Raul has $640 saved, and jaime has $320 saved. they each begin a new job on the same day and save all of their money. raul earns $180 per day and jaime earns $200 per day. in how many days will they have an equal amount of money

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?