What do these five actors/actresses have in common?

- Julia Roberts
- Jason Bateman
- Bruce Willis
- Angelina Jolie
- Vincent Dâ€™Onofrio

Does 9 appear as the leftmost digit in the decimal representation of any power of 2?

Does 7 appear as the leftmost digit in the decimal representation of any power of 37?

Is it possible to find a power of any counting number that has a given digit as its leftmost digit?

Also, is it possible to find a power of any counting number that begins with a given *series* of digits (*e.g., is there a power of 24 that begins with 937*)?

Prove that this is possible, or give a counter-example.

Bonus: What percentage of the powers of 2 have 1 as their leftmost digit?

*Note: In finding the powers of "any counting number," exclude powers of ten, whose leftmost digit is always 1.*