I WILL MAKE YOU BRANLYIST! –(–3) it was on a question and I don't know what to do

Given a circle with measures of (c, d, and r) and a circle with measures of (c', d', and r'), what is d if c c' = 12 and d' = 0.50? a) 3 b) 6 c) 12 d) 24

For what values of x is x2 + 2x = 24 true?

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions