Find the value of the variable.

Somone me i want to know what 18 hours out of 24 hours in a fraction

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base