I am the mathematics teacher for the Specialized High School section at IP Kids Our goal this summer is to familiarize the students with the type of questions that will be given on the New York City Specialized High School Test. The test will be given on the first weekend in November 2009.
If you have any questions or concerns, please email me at Jsorocco@gmail.com
First, you multiply 2.5 and the formula for circumference which is 2(pi)r. The product is 5(pi)r. 5(pi)r is the area so it becomes like this.
ReplyDelete(pi)r^2 = 5(pi)r
Divide both sides by (pi)r
r=5
Very good Victor.
ReplyDeleteP=(Pi)r2
ReplyDelete(Pi)r2=2.5(2(pi)2)
P=2.5q
(Pi)r2 = 5(pi)r
------ ------
(Pi)r (Pi)r
----------------
r=5