67.5 billion in scientific notation

Name the most appropriate metric unit for each measurement like a length of an carrot

Describe the relationship between the angles of similar triangles and the sides of similar triangles

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?