Analyze relationships a scale for a scale drawing is 10 cm: 1mm. which is larger, the actual object or the scale drawing: explain

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?

Can someone me do math because i am having a breakdown rn because i don’t get it

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?