Pleaase help me because i really need it

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?