A fully shaded model represents 100%. Which model is shaded to represent 4/5 ?

(40 points) i need some . an answer definition is appreciated as well.

What is the difference between the predicted value and the actual value

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists