06/28/14

Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -9x2 + 5x + 9.
A. -9/5 B. 9 C. 5/18 D. -5/9
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06/28/14

sin a+cos a+tan a+sec a+cosec a+cot a=7.then prove that sin 2a is the root of x^2-44x+36
I am not havin g any idea to solve it.
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06/27/14

express matrix A as a skew symmetric and symmetric matrix
express matrix 'A' as a skew symmetric and symmetric matrix
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06/22/14

What are the dimensions of such a rectangle with the greatest possible area?
A rectangle has its two lower corners on the x-axis and its two upper corners on the parabola y=11-x2What are the dimensions of such a rectangle with the greatest possible area? width=? height=?
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06/21/14

What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
A fence 5 feet tall runs parallel to a tall building at a distance of 5 feet from the building.What is the length of the shortest ladder that will reach from the ground over the fence to the wall... more
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06/19/14

Area between curves
Sketch the region in the xy-plane defined by the inequalities x − 3y2 ≥ 0, 2 − x − 5|y| ≥ 0 and find its area. If I did it correctly, I have a region defined by x=3y^2, (x-2)/5, -(x-2)/5 with x... more
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06/13/14

What is the apparent power of an 8A, 120VRMS motor with a power factor of 0.90?
What is the apparent power of an 8A, 120VRMS motor with a power factor of 0.90?
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06/12/14

Cumulative Distribution
If the cumulative distribution function of X is given below, then find P (X < 0.80).  f(x)=0, if x ≤ 0  f(x)=x^2, if 0 < x ≤ 1  f(x)=1, if x > 1
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06/02/14

At what rate in cubic centimeters per minute is the volume increasing at this instant?
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^(1.4)=C where C is a constant. Suppose that at a certain instant the... more
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05/26/14

Evaluate the integral?
Evaluate the integral ∫ from 0 to 1 ∫ from sqrt(y) to 1 of e^x^3 dx dy by reversing the order of integration.    Please show all your work.
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05/24/14

Integrate f(x, y, z)?
Integrate f(x, y, z)=x^2+y^2-z over the tetrahedron with vertices (0, 0, 0), (1, 1, 0), (0, 1, 0), (0, 0, 3).   Please show all your work.
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05/24/14

How to write an iterated integral?
Consider the double integral x*y^2 dA where R is the region bounded by y=x^2 and y=2x.    a) Write an iterated integral with the order dy dx that is equal to the above integral. b) Write an... more
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05/21/14

find the equation of the tangent line
Find the equation of the tangent line to the curve at the given point.\\ y=1+2x-x3, (1,2) y=
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05/21/14

Show that f(x) has a removable discontinuity
Let f(x)=(2x2+4x-16)/(x-2) show that f(x) has a removable discontinuity at x=2 and determine what value for f(2) would make f(x) continuous at x=2 must define f(x)= 
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05/12/14

Can some one teach me how to solve this problem in calculus????
Hi, I need someone to teach me how to solve this problem:   Find an equation of the tangent plane to the surface  ƒ(x,y) = tan(x2y)    at the point P where x= 1, y=π(pi)/4 . State the equation... more
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05/12/14

Help in calculus problem!!
Hi, can anyone teach me how can I solve this problem?    For the surface:  g(x,y) = In(y + x2) + y   -- Find the directional derivative of ƒ(x,y) in the direction  u→ = i→ + 2j→    at the... more
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05/03/14

Do the first two valence electrons in a valence electron pair? If so, what is the molecular geometry of the B atom?
Is the valence for Boron .B: or .?. ? Explain this in terms of the molecular geometry. 
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04/27/14

potassium permanganate reacts with hydrochloric acid forms potassium chloride, manganese chloride, chlorine and water
write and balance the chemical equation. please give the answer as soon as possible before 28-4-14. 
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04/16/14

Find the area?
Find the area enclosed by the curves y=x^3-8x^2+18x-5 and y=x+5.    Please show all your work.
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04/16/14

find the indefinite integral using a trigonometric identity to set up a u-substitution
∫sin4xcos5x dx
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03/24/14

Solve for x
Please help me solve the following:   x3+2x2-9x-18=0
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03/19/14

For the standard normal distribution, find the probability that z between -1.47 and -.16
For the standard normal distribution, find the probability that z between -1.47 and -.16  
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03/16/14

Find the integral?
Find the integral e^(2x)/(1+e^x) dx.    Answer: e^x-ln(1+e^x)+C    
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03/14/14

what is m^3-3m^2=5m-15 factored?
 i cant seem to figure this out
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03/12/14

may i have some help?
find sin (a-b) if sin (a)= 3/5 where a is in the second quadrant  and cos (b)= 15/17 where b is in the first quadrant   1.) 36/85   2.) 84/85   3.) 13/85   4.) 77/85
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