anonymous one year ago Find a function that models the area of the window

1. anonymous

2. anonymous

i need help trying to solve this.

3. triciaal

Area of window = area of semi-circle plus area of the rectangle

4. triciaal

perimeter means sum of lengths all the way around the figure circle the circumference 2 pi r where r is the radius rectangle 2 times the length + 2 times the width

5. triciaal

|dw:1434950930565:dw|

6. triciaal

A = (pi* r^2 /2 ) + (x*h ) can substitute for h from the equation for the perimeter

7. triciaal

do you need #26 also?

8. Isaiah.Feynman

Why would "r" be in the equation for the perimeter of the window. Since its just the distance around the window. Shouldn't it be $P = x+2h+\frac{\pi x }{ 2 }$

9. Isaiah.Feynman

Actually, what I'm hinting at is that you should express in term of x.

10. triciaal

|dw:1434952910031:dw| thought process ok same thing yes express in terms of x since function of x

11. Isaiah.Feynman

Yep. I looked at what you did too quickly.

12. triciaal

also said substitute for h