The diameter of a planet is about 29,814 mi. The diameter of the planet's moon is about 21% of the diameter of the planet. What percent of the volume of the planet is the volume of its moon?

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?