Help me please i don’t understand how to explain this

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?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

The balance of susu's savings account can be represented by the variable b. the inequality describing her balance b > $30 . which could be a solution to the inequality?