Mathematics

Calc 3 Help!! cylindrical coordinates and integral!!

Use cylindrical coordinates to compute the integral of f(x, y, z) =(x^2+y^2)^.5 over the region described by x^2+y^2 Please Help!! Thanks!!! -Converting to cylindrical coordinates yields x^2 + y^2 =

Calculus 3 Help Please! Lagrange Multipliers!!

Use Lagrange multipliers to determine the maximum value of f(x, y) = 2x − 3y subject to the constraint x^2 + 2y^2 = 4.-Let f(x,y) = 2x - 3y subject to g(x,y) = x^2 + 2y^2 = 4. By Lagrange Multipliers

Differential Equations of the form dy/dx = g(y)

A balloon is expanding at a rate that is inversely proportional to its volume (V cm^3) at any time t seconds. That is, dV/dt = k/V, where k is a constant. If the initial volume is 10 cm^3 and after 5

Average temperature math question

For 4 days, the temperatures in Alaska at 9:00a.m were 12, -2, -6, and 8, 4, respectively. What was the average temperature? Do I add all the numbers and then divide them by 5 or 4? How can I solve t

My math autobiography

For geometry im suppose to write a 2 page paper on my math autobiography..I really have no idea what she means, like write about all my math experience and whatnot? Im not sure how that would fill 2 p

Find the slope (calculus)

how do i find the slope for the following equation y=x^3-14xp (1,-13) it got this far h^3+3h^2+3h+1-14-14h-1+14 h^3+3h^2+3h-14h h(h^2+3h-11)/h h^2+3h-11 h(h+3)-11-Ah, thats the limit definition of the

Initial value problem y'-y/x=x/(1+4*x^2)

I need help with the following example; It is initial value problem. y-y/x=x/(1+4*x^2) your help is much appreciated.-y + (-1 / x) y = x / (1 + 4x^2) Well, this isnt an IVP since there arent any i

Let f be a linear function where f(2) = -5 and f(-3) = 1. Find f(x).

I really do not understand what the question is for this and I am not trying to cheat, I just need to know how to solve this, thank you.-The given information tells you that the graph of the function

Simple Logarithmetics

Please explain how you reached to the answer. Answers are in brackets. Many thanks! 1) 8(2x - 1)^3 = 125 [ANS:7/4] 2) 2^(x-1) - 2^x = 2^-3 [ANS: no solution] 3) 3^(x+1) + 3^x = 36 [ANS: 2] 4) log(bas

Volume of rotated polar curve

What is the general formula for the volume of rotated polar curve? Is it just the integral of pi*radius^2 ds, where ds=sqrt(r^2+(dr/dtheta)^2)? if r=theta is rotated about the x-axis, why is ds=cos(t

Two Angles of a triangular sail measure 65 degrees nd 40 degrees what is the measure of the third angle sail

Two Angles of a triangular sail measure 65 degrees nd 40 degrees what is the measure of the third angle sail ?-75 degrees-Since the sum of the interior angles of a triangle equal 180 deg, if x is the

Three determining future value problems?? precalc

Help with anyone of these would be great! 1. The future value of an annuity with payments of $300 at an annual interest rate of 6% for 12 years in which interest is compounded 4 times per year is ..

What is discrete mathematics

I am taking a Discrete Math class in college next semester and I have no idea what to expect. What kinds of questions will I be asked? What are the major topics (i.e. taylor series and integrals in ca

Calculus Doomsday Problem

Ok, I pretty much have part A and C down (or I have an idea on how to do them) but I might need some help over part B. Anyways, here is the question with all parts Let c be a positive number. A diff

Can anybody help with this algebra formula question? ☺

Help! Urgent! heres a description of what needs to be done: evaluate the following formulas. use the given values to find the values of the remaining variables. a=x+y+z/3 a=6 x=9 y=2 find z z=? 10 E