Mathematics

Find the rectangular coordinates for the point whose polar coordinates are given. (4, 2pi/3)

X = 4*cos(2pi/3) = -2 Y= 4*sin(2pi/3) = 2*sqrt 3-x = 4 * cos 2pi/3 y = 4 * sin 2pi/3

What are some sets of 4 positive integers whose reciprocals add to equal 1

1/A + 1/B + 1/C + 1/D = 1 Thanks for any help. Any correct answer gets a thumbs up. The most answers gets the Best Answer.-(2,3,12,12} {2,4,8,8} {2,5,5,10} {2,6,6,6} -------------- {3,3,6,6} --------

HELP-find the volume of the dish

A PIE WITH CIRCULAR CROSS SECTIONS IS 24 CM ACROSS THE TOP , 16 CM ACROSS THE BOTTOM, AND 6 CM DEEP. FIND THE VOLUME OF THIS DISH? Solve using integrals Can some one please help me with this question

I need help with a calculus integration problem

Determine the integral I=cosx/9+sin^2(x) Help please?-Please use parantheses next time!! Do you mean cos(x)/9 + sin²(x) or (cos(x))/(9 + sin²(x))? Ill do both for this case only. ∫cos(x)/9 + sin²(x)

What number would you choose? choose a number that is between 1 and 54.

9-I choose 1.If the number on the boundary is off-limits, then I choose 4.-random question, Id go for ,3,25, or 5 (lucky numbers) i think even numbers are unlucky lol-27-22-23-7,19,9,2, and 14

Challenging Problem?!

2^n + n = 40, find n. Please show work!!-The answer wont be a whole number because 2^5 = 32 and 2^6 = 64, so n has to be very close to 5. By trial and error, youll find that n is approximately 5.125

Find the angle between two lines

Line 1: x=y, z=0 Line 2: x=z, y=0-..............z .x=z,y=0..| ..........\....| ............\..| ..............\|________y ............./..\ .........../......\ ........./..........\ .......x.........x

Finding equation from a sine graph

Ive got a diagram full of graphs that make upapicture. Im trying to get all of the equations. There are linear graphs, quadratics and sine graphs. I need some help with the sine graph. It starts at t

The focal cord that cuts the parabola

x^2 = - 6y at (6,-6) cuts the parabola again at X fine the coordinates of X-x² = -6y (x - 0)² = 4(-3/2)(y - 0), standard form The focus of the parabola is (0, -3/2). The chord includes points (6, -6)

Maths question..exponential powers

a bacteria splits every minute how many bacteria are there after 60 minutes (starting with one bacteria)? how can i do this without working out each power and adding them as i go? thanks-At 0 minute

How to divide 32 / 529 by hand.

I have 529 on the left and 32 under the box. I add a 0 to 32 to make it 320, then another 0 to make it 3200. But, where does the decimal go? The correct answer is .0604.-OK Here is what it should lo

Math question on differential calculus

Ive been trying to get this question but I just dont understand how Im supposed to go about finding the answer! Help! The tangent to the curve y=x^2+ax+b, where a and b are constants, has equation 4x

A few fill in the blank questions... Geometry related.

Was wondering if you guys could help me out with a few of my last math fill in the blank questions. 1. If 2 lines intersect, they have ______ point(s) in common. If 2 lines are parallel, they have __

Linear Algebra help please

Let B={1, 1-x, 2-4x+x^2, 6-18x+9x^2-x^3} and p(x)=7-8x+3x^2 Find [p(x)]B Please leave as many details as you can so I can fully understand. Thanks so much for the help!-From your previous post: http:/

After squared and cubed what comes next? And then

the terms please and thank you-to the fourth power, to the fifth power, ...-No special terms after cubed. 4th power, 5th power, 6th power ...-hypercubed??-Nothing.