Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 56

**math**

a carpenter has a wooden stick that is 84 centimeters long.then she cuts of 25% from the end of the stick.then she cuts the remaining into 6 equal pieces.what is the length of each piece?

**biology - environmental**

How does the edge (shoreline) of a marsh/wetland affect the wetland? Would it be better for the wetland to have a round or broken shoreline? Are coves, peninsulas and islands important to have? How does the shape affect wave action and exposure to wind?

**math**

the actual sales for the last four years have been 24 units,30units,23units and 27 units what is the average number of units you can expect to sell next month?

**Chemistry**

You have a 100mL cylinder containing 40mL of water. A cube measures 2cm on each side is lowered into the cylinder. What is the new volume reading of the cylinder?

**Multiplying and Dividing Decimals**

This is where I believe I have found my error. This was my work: 23.9 _______ 3) 71.80 - 69 ______ 28 -27 ____ 10 -9 ____ 1 I have been caught in a place where I am stuck; doomed to repeat the same 23.999...pattern so I do I round it up to_______ or-?

**Multiplying and Dividing Decimals**

Okay. I have tried dividing but was unsure of my result. I have now found my error and will redo my division. Then I will let you see my process of what I have done.

**Multiplying and Dividing Decimals**

Sam and 3 friends ate lunch at Red Lobster. They decided to split the bill evenly. The total bill was $71.80. How much was each person's share? *Note: Please do not just give me the answer, but also show me how said answer was achieved and the steps to take to get there. T...

**economics**

What gives the U.S. government the right to collect taxes?

**economics**

What does the curved line represent in the graph?

**Statistics**

And by .9 I definitely meant n.....haha

**Statistics**

Never mind, got it. If anyone wants to know how to get it though... 1.5/(sq root of .9)=.01 Solve the equation, then square each side. Answer=225

**Statistics**

The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.15 grams per mile . (a) What sample size is needed so that the standard deviation of the sampling distribution is 0.01 grams per mile ?

**calculus**

Show that tan^3(x)-8(tan^2(x))+17(tan(x)0-8 = 0 has a root in [0.5, 0.6]. Apply the Bisection Method twice to find an interval of length 0.025 containing this root. I have NO idea where to go with that equals 0 part...I could figure it without it but that throws me off complet...

**calculus**

using the intermediate value theorum, prove that arctanx = arccosx has a solution. i've gotten that the domain of arctanx is -pi/2 to pi/2 but i'm not sure where to go from here...can i move the arccosx to the left? when i do that, i can't figure f(pi/2) though..i&...

**calculus**

of the equation that i put... sqrt(x+s)=(1/x)+(1/s) you have to take the derivative of both sides but i'm getting stuck

**calculus**

find the derivative with respect to x: sqrt(x+s) = (1/x) + (1/s)

**calculus**

Please help me find the derivative of f(x) = x^(2^x) I got to ln(f(x)) = 2^x(lnx) but now I'm stuck..

**calc**

Using Ohm's Law (V=IR), where units are volts, amperes, and ohms, and V is a constant 12, calculate: a) The average rate of change of I with respect to R for the interval from R=8 to R=8.1 b) The rate of change of R with respect to I when I = 1.5

**Chemistry**

Volume = length x width x height (units)^3

**calc**

how do i find the derivative of 16^(sinx)

**science**

if i have a Km of 9.78 x 10^-3, is that a relatively high Km, and therefore a low affinity for an enzyme?

**calc**

find derivative using limit definition: f(x) = x - sqrt(x) so f'(x) = lim h->0 [f(x+h) - f(x)]/h but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the deriv...

**math**

ahh sorry that was supposed to be a new question. i need help with both though hahah, so pleaseee help me! i know derivatives but not in these contexts.

**math**

Some studies suggest that kidney mass K in mammals (in kilograms) is related to body mass m (in kilograms) by the approximate formula K = .007m^(0.85). Calculate dK/dm at m = 68. Then calculate the derivative with respect to m of the relative kidney-to-mass ratio K/m at m = 68.

**math**

find derivative using limit definition: f(x) = x - sqrt(x) so f'(x) = lim h->0 [f(x+h) - f(x)]/h but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the deriv...

**chemistry**

would aromatic rings be acidic or basic? they don't really have anything to lose or any spots to gain...

**math**

Yes, he said that the one with one arrow means "if and only if" and then the other one, I have no clue. And I feel like he changes when he uses them so I'm confused hahah. I would just use and equals sign.

**math**

My teacher makes us use this: => and <=> to symbolize the steps we use to find our answers, but I don't understand the difference. Can someone please explain it?

**calc - limits**

I have been trying to figure out these limit problems and I get stuck on trying to move the function around to make it possible to solve. The first one is: lim sinx - cosx / tanx - 1 x--> (pi/4) All I've gotten so far is to replace tanx with sinx/cosx but I don't ev...

**math**

Show that the following function is continuous only at x=0 : f(x) = x for x rational -x for x irrational

**math**

Estimate the instantaneous rate of change at the point indicated. y(t) = sqrt(3t+1) t=1

**math**

A stone is tossed vertically into the air from ground level with an initial velocity of 15 m/s. Its height at time t is h(t)=15t-4.9t^2. Compute the stone's average velocity over the time interval [0.5, 2.5]. It says the answer is .3, but I keep getting something not close...

**math**

solve for the unknown: 6e^(-4t) = 2

**math**

thank you! :]

**math**

ahh sorry that was supposed to be a separate question.

**math**

solve for the unknown: 6e^(-4t) = 2

**math**

how do you do the following without a calculator: 3 x 4^(1/4) - 12 x 2^(-3/2)

**math**

Simplify by referring to the appropriate triangle or trigonometric identity: cos(arctan(x))

**math**

arcsec(sec(3Π/2))

**calculus**

Show that if a,b does not equal 0, then the line with x-intercept x=a and y-intercept y=b has the equation: x/a + y/b = 1

**Math**

Suppose there is a 10 meter ladder leaning against the wall of a building and the base of the ladder is sliding away from the building at a rate of 3 meters per second. How fast is the top of the ladder sliding down the wall when the base of the ladder is 8 meters from the wall?

**Biology**

Should humans strive to preserve a representative sample of all biomes or aquatic zones?

**Physics**

The figure below shows a thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle θ and released. (a) What is the speed of the ball...

**Physics**

Zero, a hypothetical planet, has a mass of 4.0 1023 kg, a radius of 3.0 106 m, and no atmosphere. A 14 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0 107 J, what will be its kinetic energy when i...

**Statistics**

Key considerations as Allied develops its strategy for disposing of the case are the probabilities associated with John’s response to an Allied counteroffer of $400,000 and the probabilities associated with the three possible trial outcomes. John will accept a counteroffe...

**Statistics**

Suppose that the average grade for all people who take this course in statistics is 83 with a standard deviation of 3.5. If your particular class has an average of 89, can you conclude that your class is better than average at the 90 percent confidence level? Sample size 21. ...

**Hypothesis**

Suppose that the average grade for all people who take this course in statistics is 83 with a standard deviation of 3.5. If your particular class has an average of 89, can you conclude that your class is better than average at the 90 percent confidence level? Identify one or t...

**Statistics**

Suppose that the average grade for all people who take this course in statistics is 83 with a standard deviation of 3.5. If your particular class has an average of 89, can you conclude that your class is better than average at the 90 percent confidence level? Identify one or t...

**american government**

Regulatory capture involves situations in which: a)a bureaucracy is responsive to the interest of the group or corporation that they are supposed to regulate b)bureaucrats make decisions without reference to interest groups, elected officials, or even their own policy views c)...

**U.S. World History**

I need to compare and contrast the ideas and pilosophies of the Federalists and Antifederalists!

**corporate finance. **

At any given time how would the yeild curve facing a AAA-rated company compare with the yield curve for u.s. treasury securities? At any given time how would the yield curve facing a BB-rated company compare with the yield curve u.s. treasury securities. Dr a graph to illustra...

**corporate finance. **

Suppose you observe the following Maturity 1 year Yield 6.0% Maturity 2 year Yield 6.2% Maturity 3 years Yield 6.4% Maturity 4 years Yield 6.5% Maturity 5 years Yield 6.5% What does the market expect will be teh interest rate on 1yr. securities 1 year from now? What does teh m...

**7t grade math**

just multiply:) 0.45 times 246 = 110.70

**8th grade**

is charles v of the holy roman empire catholic or protestant?

**Geography**

is the netherlands protestant or catholic?

**Physical Science**

A dog is chasing a cat; the cat's velocity is "v". The dog's velocity is directed towards the cat at all times. The dog maintains a constant speed "v". At the instant when the velocity of the dogs "v" and the cats "v" are perpend...

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