(adsbygoogle = window.adsbygoogle || []).push({}); Help with Functions!!

Hi everone this is my first thread and I am looking forward to particitate in PF. Anyways I need help with a question...although I found a solution but I am not sure if it is right..any help would be greatly appreaciated.

Question - A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 30ft, express the area A of the window as a function of the width x of the window.

Solution - 2x+2y=30, solvin for y; y=15/2-x

A=Rectangle + semicircle

A=xy + "pi"(x/2)^2

A=x(15/2-x)+"pi"x^2/4

A=15x/2-x^2+"pi"x^2/4

Well....it looks pretty simple but last assignment I did, I got a low mark and I screwed up in many places....so I just want to make sure it doesnt happen again...thanks in advance.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with Functions

**Physics Forums | Science Articles, Homework Help, Discussion**