It telephone technician charges $40 per hour plus $45 service charge your father's firm hires him to hook up his company's phone system.
find the total charges if it takes the telephone technician 4.5 hours to complete the task

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.

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

If 25% of y is 30, what is 60% of y?