Terra
Most popular questions and responses by Terra
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
asked on January 12, 2012 
economics
What does the curved line represent in the graph?
asked on October 23, 2012 
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
asked on July 24, 2010 
Calculus
Differentiate. f(x) = 4xe^xcsc(x)
asked on September 28, 2018 
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?
asked on January 14, 2014 
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)=15t4.9t^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
asked on September 5, 2011 
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?
asked on March 30, 2013 
calculus
Show that tan^3(x)8(tan^2(x))+17(tan(x)08 = 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
asked on October 24, 2011 
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 perpendicular the distance between
asked on October 4, 2006 
corporate finance.
At any given time how would the yeild curve facing a AAArated company compare with the yield curve for u.s. treasury securities? At any given time how would the yield curve facing a BBrated company compare with the yield curve u.s. treasury securities.
asked on September 23, 2009 
math
solve for the unknown: 6e^(4t) = 2
asked on September 4, 2011 
math
Simplify by referring to the appropriate triangle or trigonometric identity: cos(arctan(x))
asked on September 2, 2011 
Math
For middle school pizzaz worksheet number 66, moving words.What's the answer? I need the answer, like, ASAP.
asked on October 15, 2014 
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
asked on July 24, 2010 
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
asked on November 7, 2012 
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
asked on September 26, 2011 
Ms. Sue
I've looked at a lot of these questions and I'm disappointed that people don't appreciate Ms. Sue at all. She takes a lot of time out of her day to help students get better grades. Thanks Ms. Sue, for being a great tutor.
asked on December 22, 2015 
economics
What gives the U.S. government the right to collect taxes?
asked on October 23, 2012 
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
asked on September 19, 2011 
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
asked on December 30, 2010 
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)
asked on October 24, 2011 
calc
how do i find the derivative of 16^(sinx)
asked on October 3, 2011 
math
Estimate the instantaneous rate of change at the point indicated. y(t) = sqrt(3t+1) t=1
asked on September 6, 2011 
math
arcsec(sec(3Π/2))
asked on September 2, 2011 
U.S. World History
I need to compare and contrast the ideas and pilosophies of the Federalists and Antifederalists!
asked on October 7, 2009 
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
asked on December 19, 2009 
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
asked on November 17, 2009 
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
asked on November 16, 2009 
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
asked on November 15, 2009 
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
asked on October 6, 2011 
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
asked on September 26, 2011 
math
touchdowns are six points per touchdown and an extra point can be awarded by making a field goal. Assuming that a team makes a field goal every time they score, write an equation to find "y" the total score for "x" amount of points.
asked on February 6, 2017 
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?
asked on April 6, 2013 
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?
asked on February 2, 2013 
calculus
find the derivative with respect to x: sqrt(x+s) = (1/x) + (1/s)
asked on October 16, 2011 
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?
asked on October 2, 2011 
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?
asked on September 20, 2011 
math
Show that the following function is continuous only at x=0 : f(x) = x for x rational x for x irrational
asked on September 15, 2011 
math
how do you do the following without a calculator: 3 x 4^(1/4)  12 x 2^(3/2)
asked on September 4, 2011 
calculus
Show that if a,b does not equal 0, then the line with xintercept x=a and yintercept y=b has the equation: x/a + y/b = 1
asked on September 1, 2011 
Biology
Should humans strive to preserve a representative sample of all biomes or aquatic zones?
asked on August 25, 2010 
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
asked on November 10, 2009 
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 the interest rate on 1yr. securities 1 year from
asked on September 23, 2009 
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..
asked on October 11, 2011 
chemistry
would aromatic rings be acidic or basic? they don't really have anything to lose or any spots to gain...
asked on September 20, 2011 
8th grade
is charles v of the holy roman empire catholic or protestant?
asked on December 7, 2008

math
Because 39+39=78
posted on December 19, 2017 
math
12?
posted on May 31, 2017 
Math
that is true
posted on February 6, 2017 
College Physics
a scooter and a rider together have a mass of 275kg. if the scooter slows with the acceleration of 4.50m/s^2, what is the net force of the acooter and the rider together?
posted on June 19, 2015 
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?
posted on November 7, 2012 
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.
posted on November 7, 2012 
Statistics
And by .9 I definitely meant n.....haha
posted on January 12, 2012 
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
posted on January 12, 2012 
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
posted on October 16, 2011 
Chemistry
Volume = length x width x height (units)^3
posted on October 3, 2011 
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.
posted on September 26, 2011 
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
posted on September 26, 2011 
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.
posted on September 20, 2011 
math
thank you! :]
posted on September 4, 2011 
math
ahh sorry that was supposed to be a separate question.
posted on September 4, 2011 
math
solve for the unknown: 6e^(4t) = 2
posted on September 4, 2011 
7t grade math
just multiply:) 0.45 times 246 = 110.70
posted on September 23, 2009 
Geography
is the netherlands protestant or catholic?
posted on December 7, 2008