Find the circumference and the area of a circle with radius 9 cm. Use the value 3.14 for n, and do Not round your answers. Be sure to include the correct units in your answers.

What is the vertex form of f(x) = x2 + 6x + 3

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer