Wednesday

July 1, 2015

July 1, 2015

Total # Posts: 525

**Calculus HELP plz**

Find the area of the surface obtained by rotating the curve y=sqrt(4x) from x=0 to x=1 about the -axis. about the x-axis. surface area= ⌠ 2pi * f(x)*sqrt[1 + (f'(x))^2] dx from a to b ⌡ it's been 45 years since I used that formula. I ended up with the ...
*May 12, 2007*

**Physics and chemistry**

why does the electrical resistance in your body decrease when you get wet Salt is in the skin, salt water is a good conductor.
*May 6, 2007*

**Calculus HELP plz**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=4x^1/2,y=5,2y+1x=5 Do you really mean "2y+1x=5" ? It is not customary to use the coefficient 1 in front of a variable. It is ...
*May 5, 2007*

**calculus edit**

1. Find the volume formed by rotating the region enclosed by x=5y and x=y^3 with y is greater than or equal to 0 about the y-axis. 2. Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis y=18x-6x^2 , y=0 : about the ...
*May 4, 2007*

**Calculus**

1. Find the volume formed by rotating the region enclosed by x=5y and x=y^3 with y¡Ý0 about the y-axis. 2. Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis y=18x-6x^2 , y=0 : about the y-axis. PLease...
*May 4, 2007*

**Calculus urgent**

For the intergral of -(x^2)/3 +6 interval [0,3] Rewrite it as a function of n using the right hand endpoint without any summation sign. can anyone help me start this problem out? I noticed somebody else had that post before, perhaps it was you. I am not sure exactly what you ...
*April 19, 2007*

**calculus**

For the intergral of -(x^2)/3 +6 interval [0,3] Rewrite it as a function of n using the right hand endpoint without any summation sign. can anyone help me start this problem out?
*April 19, 2007*

**Calculus**

The following Summation 1 2 1 2 1 2 ------ x - + ------ x - + ------ x - 1+(2/n) n 1+(4/n) n 1+(6/n) n is a right Riemann sum for this integral ç f(x)dx With subintervals [1,3] can someone help me solve for the inegrand which is f(x).?
*April 16, 2007*

**calculus**

A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 33 feet? I got h=10.180619625,r=2.458141125 and Area = 59....
*March 27, 2007*

**calculus**

I need help on finding the local linear approximation of tan 62 degree. i got 1.77859292096 can someone check if i got it right? tan(60+2) = (tan 60+ tan 2) / (1- tan60 tan 2) But tan2 appx = sin 2deg = sin2PI/180= 2PI/180 tan 62=(tan 60+2PI/180) / (1- tan60 2PI/180) check ...
*March 20, 2007*

**Calculus test tomorrow**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? I know side A=5 but how do ...
*March 8, 2007*

**MATH**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? You should draw out a ...
*March 8, 2007*

**spelling**

glue:sticks::thorns
*January 16, 2007*

**math**

solve 2x^2+3x+8=0 and express the solutions in a+bi form. Let's use the quadratic formula to solve for x and express those solutions in a+bi form. x = [-b + or - sqrt(b^2 - 4ac)]/2a Note: sqrt = square root. a = 2, b = 3, and c = 8 from your problem. Therefore: x = [-3 + ...
*January 10, 2007*

**math**

factor 243p^5+q^15 Since you have powers of p and q by themselves in separate terms, it cannot be factored. Are you sure you copied the question correctly?
*January 10, 2007*

**Math**

find an equation for a ploynomial function with zeros, negative 8, negative 3 over 4, 1 over 5, and 2. hey it is 53h8kkds f (x) = x(x+8)(x+ 3/4)(x- 1/5)(x-2) will be zero when any one of the factors is zero. Multiply the factors to get the polynomial form.
*January 10, 2007*

**Math**

a square + b square = 80 ft (c Square) Through trial and error I can tell you that 6 squared (36) and 12 squared (44)are what you're solving for, but I just used trial and error to figure it out. 12 square is 144, not 44 a and b can be a combination of many numbers. For ...
*January 2, 2007*

**Math-approximation with fractions:7th grade math**

15/56 and 8/35
*November 19, 2006*

**Physics**

A__2Min.______B_____2Min.________C This makes no sense to me. Can you amplify?
*November 14, 2006*

**Chemistry**

NH3(aq) --> NH4OH NH4OH + CuCl2 --> Cu(OH)2 + NH4Cl First a massive precipitate forms (the copper hydroxide), however as more ammonia is added the equilibrium shifts to the diaquatetrammine copper(II) complex. Your best guess: CuCl2(aq) + 6NH3(aq) -->[Cu(NH3)4(H2O)2]2...
*November 7, 2006*

**Chemistry**

a)CO2- has highest molecular weight b) all of them same because kinetic energy is determined by temperature, and thats the same c)CO2- has most electrons d) He-smallest size
*October 22, 2006*

**English**

please anybody i need help i will fail other wise
*October 17, 2006*

**English**

i need help paraphrasing
*October 17, 2006*

**nucleus true facts**

wow,, this website is useful !!!!!!!!!!
*October 4, 2006*

**word unscramble**

hey wats up my friend
*September 28, 2006*