# Posts by Robert

Total # Posts: 1,011

statistics
If there were 10 distribution centers that have an output mean of 78 (in thousands), median of 65 and mode of 50, what would be the total output of the distribution centers?

Physics
A 0.350-kg ball is dropped from rest at a point 1.10 m above the floor. The ball rebounds straight upward to a height of 0.420 m. Taking the negative direction to be downward, what is the impulse of the net force applied to the ball during the collision with the floor?

physics
A 3.4-kg box is released on a horizontal surface with an initial speed of 4.8 m/s. It moves on the surface with a deceleration of 0.45 m/s2. Calculate the kinetic friction force on the box.

ALgebra
Indicate and explain the logical error in the following set of algebraic expressions Let a=b square both sides to get a^2=b^2 a^2=b*b Since a=b, then a^2=a*b Subtract b^2 from both sides a^2-b^2=a*b-b^2 Factor both sides: (a+b)(a-b)=b(a-b) Divide both sides by (a-b) (a+b)=b ...

Physics
A box is being pushed up the ramp by you at a 15 degree angle. The coefficient of kinetic friction between the box and ramp is .4. The box has a mass of 12 kg and you are pushing up the ramp with a force of 95N. What is the kinetic frictional force? What is the sum of forces (...

english 9
which paragraph of the article best supports the authors argument against clear cutting?

World geography
This very southern city in Africa is in an area of moderate rainfall

English Comp. I
Exercise 32.4 Please help with this assignment. I'm having trouble with it. Rive to clarify pronoun reference. Most can be revised in many ways. If a pronoun refers ambiguously to more than one possible antecedent, revise the sentence to reflect each possible meaning. 1. ...

English Comp. I
Exercise 32.4 Please help with this assignment. I'm having trouble with it. Rive to clarify pronoun reference. Most can be revised in many ways. If a pronoun refers ambiguously to more than one possible antecedent, revise the sentence to reflect each possible meaning. 1. ...

precalculus
Simplify the Factorial Expression. (3n+1)!*3!/(3n-2)!

precalc
Write the partial fraction decomposition of the rational expression. 6x^2+1/x^2(x-1)^2

precalc/trig
Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)

chemistry
How much energy is required to heat 120.0g of water from 2.0°c to 24.0°c (Cp of H2O=4.184J/g

Calculus
If f(x) and g(x) are differentiable and lim(x->a) f(x)/g(x) exists, does it follow that lim(x->a) f '(x)/g'(x) exists (a converse to l'Hopital's Rule)?

Mathematic
. The number of vibrations per second made when a stretched wire is plucked varies directly as the square root of the tension in the wire and inversely as the length. If a 1.23 m long wire will vibrate 325 times each second when the tension is 115 N, determine the number of ...

math
f(x)=-8xlnx decreases over what domain

calculus
dang it. well the diagram was what my teacher gave me to go by. the 81 is the diagonals on both sides, or that's the way its written on the sheet of paper. and 8 is the length of the base.

calculus
a trapezoid is a quadrilateral with (only) two sides (called bases) that are parallel. an isosceles trapezoid has two equal legs. the area of a trapezoid is A=(1/2)*h*(b1+b2) where b1 and b2 are the two parallel bases and h is the altitude. your problem: a water viaduct has a ...

calculus
a fence 8 ft tall stands on level ground and runs parallel to a tall building. if the fence is 1 ft from the building, find the length of the shortest ladder that will extend from the ground over the fence to the wall of the building. (hint #1: if L represents the length of ...

calculus
a farmer has a 2040 ft of fencing and wishes to fence off two separate fields. one of the fields is to be a rectangle with the length twise as long os the width. while the other field is to be square. determine the dimension of the fields if the farmer wishes to maximize the ...

phyics
A novice golfer on the green takes three strokes to sink the ball. The successive dis- placements are 5.9 m to the north, 10 m 45  north of east, and 5.9 m 26 west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole in a single ...

algebra
Re-write with a rational exponent and simplify. ^3 sqrt:22

algebra
Find the varition constant and an equation where y varies directly as x=16 where x=8

math
find an equation of the tangent line to the curve at the given point: y=sqrt(1+x^3), (2,3)

Chemistry
Our class did an expeiment of adding sodium carbonate and calcium chloride. The experiment only yielded 28% of the calculated yield. The class did the experiment as a group (there are only 4 students in our class) and the experiment was closely supervised by our teacher to ...

Chem
64----> 32---> 16----->8 1 2 3 There are 3 half life. Divide 42/3 = 14 days

Algebra
yo momma

physics
A dog with a mass of 15kg jumps forward at 0.50m/s to catch a frisbee coming in the opposite direction at 5m/s. the dog catches the frisbee in its mouth and in doing so its velocity drops to 0.45m/s. What was the mass of the frisbee?

Math Help
yes it is, as: w^2-13w+42=0 (w-7)(w-6)=0

math
what is 33% of 61

math
5 items = a mean of 98 6 items =mean of 102 possible anwers 25,24,117,122 please show how to do

accounting
Ayres Services acquired an asset for \$80 million in 2011. The asset is depreciated for financial reporting purposes over four years on a straight-line basis (no residual value). For tax purposes the asset's cost is depreciated by MACRS. The enacted tax rate is 40%. Amounts...

chemistry 1025
a shoe box measures 12.0 inches by 5.5 inches by 3.5 inches. calculate its volume in cubic centimeters.

physics
Carol is correct. I just had this problem on my online test.

math
If Jill climbed 100 feet more, how many feet above sea level would she be?

Math
10 ways to make .50 only using quarters, nickles and dimes?

Math
0.810g/mL-1.375g/mL-2.046g/mL are these numbers precise or accurate or both?

Math
3. A processor makes two components, A and B, which are then packaged together as the final product (each product sold contains one A and one B). The processor can do only one component at a time: either it can make As or it can make Bs. There is a setup time when switching ...

geometry
4x + 7 = 5x - 4

Psychology
compare and contrast the strengths and weaknesses of two different approaches to study the following issue: You have developed a new drug that you believe is effective in reducing appetite. As a result of some preliminary research, you have been given a small grant to design ...

ALGEBRA
what does the F and g mean at the beginning of any function

algebra
g(x)=10/x+7 what this things domain

Math
The formula h=48t-16t^2 gives the height, h, in feet, of an object projected into the air after t seconds. If an object is propelled upward, at what time(s) will it reach a height of 32 feet above the ground?

Business
What types of technology do people utilize to communicate? How does technology change the way people communicate? What does technology bring to communication other than the technology itself?

Business Communication
The way business communication is conducted [Passive voice] in the workplace experiences regular changes with the advances in technology that makes communication faster and easier.

calculus
this is a optimization problem A construction company has been offered a contract for \$7.8 million to construct and operate a trucking route for five years to transport ore from a mine site to a smelter. The smelter is located on a major highway, and the mine is 3 km into a ...

Chemistry
Ethanol, C2H5OH or C2H6O, is mixed with gasoline and sold as gasohol. Given the following thermo-chemical reaction, calculate the kilograms (kg) of CO2 produced when enough ethanol is combusted to provide (or give off) 369 kJ of heat: C2H5OH (l) + 3 O2 (g) --> 2 CO2 (g) +3 ...

physics
Suppose 2 balls of same mass are held by 4 ropes, 2 for each ball. One ball is held by 2 ropes fastened at same height to something and the other at different heights. If the angles made by each respective pair of ropes(eg. right to right) are equal, are tensions in each ...

Math
Solve: sin2xsinx - cos2xcosx = 1, x domain [-pi, pi].

geometry
Find side c if side a = 10 inches and side b = 6 inches.

Math
If Brad invests \$2700 in an account paying 11% compounded quarterly. How much is in the account after 6 months?

math
1/3x+5(12-x)=2x what would "x" equal? how did you solve it?

math
1/3x+5(12-x)=2x

math
Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not?

Statistics
There is no choices

Statistics
Suppose I reported the length f a book shelf to be 2.12 meters. What range would you expect the actual length of the bookshelf to lie in?

Calculus
What is the antiderivative of the cube root of (x^2)+2

Calculus
What is the antiderivative of the cube root of (x^2)+2

finance
Simple interest

physics hw
A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m. b. What is the normal force acting on the car at the top of the hill? c. Assume that the car is at the intersection of the radius and the hill and that a ...

math
Amy has \$200 less invested at 9% than she does at 6.5%. If the annual return from the two investments is the same, how much is invested at each rate?

SCIENCE
DEFINE AND GIVE EXAMPLES 1. Sexual reproduction 2. asexual reproduction

SQL
Thank you sir:)

SQL
MrMath, please do not post aany answers to this question. My daughter, thinking she would help me with hoemwork posted this. I appreciate your time but do not need any assistance as I have a good understanding of the material. I have asked the site to delete this post. Sorry ...

SQL
1- A SQL statement is needed to create a stored procedure that has one input parameter of data type int. The stored proc selects the supplierId field and the total, or sum, of all Count field values for each group of supplierId fields from the Part table. The Part table was ...

Inorganic Chem
If you forget to add phenolphthalein solution to a vinegar solution(after adding NaOH solution), how might you salvage the titration?

Science/Math
A STONE MEASURED 25KG WAS ACTULLAY 20 KG WHAT WAS THE PERCENT DEVIATION OF THIS MEASURMENT

SCI207:Dependence of Man on the Environment
A farmer planted a field of BT 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000 kernels on average. ...

physics
A ball is rolling in a straight line at a constant speed. Another ball is motionless. what do they have in common?

Chem
1-No 2-No 3-Yes 4-Yes 5-Yes

chemistry
a 20.0-L vessel at 700 K initially contains HI (g) at a pressure of 6.20 atm;at equilibrium, it is found that the partial pressure of H2 (g) is .600 atm. What is the partial pressure of HI (g) at equilibrium?

Physics
a 2 kg block slides down a frictionless incline from point A to point B. A force(magnitude P=3N) acts on the block between A and B, as shown. Points A and B are 2 m apart. If the kinetic energy of the block at A is 10 J, and the work done by gravity is 20J, what is the KE of ...

Physics
A 305 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done by the ...

social studies
social studies

Health
This site looks not bad, but I personally not like this blood pressure chart. It hard to understand, and i using mostly bloodpressuremagazine[dot]com to check my blood pressure readings. It nice what all in one place, like normal blood pressure and hypertension.

Math
An NFL punter at the 15-yard line kicks a football with an initial velocity of 95 feet per second at an angle of elevation of 28 degrees. Let (t) be the elapsed time since the football is kicked. a. Write the parametric equations of this problem. b. With (t)=0 at the time of ...

chemistry
how many grams of manganese (4) oxide are needed to make 5.6 liters of a 2.1 solution

Physics concept question
solved it.

Physics concept question
A long straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the right at a distance 4.50 m above the wire at constant speed v = 2250 m/s. What are the magnitude and the direction of the magnetic force on the charge? h t tp:// ...

Physics - Current Loop
Solved it.

Physics - Current Loop
A current loop in a motor has an area of 0.85 cm^2. It carries a 240 mA current in a uniform field of 0.62 T. What is the magnitude of the maximum torque on the current loop?

Physics- Charge in electromagnetic field
Solved it. Thanks.

Physics- Charge in electromagnetic field
An antiproton (which has the same properties as a proton except that its charge is -e) is moving in the combined electric and magnetic fields of the figure: h tt p://post image. org/image/2sh3s3hs4/ What are the magnitude and direction of the antiproton's acceleration at ...

Math
or to be more specific, one half the base times the height. so one half of 16 times 31, or 8 times 31.

Math
A= (1/2)(b*h)

Calculus
i figured out the f^-1(x) is the ln ((-13x-6)/(17x-5)) i just need a and b plz help before 11 pm

Calculus
f(x) = (5e^x-6)/(17e^x+13) find f^-1(x). since the domain of f^-1(x) is in the open interval (a, b) what is a and and b?

chemistry
Iron(II) can be oxidized by an acidic K2Cr2O7 solution according to the net ionic equation. Cr2O72− + 6 Fe2+ + 14 H+ 2 Cr3+ + 6 Fe3+ + 7 H2O If it takes 44.0 mL of 0.0250 M K2Cr2O7 to titrate 25.0 mL of a solution containing Fe2+, what is the molar concentration of Fe2+?

Algebra
apples- 55 cents oranges- 75 cents

statistics
The results of a medical test show that of 66 people selected at random who were given the test, 3 tested positive and 63 tested negative. Determine the odds in favor of a person selected at random testing positive on the test.

Life orientation
Identify 5 practices in contravention of the basic conditions of employment act?

physics
the coefficient of restitution between the ball and the floor is 0.60 If the ball is drop from rest at the height of 6.6 m from the floor. Find a) what is the maximum height will the ball attain after the first bounce. b) how much kinetic energy is lost duirng the impact if ...

physics
north-eastern

Physical science
The acceleration due to gravity on earth

world history
some parts of spain remained under muslim control for how many years

Physics with Calc
A point charge of 1.8uC (microcoulumbs) is at the center of a Gaussian cube 55 cm on edge. What is the net electric flux through the surface?

Chemistry
Need help balancing this equation, just the coeffecients, do not need to balance the charges. The numbers are subscripts: Ca0.41Mg0.36Mn0.50Fe1.76Al2Si3O12 + H + H20 <---> Al(OH)3 + FeOOH + MnO2 + Ca + Mg + Si(OH)4

geometry
How to find the area of a KITE when the length of only one diagonal is given, with two pairs of congruent sides but with no length described

Algebra
7. Marcus can paint a garage in 3 hours. Gina can paint the same garage in 2 hours. How long will it take Marcus and Gina to paint the garage if they work together

Algebra
Thank you so much!!!(:

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