Li needs 15 pieces of string each 1/2 of a inch long . She cut a 6 inch piece of string into pieces that are each 1/2 of an incch long . How many more pieces of string does she need?

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

If 20% of a number is 35, what is 50% of that number?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)