An object is moving at a speed of 390 centimeters per hour. Express this speed in kilometers per week. Round your answer to the nearest hundredth.

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?