SOLUTION: vi.A function gives the value of C as 2 × (22/7) × r. Find C when r = 7 cm and r = 91 cm. Would someone please help me out with this problem please?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: vi.A function gives the value of C as 2 × (22/7) × r. Find C when r = 7 cm and r = 91 cm. Would someone please help me out with this problem please?      Log On


   

Question 197929This question is from textbook
: vi.A function gives the value of C as 2 × (22/7) × r. Find C when r = 7 cm and r = 91 cm.
Would someone please help me out with this problem please? This question is from textbook

Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
C+=2+%2A+%2822%2F7%29+%2A+r Note that 22/7 is often used an approximation for pi. So this equation looks a lot like the equation for the Circumference of circle as a function of the radius.
You are asked to find C, when r = 7cm and r = 91cm
C+=2+%2A+%2822%2F7%29+%2A+r Do 7 first
C+=2+%2A+%2822%2F7%29+%2A+7
C+=2+%2A+22
C+=+44 cm
C+=2+%2A+%2822%2F7%29+%2A+r Now do r=91
C+=+2%2A+%2822%2F7%29+%2A+91
C+=+2+%2A+22+%2A+13
C+=+571 cm