04/06/13

find the indicated area under the standard normal curve. between z= -0.63 and z= 0.63
Elementary Statistics The area between z= -0.63 and z= 0.63 under the standard normal curve is?(Round to four decimal places as needed)      
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04/06/13

3x^2 +2x -16 =0 if a = 3 b=2 how can x =[-b +minus (b^2 - 4ac)] be /2a and I get 192 please reexplain
I don't understand this answer as if a = 3 b= 2 and c = -16 wouldn't a be 3 and wouldn't 196 be 192/6? Can I have it redone or explained a little more?
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04/01/13

Find the principal unit normal vector?
Find the principal unit normal vector to the curve defined by r(t)=<t, t^2>. T(t)=1/sqrt(1+4t^2)i+2t/sqrt(1+4t^2)j I need to find T'(t) using quotient rule but don't know how. Show your steps. more
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03/31/13

integration of |x|
details and answer
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03/31/13

integration of (sin(x))^5/(cos(x))^3
details of this integration and the answer
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03/31/13

complete the square of the following expression 3-2x-x^2
Please show the whole method and answer in my book is 4-(x+1)^2
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03/24/13

Use the Divergence Theorem to compute the surface integral?
Use the Divergence Theorem to compute the surface integral where Q is the cube -1<=x<=1, -1<=y<=1, -1<=z<=1, F=<4y^2, 3z-cosx, z^3-x>. (Answer: 8) The divergence of the... more
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03/24/13

how would you divide (6-q+8q cubed-4q squared)by (2q-2)
please show the work
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03/24/13

how do you solve tan2x=0.5 for x?
Please, help me to solve for x. Show steps.  Thank you! 
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03/24/13

find quadratic
find the quadratic function that best fits this data   x  -10.2,  1.4,  7        y  100,  5,  56
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03/23/13

How do you find the equation to an integral when the equation is not given but the answer to the integral is?
int; integral sign Find int (bottom: -3 top: -5.5) (8*f(x)-9)dx when int (bottom:-5.5 top:-3) f(x)dx = -2 Also; let int (bottom: -8 top: -0.5) f(x)dx =8 int (bottom: -8 top: -5.5) f(x)dx =... more
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03/21/13

Compute the surface area?
Compute the surface area of the portion of the plane 3x+y+2z=6 inside the cylinder x^2+y^2=4. (Answer: 2pi*sqrt(14)) The formula for the surface area of a cylinder is A=2pi*r^2+2pi*r*h But how do I... more
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03/18/13

what is (7-4x)^6
Expand in terms of ascending powers of x
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03/17/13

Find the inverse function of f(x)=x^3+5
I cant figure out how to solve this problem!!
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03/16/13

Graph y=2tan(3x-30)+2 in degrees
came across this problem and it is suppose to be graphed in degrees. I have only graphed in radians. How do I do it?
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03/15/13

What cation would sulfate be soluble to but phosphate insoluable to?
I need to know how to separate a solution of phosphate and sulfate
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03/15/13

Solve Linear Equations by Matrix Methods
8.8x -1.5y+1.6z=13.32 3.3x+3.0y-0.1z=1.24 5.5x+4.5y+3.2z=18.76
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03/13/13

what is the formula for the sequence 2,4,14,32
can you help me figure out the formula for this sequence of numbers  
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03/10/13

What is the next number in this sequence 3 -6 12 4 20 ?
What is the next number in this sequence of numbers: 3 -6 12 4 20 ? Need rule, thank you!
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03/05/13

How to do division pf polynomials
Dividing polynomials by binomial and trinomial, I am very new to algebra and we are in intermediate algebra, they just gave me the class, I'm an online student (67yrs of age), never ever had this... more
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03/04/13

in how many ways can a committee of 5 be chosen from 6boys and 4girls
The committee of 5 is to be chosen from 6boys and 4girls and the committe must have exactly 2 girls
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03/04/13

How do you tell what kind of bond a compound is
I've been given some homework in chemistry and I'm not sure how to tell if a compound or ion is an ionic, covalent or polar covalent bond. I also have to identify what kind of molecular shape a... more
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03/03/13

derivative proof for x^-n
proove derivative of x^-n =-n x^ (-n-1) 
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03/02/13

How do you compute compounded interest, when it changes half way through?
You deposit $4000 in an account that pays 8% interest compounded semiannually. After 4 years, the interest rate is increased to 8.24% compounded quarterly. What will be the value of the account... more
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03/01/13

How do you know that you are not a genius?
Does it onlytake a high IQ to be a genius?
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