1. How many of the numbers 2^1, 2^2, 2^3, ..., 2^100, written in base-ten notation, have a ones digit of 6? 2. Michael wants to mail a package using exact postage. If he chooses only 23-cent stamps, he needs 9 more stamps than if he uses only 32-cent stamps. How many dollars will it cost Michael to mail the package? Express your answer to the nearest cent.

Please answer ASAP. Tysm!