Which of these involves a mathematical formula to visualize a three dimensional space on a two dimensional surface?.

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. how many hours after the truck's departure will the two meet?

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase