What is one way to remember that one-fourth is the same as 0.25? next, explain how 1/2 is the same as 0.5.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Im so bad at fractions they are not my best math thing to work on

What is ha theorem a special case of?