04/22/16

Null Hypothesis
Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen... more
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04/22/16

tan (cos^-1(1/3)) = ???
 I have to find the exact value for this expression.
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04/22/16

Simplifying a function to get a tangent line
In the middle of solving this implicit function/using implicit differentation to find its tangent line, this is what I have so far:   Original function: y^3+x^3-2xy=8 (find tangent line at... more
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04/21/16

Solving Polynomial Equations. Solve 64x^3+8=0.
Please help.
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04/21/16

the average of the upper and lower sum estimates
Using 4 equal-width intervals, show that the trapezoidal rule is the average of the upper and lower sum estimates for   8 ∫ x2 dx 0
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04/20/16

e^(2x+1) + 2e^(x+2) - 3 = 0 How to solve this?
e^(2x+1) + 2e^(x+2) - 3 = 0
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04/20/16

find the local maxima, local minima and saddle point of the function f(x,y)=2x3 +2y3 -9x2 +3y2-12y
find the local maxima, local minima and saddle point of the function f(x,y)=2x3 +2y3 -9x2 +3y2-12y
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04/20/16

given the function f(x,y)=3x2-2xy+4y2 in which direction does the function drop most rapidly at the point p (1,1) and calculate the derivative of the function
given the function f(x,y)=3x2-2xy+4y2in which direction does the function drop most rapidly at the point p (1,1) and calculate the derivative of the function in that direction
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04/19/16

Suppose a license plate consists of 3 letters and 3 digits. How many license plates can be made?
Is the answer 26*26*26*10*10*10 to signify that there must be exactly 3 letters and exactly 3 numbers? Would this equation work similarly if the order of the letters and numbers did not matter (ex:... more
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04/19/16

find the local extreme value of f (x,y) = 49 - x3 - y2 on the line x + 3y= 10
i need answer for this question please
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04/19/16

use the given degree of confidence and sample data to construct a confidence interval for the population proportion p
If 92 adults selected randomly from one town, 70 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance 
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04/18/16

Probability
If P(A) = 0.7, P(B) = 0.5, P((A ∪ B)c) = 0.1, find:(a) P(A ∩ B)(b) P(A|B)
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04/15/16

Suppose that tan(t)= 7/5 and that t is in quadrant III. Find the exact value of of sec(t).
Very confused on this one. Please help!! 
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04/15/16

The probability that z lies between -2.97 and -0.41
if z is a standa normal variable, find the probability 
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04/14/16

Curves general solutions
The general solution of the differential equation x dx + y dy = 0 is a family of curves. These curves are all   hyperbolas circles parabolas Ellipses
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04/14/16

Please help me prove by induction the theorm below
let〈an〉∞n=1 and 〈bn〉∞ n=1 by sequences of numbers Then ∀ m∈N ∑(an+bn) = (∑an) +(∑bn)   Proof by induction   Side note: The summations go from n=1 to m
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04/14/16

Help with problems ASAP!
1. One factor of x^3+x^2 - 14x - 24 is x -4 find the remaining factors   2.  state the possible number of positive real zeroes, negative real zeroes and imaginary real zeroes for g(x) = 3x^5 -... more
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04/14/16

Determine the angle measure between vectors u and v: u = 4i – 2j and v = i + 3j
Determine the angle measure between vectors u and v: u = 4i – 2j and v = i + 3j .
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04/13/16

Find volume of Solid
Find the volume of the solid bounded by x2+2y2=2, z=0, and x+y+2z=2
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04/12/16

If possible, find the exact value of the expression without the use of a calculator. cos^-1 (sin pi/3)
I really need some help on this. Please walk me through it.   If possible, find the exact value of the expression without the use of a calculator. cos^-1 (sin pi/3)
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04/08/16

The data list shows the scores of ten students in Mr. Smith's math class.
  The data list shows the scores of ten students in Mr. Smith's math class. 61, 67, 81, 83, 87, 88, 89, 90, 98, 100What is the standard deviation, to the nearest tenth, of the data if the scores... more
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04/08/16

synthetic Division?
Is (x - 2) a factor of x3 + 2x2 - 5x - 6?   I have to show my work using Synthetic Division 
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04/08/16

y(1+xy)dX= xdy how do we solve this differential equation
Which method do we use and what are the steps?  
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04/08/16

y=-x^2+2x-6
identify the vertex and axis of symmetry of each then sketch the graph.
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04/08/16

Differentiate with regard to x: y=cos^-1(x/a)+(a^2-x^2)^1/2
Differentiate w.r.t x
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