# Posts by richard

Total # Posts: 302

Math
A salesperson sold 4 cars for a total value of 54,000 dollars. Her co-worker sold 8 cars for a total the value of d dollars. Write an algebraic expression that represents the combined value of the cars sold by the salesperson and her co-worker?

Physics
whoops, I noticed I used 3.4 seconds not 3.14 y= .5*9.8* 3.14^2= 48.31

Physics
If ball1 has been dropping for 3.4 seconds, then ball1 has dropped: y= vo*t+(1/2)*g t^2 where vo= 0.0 since is was "dropped", not thrown. or y=.5*9.8*3.49^2= 59.68meters

terminal velocity
A que ball dropped from a third floor window will reach what speed/velocity? Is that high enough to reach terminal velocity?

math
Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra? 200 words or better

Government
If you asked the same question about an upcoming election to many people,you would be conducting a? A.Scientific poll B.Straw Vote C.Public Agenda D.Representative Sample

Physics
It's all good to say that Brandon but the fact is you googled as well and came to this link. Hahahahaha

Science
I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?

Statistics
The Deborah Heart Institute performs many open-heart surgery procedures. Recently research physicians at the Institute developed a new heart bypass procedure that they believe reduces the average length of recovery. The hospital board will not adopt the procedure unless there ...

science
t will not change. It will continue in the same direction at the same speed.. Science Fusion Houghton Mifflin Harcourt.

Maths
14 metres of rope costs €9.52. If Joe bought 21 metres, how much change out of €20.00 do Joe get? Is there a shorter way of doing this other than dividing, multiplying and then subtracting?

algebra
4r - 10r + 24

PHYSICS
Mass on moon = mg. = 70 kg × 0.17 =11.9 N.

algebra
The solution to this i believe is no solution need help. -2x+2>-2x-3

chemistry
Oh reacts with Ca which decreases [Ca] and pushes reaction right CaC2O4<>Ca+C2O4

History
thank you

History
Both were a cry for independence and freedom. Is that correct

History
How was the writing of the Grito de Dolores similar to the writing of the petition by the First Continental Congress?

Algebra
(8.1 . 10^8) . (4.2 . 10^3)

FRATION
12/345

Math-Statistics
Find a confidence interval for ƒÊ assuming that each sample is from a normal population. a. P x = 14, ƒÐ = 4, n = 5, 90 percent confidence b. P x = 37, ƒÐ = 5, n = 15, 99 percent confidence c. P x = 121, ƒÐ = 15, n = 25, ...

physics
What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6 106 m/s?

Physics
What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?

Physics
If Galileo and his assistant were 16 km apart, how long would it take light to make the round-trip? How does this time compare with reaction times of about 0.4 s?

Retired 71 years old
If I borrowed \$78,000 from a bank and had perfect credit; How much interest would I have to pay in Dollars and cents? The loan is for 7 years

English
Rewrite the passage below correcting any errors of grammar and usage The mechanic drove out the car to Joe that was lubricated. As a matter of fact, he has not done enough on it as Joe has expected. But whatever it was he decides to take it like that. The experience with the ...

geometry
What happened when two fruit companies merged?

Geometry
Name the properties that justify the steps taken. AB=EF; thereforeAB+CD=EF+CD

Physics
What is the fundamental frequency for a 62 cm banjo string if the speed of waves on the string is 470 m/s?

Physics
How long is a wavelength of infrasound with a frequency of 4 Hz?

Physics
Radio waves travel at the speed of light, which is 3.00 108 m/s. What is the wavelength for a FM station broadcasting at 105.9 MHz (the prefix M is "mega" and means 106)?

Physics
What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?

statistics
the mean is based off of 3 months. multiply it out to get the mean for a correct time period (1.5x4=6). I use the Poisson function in excel. Mean is equal to 6 and x is equal to 12 and 0. True is up to a certain number (up to 12) and false is exactly a certain number (exactly ...

Chemistry
Well Kae, 3KOH + Fe(NO3)3 -> 3KNO3 + Fe(OH)3

physics
A student of weight 990 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?

math
a 4 digit number my 2 nd digitis twice my 3 digit the sum of all my digits is 3 times greater than my last digit the productof my 3rd and 4th digits is 12 times greater than the ratio of my 2nd to 3rd whats my number?

math
solve by the elimination method: 9x-9y=18 7y-3x=-8 please solve step by step thank you for your help

chemistry
Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution

Chemistry
A gas has a volume of 50.0 cm3 at a temperature of -73°C. What volume would the gas occupy at a temperature of -123°C if the pressure stays constant

math
The best answer is D - 6. The two negatives cancel each other out, making the sum 18 divided by 3, equaling 6.

college chem
The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10&#...

physics
What is the average current through a conductor that carries 4 375C during a 2 min time period?

english
What opinion might they have of the author? What could you as a writer do to prevent this problem?

english
How might readers react if the topic sentences in an essay did not coincide with the supporting points, and why would their reaction be justified?

Direct verse indirect cost Estep Construction Company is composed of two divisions: (1) Home Construction and (2) Commercial Construction .The Home Construction Division is in the process of building 12 houses and the Commercial Division is working on 3 projects. Cost items of...

chem101
propyl Bromide reacts with Mg, Propanone, H+ to yeild what?

chem101
Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.

Chemistry-102

The world History
where are the questions to assignments 1-5 world history number007678

chem
What is the [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?

Chemistry
What volume of dry hydrogen would be produced under standard consitions when 0.250g of magnesium reacts with excess HCl?

Math
The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

Math
The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

Math
Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra?

algebra
what are the coordinates of the points at which the slope of the function with the equation y = x^4 - 8x^2 is equal to zero ?

physics
Two boxes are similar. The larger box has a volume that is 64 times the volume of the smaller box. What is the ratio of the larger box's height to the smaller box's height? write the fraction as a decimal

What is a number sentence that shows the same product as the product of 9 and 2

chem class
A 25.00-mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 10.0 mL of KOH is ???? M.

comp
what is the verb tense in this sentence? Education is contributing a good role of successful financial planning.

Microeconomics
opportunity cost of taking this trip is tavel accomandations

each european group that set up colonies settled in a specific part of americas fact

1/m-m/2=6X+5/12

Physics Lab I
Let's say you measure an average acceleration to be 0.4134 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. ?? cm Use three ...

Hi! is my answer correct? Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value ofKeq for this reaction is I solved by...

we have a ring that has an indian head marking on the inside of the ring, do you know what it means, who made it, how old it is, or what its actually called so we can search the meaning ?

what are 4 possible tune-ups to help you keep a postive attitude?

math
f(x)=ax+b f(-2)=27 and f(1)=15 find the value of x when f(x)=-5 how do you work this out?? thanks so much

A square made by a length of string 8 cm long is reshaped into a circle. What is the circumference of the circle

Real Estate Management
\$34,500

Physics
Wha?

Physics
A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)

accounting
There is also a lot of companies that report their federal taxes using the accrual basis and their state taxes on the cash method. Why do you think a company would want to do this?

college physical science
how much would a 80.0kg person weigh on earth where the acceleration of gravity is 1.63m/s2

college physical science
how much would a 80.0kg person weigh on mars if the acceleration of gravity is 3.93m/s2

college physical science
According to table 1.3, what volume of iron would be needed to balance a 1.00cm3 sample of lead on a two pan laboratory balance? Table 1.3 shows densities g/cm3 such as iron=7.87g/cm3 and lead is 11.4g/cm3

Physical Science
A cubic tank holds 1,000kg of water. What are the dimensions of the tank in meters. Explain your reasoning.

Physics
Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?

Physics
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is 1x10-10m in...

Chemistry
A buffer prepared by mixing equal amounts of the salts Na2HPo4 and NaH2PO4 to give a total phosphate concentration of 0.1M. What is the concentration of Na ions? I believe it is 0.3M but am having trouble understanding why when I write out the dissociation of the Na2HPo4 and ...

Chemistry
A buffer prepared by mixing equal amounts of the salts Na2HPo4 and NaH2PO4 to give a total phosphate concentration of 0.1M. What is the concentration of Na ions? I believe it is 0.3M but am having trouble understanding why when I write out the dissociation of the Na2HPo4 and ...

Physics
How does one Coulomb of charge compare to the charge on an electron? How do you think such a large difference arose historically?

Physics
Where should most of the mass be for an industrial fly wheel? Why? can't find any thing about this in my book. need help answering this.

math
Hi, the £ is pound sterling and p is pence, so can be swapped for \$ and c/

math
I am an odd multiple of 50p. My number of £s is double 18. What am I?

Physics/ Science
How does a derivation differ from an experiment or a theory?

Physics
Having trouble determ the formulas for the follow problems. 2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go? 60 km 3. At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it...

physics
An object 7.25 cm high is placed 15.1 cm from a convex mirror of radius 55.2cm. (a) What is the image distance?

math
3/5 + 1/10=? i got 7/10 or 12/20, which one is correct?

music
2. What role did Totalitarianism play in the creation of music particularly in Germany and the Soviet Union during the twentieth-century? Which composers were most affected by totalitarianism? How did affect their lives?

reply to Q " Physics hard... can't get it right"
kk this is what i did V=strt(3*k=8.31*T=1365)/m=5.32*10^-26

Physics hard... can't get it right
oo ok let me try that also can you tell me the distinction like when to use gas constant and boltzmann constant

Physics hard... can't get it right
strt(3 * k=8.31 * T=1365)/ m = 5.32*10^-26

Physics hard... can't get it right
A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 10,000 L and is filled to a pressure of 200 atm at 273 K. The maximum pressure the cylinder can hold is 1000 atm. The molar mass of Oxygen is 32 g/mol. ...

Physics hard...
Young's Modulus (Y) 20 X 1010 N/m2 Shear Modulus (S) 8.1 X 1010 N/m2 Bulk Modulus (B) 16 X 1010 N/m2 The table to the above represents various properties of steel. You have steel wire 4.9 meters in length that stretches 0.16 cm when subjected to a force of 400 N. What ...

physics
A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 10,000 L and is filled to a pressure of 200 atm at 273 K. The maximum pressure the cylinder can hold is 1000 atm. The molar mass of Oxygen is 32 g/mol. ...

trig
Graph three periods of the function. (identify period and phase shift and intercepts) y = f(x) = √3/2 sin(2x) - 1/2 cos(2x) if you can't graph it can you at least get it into that simpler form which is graph able.

trig1 more question
it is always true that if -1 ≤ x ≤ 1 then cos(Arccos(x)) = x Give an example showing that Arccos(cos(x))= x need NOT be true for all x

Trigonometry
Find all solutions for the following equation in the interval 0 ≤ x <2pi 3cos(3x)=6 i got cos3x=2, don't know how to go further i think it would be no solution but just want to confirm.

physics
20meters

Government
How can the actions of urban elites help explain the Great Recession?

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