11/10/16

Suppose the population of a certain city is 37353735 thousand. It is expected to decrease to 30433043 thousand in 50 years. Find the percent decrease.
help 
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11/10/16

Engine Temperature
In an engine, air is at 1x102kpa and a temperature of 298.15K in a cylinder volume of 0.400L. The air is then compressed to 0.050L volume and pressure of 2.5x103kpa. Assume number of moles is... more
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11/10/16

An airplane on autopilot took 6 hours to travel 4,224 kilometers. What is the unit rate for kilometers per​ hour?
i REALLY NEED HELP ASAP
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11/10/16

The square root of twice a number is equal to one-third of that number. Find the number.
i have no additional information.
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11/10/16

Just need help setting up the problem
The sum of two numbers is 75. The difference of one of them and twice the other one is 0. Find both numbers.
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11/09/16

logarithmic problem
if lime juice has a pH of 1.7, what is the concentration of hydrogen ions in lime juice to the nearest hundredth
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11/09/16

if g(x)=x^3coz2x find g'(0)
πThere is two questions. The first is find g'(pi) and the second is find g'(0). Thanks for your help! I've looked through all of my notes and just can't seem to figure out how to do them.
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11/08/16

How do you expand (-x-y)^2 ?
I know it'll expand by the (a-b)^2 formula but I'm confused with the minus symbol. Please explain in detail, thankyou.
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11/08/16

Find a polynomial function of least degree having only real coefficients, a leading coefficient of 1, and zeros of 3 and 4+i
Find a polynomial function of least degree having only real coefficients, a leading coefficient of 1, and zeros of 3 and 4+i
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11/07/16

physics incline questions
A 16kg box is accelerating down a 35° incline. There is kinetic friction acting on the box. Select the correct net equation for the y direction in this scenario.Choose one answer. a. Fn-mg=0 b.... more
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11/07/16

3.45 g of an unknown gas at 4.9 degrees Celsius and 1.05 Atm is stored in a 1.85 L flask . What is the density g/L and the molar mass g/mol ofthe gas?
What would the answers Be and how to solve it step by step?
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11/07/16

What is the frictional force exerted on a 500 N block that is sliding across a ceramic floor that has coefficient or kinetic friction of 0.5
What is the frictional force exerted on a 500 N block that is sliding across a ceramic floor that has coefficient or kinetic friction of 0.5
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11/07/16

Why does each gas show a colour only when electricity was passed through the discharge tube
we used an apparatus containing a power source and gas discharge tubes we then looked through diffraction grating and observe the spectra produced by each gas discharge tube
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11/05/16

Chemistry Question
Using experimental values, place the first ionization energies in order from least amount of energy to greatest amount of energy input required: sodium, silicon, magnesium, aluminum
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11/05/16

What is the mass, in grams, of 4.621 x10^24 molecules of water
Just something I'm stuck on
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11/05/16

I need help on this problem they asking the number of visitors in 60 years
The logarithmic function f(x) = -100 + 87 ln x models the number of visitors (in millions) to a certain country's museums, where x is the number of years since the initial recording of the number... more
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11/05/16

Solve intensity of light.
Light with intensity 500 candela and polarization 27 degrees passes through a linear polarizer at 91 degrees. What is the intensity of light after the filter?
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11/05/16

solve for intensity of light
Light with intensity 500 candela and polarization 27 degrees passes through a linear polarizer at 91 degrees. What is the intensity of light after the filter?
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11/04/16

A sample of 45.1 g of methane gas (CH4(g)) has a volume of 6.20 L at a pressure of 2.90 atm. Calculate the temperature.
A sample of 45.1 g of methane gas (CH4(g)) has a volume of 6.20 L at a pressure of 2.90 atm. Calculate the temperature.
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11/04/16

a sample of oxygen at 25 degrees celcius occupies a volume of 5.96 * 10^2 mL at 1.45 atm pressure. what pressure must be applie....
a sample of oxygen at 25 degrees celcius occupies a volume of 5.96 * 10^2 mL at 1.45 atm pressure. what pressure must be applied to compress the gas to a volume of .82 *10^2 mL with no temperature... more
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11/04/16

Explain why the graph of the rational function f(x)= (-1)/(X^2+4) has no vertical asymptotes
I believe it is because there are no x factors in the numerator but unsure.
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11/04/16

Slit width in milimeters
Light of wavelength 502 nanometers passes through a double slit aperture. The first non-central bright spot is located at 2.88 degrees. What is the slit width in millimeters?
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11/04/16

How many oxygen atoms are in 2H₂O? a)1 b)2 c)3 d)6
Help! I need to know the answer pleassssssssssssssssseeeeeeeeeeee!
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Cal

11/04/16

Derivatives with inverse trig functions
How do I do this :    y=arccos( x+arcsinx) 
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11/04/16

Find equatin of the tangent line(implicit diff)
Hi, I just need to know if my answer is correct. Its asking to find the equation of the tangent line for : x2ey +yex =4 at (2,0)      Answer: y=-x/2 +1
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