Ineed plz i don not understand this problem

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)