I believe you meant - <span>16t^2 + 604 ft. If you leave that - sign out, this function will never equal 348 feet.
-16t^2 + 604 = 348 can be solved:
-16t^2 = -256 ft, and t = 16 sec. Whatever you are throwing will first rise, reach some max. value, and then begin falling, and eventually reach 348 ft.</span>
The Associative Property is true for all multiplication problems. This means that this could be written as (5*23)*2, or 5*(23*2), or even 5*2*23.
There are ten possible digits (0 to 9).
If they can be repeated, you're looking at 10 * 10 *10 * 10 * 10, or 105
This means 100000 possible zip codes if repeatable.
If not, you're looking at one less each time:
10 * 9 * 8 * 7 * 6
90 * 56 * 6
540 * 56 = 30240 zip codes without any repetitions.