Multiply 1 over 3 multiplied by 1 over 5. answers: negative 1 over 10 negative 1 over 15 1 over 15 1 over 10

Can someone answer this question? : )

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?

What is the radius of the cone in the diagram? round your answer to the nearest whole number