+458 Sandy cut out 2 squares and 7 circles from a piece of cardboard. The length of the sides of each square was x inches and radius of each circle was y inches. The expression below shows how many more square inches of cardboard Sandy used for making the circles than the squares:
7πy2 - 2x2
What does the term 7πy2 in the expression represent?
The total area of 7 circles
The total area of 22 circles
The total area of all the shapes
The total area of all the squares
+129898 DS and rosala.......I think rhat both of you might be able to do this one........give it a try!!!!
+8262 I used the calculator.
{piy=-(((sqrt(2)*x)/sqrt(7))), piy=((sqrt(2)*x)/sqrt(7))}
+129898 Think about this guys.....what's the "formula" for the area of a circle with a radius of "r" ???
What would be the way to find out the area of 7 of these circles???
+129898 You're correct DS......7*pi*y^2 would be the answer for the area of 7 circles !!!
good job !!!
+11912 Good job DS!
Btw CPhill i too was thinking the same answer but just got a lil confused!
+8262 Thanks, Chris! And thanks, rosala! I just thought it back and forth, and I read it millions of times. And that's how I think I got the answer. But, thanks, CPhill!
