In a coin factory, a machine takes 2kg block of zinc. It then divides this into rectangles each weighing 8g. These rectangles
are then stamped into discs of zinc each weighing 5g with the
remaining zinc discarded.
These zinc discs are then stamped with collectable designs and
next packed into bags of 6 which are sealed and finally packed
into boxes, each containing 4 bags ready for delivery to various
coin collecting shops.
What percentage weight of zinc out of the original block will
be contained in all of the COMPLETELY FILLED boxes
combined? (i. e. those containing a full 4 bags)

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes