Circumference of a semi-circle with diameter 30

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.

5(-9w) put expression in distributive property

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined