 11.09 kcal/g) is used to heat 125.0 kg of water at an initial temperature of 21.8 °C, what is the final temperature? Hint: The heat, q, released by burning propane is absorbed
asked by Yasha 
Calculus
A function f is defined on the interval [0,4], and its derivative is e^sinx2cos3x a. on what interval is f increasing? b. at what value(s) of x does f have a local maxima? c. how many points of inflection does f have? *calculator is allowed for this
asked by Anonymous 
Math
A function f is defined on the interval [0,4], and its derivative is e^sinx2cos3x a. on what interval is f increasing? b. at what value(s) of x does f have a local maxima? c. how many points of inflection does f have? *calculator is allowed for this
asked by Anonymous 
calculus
A searchlight rotates at a rate of 4 revolutions per minute. The beam hits a wall located 9 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and
asked by Anonymous 
chemistry
Suppose that you place exactly 100 bacteria into a flask containing nutrients for the bacteria and that you find the following data at 37 °C: TIme (s) number of bacteria 0 100 19 200 38 400 57 800 76 1600 what is the rate order? What is rate constant? how
asked by HELP PLEASE 
Statistics
The average annual salary of employees at Wintertime Sports was $28,750 last year. This year the company opened another store. Suppose a random sample of 18 employees had an average annual salary of $25,810 with standard deviation of s = $4230. Use a 1%
asked by Jasmine 
math
Amy has a cube numbered 1 through 6. If she rolls the cube 30 times, how many times can she expect to roll a multiple of 3?
asked by stumped 
Physics
Tom the train and Dan are involved in an elastic collision. A 2.5 kg Tom is, at rest but is approached headon by a 5.0 kg Dan moving at 0.60 m/s. The forceseparation graph for the ensuing collision is given: the picture of the graph is found here:
asked by Nick 
Statistics
How long does it take to have food delivered? A Chinese restaurant advertises that the mean delivery will be no more than 30` minutes. A random sample of delivery times is shown below. Based on this sample data, is the mean delivery time different than 30
asked by Jasmine 
Calculus
Given the function f(x)= e^2x(x^22) a. does the decreasing arc reach a local or global minimum? b. does f have a global max?
asked by Anonymous 
Math
Given the function f(x)= e^2x(x^22) a. does the decreasing arc reach a local or global minimum? b. does f have a global max?
asked by Anonymous 
Statistics
Mr. Crandall has assigned a term paper due at the end of the semester. He would like to know the average length of the papers. The data below are the he numbers of types pages from a random sample of 10 term papers. Use these data to compute a 95%
asked by Jasmine 
calculus
1. A solid is constructed so that it has a circular base of radius r centimeters and every plane section perpendicular to a certain diameter of the base is a square, with a side of the square being a chord of the circle. a. Find the volume of the solid. b.
asked by Yuri 
Finance
A 20year, $1,000 par value bond has a 9% annual coupon. The bond currently sells for $925. If the yield to maturity remains at its current rate, what will the price be 5 years from now
asked by Lola 
physics
According to newtons 1st law , construction workers are warned not to leave their hard hats on the rear window ledge of their cars, explain why?
asked by Melissa 
Algebra
A movie theater manager wants to know how many adults and how many children pay admission to a particular movie. The theater charges $10.00 for adult tickets and $5.00 for child tickets. At a showing where 210 tickets were sold the theater collected
asked by Katy 
chemistry
The solubility products of AgBr and Ag3PO4 are 5.0 1013 and 1.8 1018, respectively. If Ag+ is added (without changing the volume) to 1.00 L of a solution containing 0.31 mol Br ‾ and 0.31 mol PO43, calculate the molarity of Ag+ ions required to
asked by Tanner 
Physics
A bucket of water with a mass of 4.0 kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 8.0 kg and is mounted horizontally on frictionless bearings. The bucket is released from rest. (a) Find its speed after it has fallen
asked by Priyanka 
criminal justice
Options Menu: Forum Topic: Interpreting the U.S. Constitution Consider the following scenario: The Supreme Court interprets the U.S. Constitution. Thomas Jefferson once argued against the doctrine of judicial review. He believed in the principles of
asked by Lisa 
Physics
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95 km/h?
asked by Kristina 
Algebra 2
The concentration of hydrogen ions in a batch of homemade ketchup is 104,. What is the pH level of the ketchup?
asked by Mary 
Physics
At a city park, a person throws some bread into a duck pond. Two 4.00kg ducks and a 9.00kg goose paddle rapidly toward the bread, as shown in our sketch (Intro 1 figure) . If the ducks swim at 1.10 m/s, and the goose swims with a speed of 1.30 m/s, the
asked by William 
Statistics
Long term experience showed that after a type of eye surgery, recovery time has a mean of u = 5.3 days in a hospital. A random sample of 40 patients, with this type of eye surgery, were treated as outpatients during recovery and the sample mean recovery
asked by Jasmine 
chemistrybalanced redox equations
Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au a. Write the oxidation and reduction halfreactions. Make sure each halfreaction is balanced for number of atoms and charge b. Multiply each halfreaction by the correct
asked by princess 
physics
A jet plane pilot decides to accelerate horizontally. If the thrust of the engine is increased to 50 000 N at a time when the air resistance ( or drag) acting on the 4000kg plane amounts to 30 000 N , what will the planes acceleration be I believe you at
asked by Melissa 
physics
A 1.75kg wooden block rests on a table over a large hole as in the figure below. A 4.60g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum
asked by jeezy 
Statistics
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term mean daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of $25,910. Does this indicate
asked by Jasmine 
physics
A woman pushes a refrigerator across the floor at a steady speed of 20cm/s . If she has to push with a horizontal force of 400 N to keep it moving , is the force of friction less than 400 N , 400 N, more than 400 N, why
asked by Melissa 
Chemistry
What volume of hydrogen gas measured at 27celcius and 723 torr may be prepared by the reaction of 8.88 grams of gallium with an excess of hydrochloric acid? Ga+ HCl ==> GaCl3 + H2
asked by Anonymous 
Spanish
Fill in the blank. 1. Los amigos están viajando por un país europeo. Los amigos están viajando por _____________________. 2. Están haciendo un viaje que no cuesta mucho. Están haciendo un viaje _______________. 3. Lo están pasando muy bien. Se
asked by Ren 
chemistry
Many reaction involving heterogeneous catalysts are zeroth order, that is rate=k. An example is the decomposition of phosphine (PH3) over tungsten (w): 4Ph3> P4 + 6H2 It is found That the reaction is independent of PH3. As lon 1 g as phosphine's
asked by court 
chemistry
how much aluminum oxide is needed to produce 1 kg of aluminum?
asked by jupta 
science
Which of the following would most likely cause rising air? A warm air and low pressure B cold air and low pressure C warm air and high pressure D cold air and high pressure Please give us the answer.
asked by miki 
physics
When the crampton coalfired train engine was built in 1852 , its mass was 48.3t ( 1.0 t= 1.0*10^3) and its force capability was rated at 22.4 kN. Assuming it was pulling train cars whose total mass doubled its own was and the total friction on the engine
asked by Melissa 
ap physics
A 650N man jumps out of a window into a fire net 8m below. The net stretches 1.5m before bringing the man to rest and tossing him back into the air. What is the maximum potential energy of the net compared to its unstretched potential energy?
asked by Stephen 
precal
1/tanxsecx+ 1/tanx+secx=2tanx so this is what I did: =tanx+secx+tanxsecx =(sinx/cosx)+ (1/cosx)+(sinx/cosx)(1/cosx) =sinx/cosx+ sinx /cosx= 2tanxI but I know this can't be correct because what I did doesn't end as a negatvie:( please help
asked by olivia 
Statistics
A random sample of 14 evenings at the O'Sullivan house hold showed that the family received an average of 2.4 solicitation calls each evening. The sample standard deviation was s= 0.9. Find a 99% confidence interval for the population mean number of
asked by Jasmine 
Physics
trap door of length and width 1.65 m is held open at an angle of 65.0 degree with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly to the
asked by Lorax 
Math
Maya bought a car for $15,000. To pay for it, she took a bank addon interest loan at an annual interest rate of 9%. The loan term is 5 years. How much interest will she pay and what are her monthly payments?
asked by Dee 
Chemistry
use the Ksp of SnS2= 1.0X10^70 and calculate the pH of a hydrogen sulfide solution needed to precipitate 99.99% of the tin(IV) ion assuming [Sn^4+]=0.05M and that [H2S]=0.10M.
asked by Tanner 
Physics
A convex mirror forms an image of height of 2.4 cm, If the radius of curvature of thr mirror is 40 cm, find the heihgt and distance of the object from the mirror.
asked by Lafix erassy 
Physics
A playground merrygoround made in the shape of a solid disk, has a diameter of 2.63 m and a mass of 353.9 kg. Two children, each of mass 30.5 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses. (a) What torque
asked by Adam 
Chemistry
help...If exactly 5.0 mL of HNO3 will neutralize 15 mL of 2.0 M NaOH, what is the molarity of the HNO3 solution? Have no idea what to do. thank you.
asked by Brad 
English
. In which one of the following sentences ia an abbreviation used correctly? A. I had to go to the Dr. on Monday B. Martin is a member of Parents for Responsible Teens (PRT) C. His birthday is Sept 28. D. Keep the bandage on for at least 3 hrs. Answer (b)
asked by Brenna 
physics
A 1200 kg boat accelerates steadily at 0.05 m/s^2 in a straight line . Are the forces on this boat balanced or unbalanced?
asked by Melissa 
child psychology
which young adult is at risk of longterm identity foreclosure or diffusion A.An aspiring chef who has no ooportunity for culinary training. B. A peace corps volunteer.
asked by sarah 
chemistry
2 A 0.310 M solution of a weak acid, HX, has a pH of 2.53 a. Find the [H+] and the percent ionization of nitrous acid in this solution. b. Write the equilibrium expression and calculate the value of Ka for the weak acid. c. Calculate the pH of the
asked by bob 
physics
How much applied force is needed to accelerate a 2.0 kg block of wood at 4.0m/s^2 along a rough table, against a 10 N force of friction?
asked by Melissa 
Physics
In the dangerous "sport" of bungeejumping, a daring student jumps from a balloon with a specially designed elastic cord attached to his waist, as shown in Figure P5.77. The unstretched length of the cord is 25.0 m, the student weighs 675 N, and the
asked by andrew 
calculus
4. A particle starts at the point (5, 0) at t = 0 and moves along the xaxis in such a way that at time t > 0 the velocity is given by v(t)=t/(1+t^2) a. Determine the maximum velocity attained by the particle. Justify your answer. b. Determine the position
asked by Tiffany 
chemistry
The activation energy for the decomposition reaction, 2 HI> H2 + Hi Is 186 kj/mol. The rate at 555 k is 3.2 x 10 7L/mol. Sec. What is the rate at 645 k
asked by court 
chem
Butadiene can undergo the following reaction To form a dimer(two butadiene molecules hooked together). 2c4h8>c8h12. The half life for the reaction at a given temperature is 5.92x102 sec. The reaction kinetics are second order. 1. If the initial
asked by court 
physics
Find the number of atoms in a gold ring of mass 6.43 g.
asked by cindy 
Algebra
Alice travels 6 times faster than Bill. Traveling in opposite directions, they are 714 miles apart after 6 hours. Find their rates of travel.
asked by Shannon 
COLLEGE ALGEBRA
An investment of $63,000 was made by a business club. The investment was split into three parts and lasted one year. The first part of the investment earned 8% interest, the second 6% and the third 9%. Total interest from the investments was $4950. The
asked by AMBER 
physics
A jet plane is traveling at a constant speed in a straight line in level speed. What does this tell you about the forces acting on it, what forces are acting on it .
asked by Melissa 
Physics
A 15 kg child stands on the edge of a small merrygoround of radius 2.0 m. If the merrygo round turns at a steady rate of 11 rpm, calculate the magnitude and direction of the net force on the child.
asked by Kristina 
Chemistry
I don't get this at all. A beaker with 105mL of an acetic acid buffer with a pH of 5.00 is sitting on a bench top. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.40 mL of a 0.470 M HCl solution to the beaker. How
asked by Amanda 
Physics
(a) A 2.20 cm high insect is 1.24 m from a 135 mm focallength lens. What is the image distance? mm How high is the image? cm What type is it? (Select all that apply.) The image is upright. The image is inverted. The image is behind the lens. The image is
asked by Anna 
chemistry
Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit.
asked by Tanner 
Statistics
A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident that the sample
asked by Jasmine 
precal
(1/tanxsecx))+(1/(tanx+secx))=2tanx
asked by olivia 
Chemistry
Consider the HF solution with the concentration 5%(w/v). Calculate its concentration in the molarity. Use four significant figures in the answer.
asked by Lisa 
physics
a person attaches a 25kg hay bale to one end of a rope passing over a frictionless pulley connected to a beam in the hay barn. another person then pulls down on the opposite end of the rope with a force of 277N Ignoring the mass of the rope what will be
asked by Kelsey 
Algebra
A ball is thrown up with an initial velocity of 32 feet per second. How many seconds will it take for the ball to return to the ground using the formula h=vt16t^2?
asked by Zach 
Chemistry
The following system is at equilibrium,at 699K in a 5L container. H2(g)+I2(g)>2HI(g) Kc = 54.9 Initially,the system had 2.50 moles of HI.What is the moles of H2 at equilibrium? Can Dr.Bob check if my steps are correct? My solution: Initially,the
asked by Swaastikaa 
statistics
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
asked by Lea Kellogg 
algebra
you can paint a room in 8 hours. your friend and you can paint a room in 5 hours together. how long does it take your friend alone?
asked by Anonymous 
physics
A bug that has a mass mb = 1 g walks from the center to the edge of a disk that is freely turning at 38 rpm. The disk has a mass of md = 11 g. If the radius of the disk is R = 30 cm, what is the new rate of spinning in rpm?
asked by katie 
Physics
A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 90.0°. (a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through
asked by Adam 
Algebra
Mark made a business trip of 290 miles. He averaged 56 mph for the first part of the trip and 60 mph for the second part. If the trip took 5 hours, how long did he travel at each rate?
asked by Shannon 
Chemistry
Calculate the concentration of the hydronium ion([H3Ol+]) for a solution with the pH = 4.5
asked by Lisa 
Physics
trap door of length and width 1.65 m is held open at an angle of 65.0 degree with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly to the
asked by Lorax 
Geometry
Which of the following can be used to describe the triangle with the vertices listed below? F(1, 1), G(8, 1), H(9, 10) I. acute II. obtuse III. right IV. scalene V. isosceles VI. equilateral Please show me how you got the answer
asked by monique 
chemistry
Both Fe2+ and Cd2+ are precipitated by sulfide. However, they can be quantitatively separated through pH adjustment. You are given a solution containing 0.086 M Fe2+ and 0.062 M Cd2+. Calculate the [H+] range for a saturated H2S solution (ie, [H2S]=0.10 M)
asked by Tanner 
chemistry
A 600ml sample of a saturated solution of MgCO3 is reduced to 125 ml by evaporation. What mass of MgCo3 is formed? Ksp=4*10^5
asked by maureen 
Algebra
Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth. y=2+7x 10x7y=209
asked by Katy 
Algebra
If 3 is subtracted from the numerator of a certain fraction, the value becomes 2/3. If 10 is added to the denominator of the original fraction, the value becomes 1/2. Find the original fraction. Solve the problems by using 2 variables HOW DO I START THIS
asked by BIBIN 
accounting
Part 5 Cash Budgeting Landis Company has the following sales forecasts for the selected threemonth period in the current year: Month Sales April $12,000 May 7,000 June 8,000 Seventy percent of sales are collected in the month of the sale, and the
asked by beth 
chemistry
How do I do a question like this please help and explain it!! Calculate the pH of a buffer solution that contains 0.22 M benzoic acid (C6H5CO2H) and 0.24 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 105 for benzoic acid] Round your answer to two places
asked by Brittany 
physics
Find the mass in grams of a carbon dioxide molecule.
asked by cindy 
Math
scientific notation 0.0000000005 5 x 10(9)
asked by Cathy 
physics
The force on a wire is a maximum of 6.00\times 10^{  2} {\rm{N}} when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the
asked by ben 
Chemistry
how do I find the pH of a buffer solution given that 0.010M NH3 mixed with 0.0030M NH4Cl. Also... a 0.010M HF solution is mixed with 0.030M KF. FIND THE pH of this mixed solution.
asked by Declan 
physics
When the crampton coalfired train engine was built in 1852 , its mass was 48.3t ( 1.0 t= 1.0*10^3) and its force capability was rated at 22.4 kN. Assuming it was pulling train cars whose total mass doubled its own was and the total friction on the engine
asked by Melissa 
calculus
1. Consider the function f(x) = X^(4/3) +4x^(1/3) on the interval 8 ≤ x ≤ 8. a. Find the coordinate of all points at which the tangent to the curve is a horizontal line. b. Find the coordinate s of all points at which the tangent to the curve is a
asked by Yuri 
Algebra
Josh and Racquel sold cookies and brownies at the math club bake sale. The cookies cost $0.47 each, and the brownies cost $0.60 each. They sold a total of 603 items (cookies and brownies) and raised $323.84 Write a system of equations and determine the
asked by Katy 
Calculus
If a(0,1,3)+b(1,1,1)c(1,2,5)=(2,3,8), determine a,b,c Is this the correct answer: a= 4, b= 3, c= 1?
asked by Melinda 
algebra
If a gardener can mow a lawn in 25 min, what portion of the lawn can the gardener mow in 1 min?
asked by Anonymous 
Chem 111
A solution is prepared by mixing 499 mL of 0.19 M Tris·Base and 592 mL of 0.37 M Tris·Acid. What is the pH of this solution? [Ka(Tris·Acid) = 8.5 × 109] Round your answer to two places past the decimal. I can do basic pH questions but I am at a loss
asked by Brittany 
geometry
During the halftime show of a football game, a trumpet player and a tuba player start at the same position on the field. The trumpet player then marches 74.8 ft directly toward the goal line, and the tuba player marches directly toward the sideline. At
asked by monique 
calculus
1. Consider the function f(x) = X^(4/3) +4x^(1/3) on the interval 8 ≤ x ≤ 8. a. Find the coordinate of all points at which the tangent to the curve is a horizontal line. b. Find the coordinate s of all points at which the tangent to the curve is a
asked by Yuri 
Math
What positive value of b makes 9^2bx+4 a perfect square trinomial? How would you solve this problem? Thanks
asked by Shadow 
TEC/401
HOW the internet policies of some countries may effect a company's ability to expand globally? Current and potential uses of technology for the global success of business objectives?
asked by CORRIE 
LANGUAGE
a) the singing of one's name _ _ _ _ ture b) the time to leave _ _ _ _ _ ture c) silly, not acting of one's age _ _ _ _ture I swear I found all of them except these three
asked by flower 
Chemistry
At equilibrium, it was found that [CH3COOH] = 0.8537 M, [CH3COO] = 0.0040 M, and [H3O+] = 0.0040 M. Calculate the acidity constant of CH3COOH and the pH value of the solution.  Please show how you solve the problem.
asked by Lisa 
Math
JJ's boat will go 15 mph in still water. If he can go 12 mph downstream in the same amount of time it takes to go 9 mph upstream, what is the speed of the current?
asked by Sarah 
physics
An 73kg bungee jumper is enjoying an afternoon of jumps. The jumper's first oscillation has an amplitude of 14 m and a period of 6 s. the spring constant of the bungee cord is 80.1 and max speed during oscillation is 14.7 m/s Treating the bungee cord as a
asked by hania 
ALGEBRA
In triangle ABC, the measure of angle B is 27 degrees more than three times the measure of angle A. The measure of angle C is 48 degrees more than the measure of angle A. Find the measure of each angle.
asked by PLEASE HELP 
physics
A 1kg mass (the blue mass) is connected to a 8kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1kg mass, and the rod and masses are free to rotate about this pivot
asked by hania 
English
When preparing a formal business presentation the phase that can make or break your report is the phase. A. writing B. outline C. revision D. organization Answer (c )
asked by Brenna 
AP Calc
If y=2x2 , what is the minimum value of the product xy? A. 16 B. 8 C. 4 D. 0 E. 2
asked by Yuri 
physics
The difference between energy radiated from the sun and energy radiated from the Earth has to do with ____________________. A) Neither of these.B) Both of these.C) radiation frequencies.D) the amounts of radiant energy.
asked by Kristie 
Socials
I have no idea how to answer this. Write a paragraph from Macdonald's point of view defending the decision you have made. Keep in mind your desire to look good politically and personally in your quest to get reelected. What decision did Macdonald make??
asked by Lou 
Physics
A helicopter winches up an injured person from a boat. The person plus equipment has a mass of 104 kg. If the height of the lift is 84 m and it is carried out at a uniform rate over 70 s, what is the power expended by the helicopter's winch motor? Assume
asked by Anonymous 
Physics
If you are wearing contact lenses with a dioptric power of 3.4 and your eye has a diameter of 2.6 cm, what is the effective focal length of your eyecontact lens combination, in centimeters?
asked by Morgan 
child psychology
Dean associates certain activites,roles, and traits as being typical for either males or females.His associations conform to cultural stereotypes and encompass many genderlinked responses.This is an example of gender: A.atypicality B.roles C.typing
asked by sarah 
Math
scientific notation 12,150,000,000 1.215 x 10(7)
asked by Cathy 
math problem
please help me solve if I open a book to two facing pages, the product of the page number is 342 what will the two page numbers be
asked by Lavern 
math
last week Ann ran 27 miles less than Jen. Ann ran 19 miles. How many miles did Jen run?
asked by rob 
fun facts
what are some fun facts on multitasking? if not that what are some websites to find good fun facts
asked by Samantha 
physics
The ocean level rises when global temperature rises, due to ____________________. A) Both of these.B) Neither of these.C) melting of ice caps at the poles.D) thermal expansion of water
asked by Kristie 
physics
The temperature at the bottom of Lake Tahoe in the Sierra Nevada Mountains of California is 4°C year round. In which country is water at the bottom of lakes normally higher than this? A) Russia.B) Great Britain.C) New Zealand.D) Tibet.E) Singapore.
asked by Kristie 
math
Bob finds that the cost of driving his truck is 92 cents per mile. Give a symbolic and graphical representation for a function f(x) that computes the cost in dollars of driving x miles. Assume 0
asked by Kate 
Living Environment
Tell whether each of the following substances that is filtered from the blood in the glomerulus is reabsorbed, excreted as part of the urine, or both
asked by BIBIN 
math
Which of the following situations cannot be represented by the integer 10? F a balloon rises 10 ft into the air G the stock market gains 10 points H the town lies 10 ft below sea level I Jon received a gift of $10
asked by Jennifer 
English
I need help writing a story using these words. Any Ideas? 1.impute (v) to attribute an action to particular person or group 2.incompatible (adj) opposed in nature, not able to live or work together 3.inconsequential (adj) unimportant, trivial
asked by Anonymous 
language arts
Is the comparative form of sadly....more sadly? and is the superlative form of sadly....most sadly? Thanks.
asked by Brandi 
Chemistry
I will do an experiment that includes 4 grams of aluminum hydroxide and iron (III) oxide mixture, where 75% of it is Al(OH)3, and 15 ml of water and 25 ml of 2M KOH will be added and then boiled so that the Al(OH)3 dissolves. It will be filtered and then
asked by Tiffany 
11th grade math
A farmer wants to fence in 60 000m^2 of land in a rectangular field along a straight road. The fencing that he plans to use along the road is $10 per meter and the fencing that he plans to use for the other three sides costs $5 per meter. a) How much of
asked by jenna 
human behavior at work
both philosophy and visions are somewhat hazy concepts.How can they be made clear to employees?why are philosophy and vision included as early elements in the organizational behavior system?give an example of an organizational vision that you have read
asked by wanda 
Chemistry
How many mL of 5.5 M KOH are needed to prepare 300 mL of 0.2 M KOH?
asked by Amanda 
MS. SUE OR ANYONE PLS. HELP ME..technical writing
please help me if this is correct i have made for my homework. instruction is below: As a customer service manager for a local software development company, you want to create a user manual for one of the software applications your company develops. The
asked by jessie 
science fair
in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write the procedure. i wrote the procedure now do i rewrite it for testing my hypothesis? or do i write something else
asked by Samantha 
Math
Find the pcent of decrease to the nearest whole percent? Was:25 Now:17. But i don't understand my teacher, please help me by doing an example.
asked by Losa 
Chem
Find pH. A) 0.10M Zn(OH)4^2 F) Zn(OH)2 in 0.010M ZnCl2 Q) 0.010 M Zn(NH3)4^+2 hint: fined [NH3] then kb for OH^ Im having trouble with these can someone help me.
asked by Alison 
Physics
A helicopter winches up an injured person from a boat. The person plus equipment has a mass of 104 kg. If the height of the lift is 84 m and it is carried out at a uniform rate over 70 s, what is the power expended by the helicopter's winch motor? Assume
asked by Anonymous 
chemistry
Methanol WHat is the chemical formula? What is the molecular formula?
asked by hedi 
network topology
what type of home network topology do you utilize? does the physical topology differ from its logical topology? if you do not have a homework, research a friends network and use that data in your response.
asked by sonny 
Physics
What is the wavelength of light (in nanometers, nm) emitted when the electron in a hydrogen atom moves from the n=5 energy level to the n=3 energy level?
asked by Morgan 
Guest
they'll tell you they love you and THAN/THEN just leave you.
asked by Than or Then? 
English
Writeacher, here are the sentences I urgently need you to check. 1)Though you are still a student, refer to the type of approach to work you may adopt when working. Would you work at a job, at a career, or at a passion? 2) Write at least five phrasal verbs
asked by Matthew 
Philosophy
Why did Hobbes name his text Leviathan?
asked by Karen 
Physics
Find the velocity of microwaves having wavelength of 0.75m and frequency 2.75X10^10hz
asked by +++++Tasha+++ 
calculus
Evaluate the integral ∫∫∫2xzdV bounded by Q. Where Q is the region enclosed by the planes x + y + z = 4, y = 3x, x = 0, and z = 0. Answer=16/15 Is this answer correct? cause i've tried doing this problem a bunch of ways and i never even get close to
asked by Brandon 
physics
A 1kg mass (the blue mass) is connected to a 9kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1kg mass, and the rod and masses are free to rotate about this pivot
asked by hania 
ALGEBRA
The perimeter of a triangle is 52 centimeters. The longest is 2 centimeters less than the sum of the other 2 sides. Twice the shortest side is 13 centimeters less than the longest side. Find the lengths of each side of the triangle. What are the lengths of
asked by PLEASE HELP 
English
I have starr test in the morning can somebody please explain what the difference between literary and expository writing
asked by Amanda 
biology
a class of pupils obtained results on a bar chart during a seashore investigation. they sampled the numbers of different seaweeds found in 0.25 m2 from the top shore (upper shore) to lower shore and found average percentage cover for each seaweed. describe
asked by jane 
science fair
in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write procedure. i wrote the procedure now do i rewrite it for testing my hypothesis?
asked by Samantha 
Math
(4.44e2  x) (8.06e2  x) / (0.331 + 2x)^2 = 1.80e2 I need to rearrange this equation so that I can get a,b, and c, for the quadratic equation but I am not sure how to do this. Thank you for the help. Math(Please answer, thank you)  bobpursley, Sunday,
asked by Hannah 
english
How can you resolve conflict whilst working in the community
asked by Lisa 
Physics
What is the total power, or radiant flux, (in megawatts) of a spherical object of temperature 873 K and radius 7 meters, if we assume that it radiates like a perfect blackbody? (To get an answer in megawatts, take your answer in watts and divide by a
asked by Morgan 
physics
What is evaporation,boiling,cryometer
asked by Emmanuel Timothy 
calculus
find F(x)' for x^3(3x)^4.. i think answer is 3x^2(3x)(33x)^4.. please help thanks
asked by Rochelle F 
English
Thank you very much. I left out a few sentences I'm unsure of. 1) My school is not close enough for me to walk there. My school is too far for me to walk there. (Shall I include there in both sentences). 2) I didn't have enough time to visit her yesterday.
asked by Matthew 
Geometry
A right triangle with G and F as the two base angles and E as the top angle. Side EF is Y, side FG is x, while side EG is 2x. If Y = 15, what is the value of x? Please help, and explain.
asked by monique 
PreCalculus
Find a polynomial function with integer coefficients with degree 4, one root 3+radical2, and another root 43i. I got x^414x^3+80x^2206x+175 I'm I correct?
asked by Cooper 
math
The space station is going 17500 mph as it orbits the earth. How long will it take to orbit 1 time if the earths diameter is 7926 miles and the space station orbits at 240 miles above the earth.
asked by Bob 
pharmacology
which is the least accurate system for measuring medicine?
asked by stephanie 
chemistry
using the following mechanism, determine the rate law. 2A B+C B+D > E 2A + D > C + E k=? please indicate which k you are using for which equation
asked by katie 
physics
A spool of thin wire pivots on a shaft with friction. The wire is pulled by a hanging mass M=1.50 kg. Upon starting from rest and falling a distance D=1.65 m, the mass has a speed V=2.00 m/s. Calculate the energy lost to friction during that time. Inner
asked by please help:) 
human behavior at work
examine the trends in the models of organizationalbehavior as they develop over a period of time. why have the trends moved in a positive direction?
asked by wanda 
Chemistry
I have 2 questions on columns used in the Gas ChromatographyFlame Ionisation Detector (GCFID) instrument:  1) If a capillary column is left in the GCFID instrument for 2 months with the instrument switched off (i.e. instrument is not in use),will this
asked by mandy 
Operations Management
Explain the key interactions among marketing, design, manufacturing, and finance in product development?
asked by Nicole 
Religon
Unscrable mastcrane
asked by Linda 
ENG227
Part One: Analytical Report on a Targeted Sales Letter Your supervisor has asked that you file a brief informal report (approx. 2 singlespaced pages, 500750 words, plus references) on the background of the company you have chosen to solicit with your
asked by geniaj 
Math
I'm stuck on my homework, and my parents don't know how to do expanded algorithm
asked by Nandi 
physics
Show your work for how the formula was used to calculate a final answer! GPE for second hill: ___ _________________++ Describe how conservation of energy applies to a roller coaster ride from start to finish. This is the last part of roller coaster I'd
asked by kevin 
English
In the book "Here lies Arthur", what does the lady of the lake give to Peredeur?
asked by Anonymous 
physics
1. Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is
asked by Kristie 
English
I am writing a paper and I was wondering does this sound like a good thesis? Cofer shows not only the crazyness women but also shows how men can be harsh.
asked by Annie 
general chem
A certain monoprotic weak acid with Ka = 0.49 can be used in various industrial processes. (a) What is the [H+] for a 0.191 M aqueous solution of this acid and (b) what is its pH? Round the [H+] to three significant figures and the pH to two places past
asked by Bri 
math
last week bre ran 28 miles more than heather. bre ran 35 miles. how many miles did heather run?
asked by rob 
reading
describ the settings of the text physically and socially and historically. fron the book the red scarf girl
asked by Amanda 
math pre calc
solve for x. 8^6+3x=16
asked by danielle 
Religion
What is a good way to define a totem pole?
asked by Rebecca 
Computer Science
I got part one but part 2 is confusing. Part1: Create a class called Person that has two subclasses Student and Employee. Make Faculty and Staff subclasses of Employee. A person has name and address. A student has GPA as a real number between 0.00 and
asked by Jacob 
physics
A cylinder of mass M=58 kg, radius R=1.3 m and moment of inertia I=(1/2)MR2 is initially rotating around its central axis with an angular velocity ωi= 1.8 rad/s. A tangential force F of constant magnitude applied to the edge of the cylinder during 5.9 s
asked by katie 
PSYCHOLOGY
Please help me understand. Explain boundary theory and provide an example.
asked by CHASEONE 
child psychology
I still need help with this question Which young adult is at risk of long term identity foreclosure or diffusion? A. A college graduate who switces majors B. An aspiring chef who has no opportunity for culinary training. C.A young woman with several
asked by sarah 
healthcare
What information should you share with others at workplace that promotes to aged care
asked by Lisa 
AIU
You are the lead human–computer interaction (HCI) engineer on a major defense project supporting the government and its integration of a new system and application design for use by federal investigators. Part of your job is to elicit and define the user
asked by ronald 
physics
If we were to find advanced life on a planet which orbited reasonably near to a star of temperature 30000 Kelvin, to what wavelength of radiation (measured in nanometers, nm) might we reasonably predict their eyes would be most sensitive?
asked by Morgan 
physics
Is their anyone that goes to CA homeschooling that can help with roller coaster portfolio?
asked by kevin 
LIFE ORIENTATION
IN 1015 LINES CRITICALLY DISCUSS 5 WAYS IN WHICH THE HUMAN OR ENVIRONMENTAL PROBLEM IMPACTS ON THE COMMUNITY.PROVIDE RELEVENT SOURCES TO SUPPORT YOUR CLAIMS.
asked by SAMUKELISIWE 
English
I am making a thesis statement on this topic. Jay Gatsby: Hero or Failure? Is Gatsby a heroic figure that can be idolized or is he a warning to the readers? Would this be a good thesis statement? While some people may view Gatsby as unsuccessful because of
asked by Rebecca 
Social studies
Why would the Chinese want to limit population growth?
asked by Jess 
English
I think in the last sentence I should vary "to learn of" and leave out "of"
asked by Matthew 
math
The diameter of each tire on Niki's bike is 66 centimeters (cm). It takes her 16 minutes to ride 10 kilometers (km). How fast did Niki ride, in kilometers per hour?
asked by jenna 
general chem
A certain monoprotic weak acid with Ka = 0.49 can be used in various industrial processes. (a) What is the [H+] for a 0.191 M aqueous solution of this acid and (b) what is its pH? Round the [H+] to three significant figures and the pH to two places past
asked by Bri 
maths
Please I want to know how many litres make a metric tone.
asked by grace 
science fair
in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write the procedure. i wrote the procedure now do i rewrite it for testing my hypothesis? or do i write something else
asked by Samantha 
English
Could you please check my sentences, please? Thank you, Writeacher. 1) You can't get out of it: you must confess that you have broken the vase. We were having dinner when the lights went out. 2) The teacher invited me to look up the unknown words in the
asked by Matthew 
calculus
need help simplifying some trig identities such as: (csc t) (sin t) cos t = 0.75 and tan t = 0.88, find sec t and cot t; (cot2t) (sin2t) + sin2 t; csc2t  cot2t/sin2t
asked by angelia 
Math
1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4  4e^x + 8 answer: 4(3x^3  e^x) b. y= (3 + 4e^x)^5 answer: 20e^x (3+ 4ex)^4 c. y= (e^x  1) / x^2 answer: (xe^x  2e^x +2) / x^3
asked by Helpplease check 
Business Studies
WHat are contemporary issues in businesses in Australia
asked by Anonymous 
algebra
x+y=38; xy=26x
asked by Susan 
math
23+43
asked by priya 
math
what is the absolute value of 6^2 would it be 36?
asked by jocelyn 
physics
If a more complicated atom has two energy levels for its electrons at (15) eV and (30.1) eV, what is the wavelength of the photon (in nm) that is emitted when an electron transitions between these two levels?
asked by Morgan 
Living Environment
Tell whether each of the following substances that is filtered from the blood in the glomerulus is absorbed, excreted as part of the urine, or both Water________________________________ amino acids_________________________ glucose____________________
asked by BIBIN 
Algebra
Two perpendicular lines with the equations y=1/3x+9 and y=mx3 contain consecutive sides of a rectangle. What is the value of m in the second equation?
asked by monique 
English
Thank you very much. Here are a few sentences I urgently need you to check. 1) I wish it hadn't rained so often. I wish they would stop arguing (with each other) 2) I wish she were here with me. If I had studied harder, I would/could/might have passed the
asked by Matthew 
Math
If events A and B are independent and P(A) and P(B) are nonzero, explain why P(A U B) does not equal P(A)+ P(B) im not sure how to answer this
asked by Diana 
PreCalculus
Sketch the graph f(x)=2x^2(x5)^3(x+2)^4. What would be my coordinates. I solved it and my graph looks nothing like the one on wolframalpha. Can someone show me how you would solve this?
asked by Cooper 
math problem
please help to solve find x intercept of f(x)4x+x(x1)=0
asked by Lavern 
Math
I have solved the following and I am writing just their answers with it, please let me know if these are correct. thanks 1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify y= (e^x  1) / x^2 answer: (xe^x 
asked by casey 
Italy
What is the officail website for Italy and it's sports?
asked by Joanne 
Civics
Do you think that it would be easy or hard to convict someone of treason and why?
asked by Carmen 
math
How do I calculate the present value on a deferred annuity for $75,000 for 3 years at an interest rate of 7%.
asked by cathyj 
ps 189
if a aluminum can has a radius of 10cm and a height of 20 cm. how many square cm of aluminum does it take to make such a can.
asked by sam 
Criminal Justice
If judicial review were eliminated, what alternative means could be used to interpret the meaning of the Constitution?
asked by Lisa 
precal
1cosx/1+cosx=(cotxcscx)^2
asked by olivia 
social studies
How were religion and the Roman government related?
asked by misty 
English
Writeacher, I'm still working on my paragraph on the presentation of the Irish school. I really hope you'll be there in three hours' time to check if everything is OK. By the way, can you suggest a website, on which (?) phrasal verbs are grouped according
asked by Matthew 
Math 8
6 1/2 joules. particles looses 0.08 joule of energy every 15 seconds what will energy after 4 minutes. Would this be 6 1/2  1.28 divide by 4
asked by Chris 
science
a 2000 kg sedan is traveling west at 25m/s. How would the sedan's momentum change if it slowed down to 10 m/s?
asked by joe 
Pre Cal
cos^2+tan^2=1
asked by Trevion 
PreCalculus
Sketch the graph f(x)=2x^2(x5)^3(x+2)^4. What would be my coordinates. I solved it and my graph looks nothing like the one on wolframalpha. Can someone show me how you would solve this?
asked by Cooper 
Math
What are the values of x for 2x1=0
asked by Labz 
math
find x when f(x)=1 f(x)= x^2+x12/x^24
asked by danielle 
Math
Finding the base or number : 9 is 15% of what number? example please.
asked by Losa 
Geometry
two perpendicular lines with the equations y=1/3x+9 and y=mx3 contain the consecutive sides of a rectangle. What is the value of mx in the 2nd linear question.
asked by monique 
healthcare
how can you review and develop your work performance at aged care
asked by Lisa 
Criminal Justice
Should judicial review be eliminated? Provide a detailed explanation for your answer.
asked by Lisa 
Calculus AP need help!
antiderivative. find f. f'(x)= 3x^(2), f(1)=f(1)=0
asked by MILY 
math
2cos^2a*cos^2b+2sin^2asin^2b1=cos2acos2b how to prove it,please help me
asked by A.L 
Derivatives
differentiate and simplify y= (e^x  1) / x^2
asked by help 
science
2 mole jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
asked by Anonymous 
Science
What does a thermohygrometer do?
asked by anne 
Math
How do you do $1.00 for 6 lemons ?
asked by Brandon 
Math 8
how do you dilate a figure under 1
asked by Chris