What is the ratio of the circumferences for two circles with areas 6π m and 150π m?

The ratio of the circumferences equals the ratio of the radii.

 so we need to find their radii

 first circle's radius:
pir^2 = 6pi
r = √6

 second circle's radius:
pir^2 = 150pi
r = √150

 Their ratio is
√6 : √150 =
√6 : √6√25 =
√6 : 5√6 =
1 : 5

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

can you rephrase the question ? it is unclear : -)

step-by-step explanation: