The ASVAB Tutor Presents Mathematics Knowledge Question on Circumference and Area of a Circle

Mathematics Knowledge

Today I presented a question about the area and circumference of a circle.

If the area of a circle is 9p, what is the circumference?  This type of question is one that could appear on the Mathematics Knowledge section of the ASVAB.  In working as an ASVAB tutor, I provide my students with the necessary formulas for the Mathematics Knowledge section of the ASVAB.  The formulas include formulas for area, circumference, volume, and surface area.  Do you know how to solve this problem?  I will present the answer tomorrow.