SOLUTION: okay...so my next question: Calculate the area in metric units: Find the difference in the area of a straw with a diameter of 5mm and a straw with a diameter of 7 mm. (show your

Algebra ->  Surface-area -> SOLUTION: okay...so my next question: Calculate the area in metric units: Find the difference in the area of a straw with a diameter of 5mm and a straw with a diameter of 7 mm. (show your       Log On


   

Question 154550: okay...so my next question:
Calculate the area in metric units:
Find the difference in the area of a straw with a diameter of 5mm and a straw with a diameter of 7 mm. (show your work)
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
Remember:
A=pi%28d%5E2%29%2F4 -------------------------------> working eqn
For 5mmsigma:
A%5B1%5D=pi%285%5E2%29%2F4
A%5B1%5D=19.625mm%5E2
for 7mmsigma:
A%5B2%5D=pi%287%5E2%29%2F4
A%5B2%5D=38.465mm%5E2
The difference: A%5B2%5D-A%5B1%5D=38.465-19.625=18.84mm%5E2
Thank you,
Jojo