2. hal forgot the number of people at the
basketball game. he does remember that
the number had four digits and a 3 in the
tens place. write a number that hal could
be thinking of

Well there is a lot of different numbers he could be thinking of because we are only given 2 useful pieces of information: Four Digits, and, a 3 in the tens place (30).

.

This means that the other spaces could be any number.

.

If X represents a random number it would be XX3X.

.

Eg 1234

v: l•w•h÷2.

v: 20•6•8 ÷2

v: 960÷2

v: 480