Giving Brainlist: I don't know what the answer is or how to solve it. HELP PLEASEEE

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 a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2