Christy spent $500 over her budget on gifts during the holidays. in addition to her regular job, she took a part-time job at the pharmacy that paid $10 per hour. how many hours will christy have to work at the pharmacy to pay off the holiday debt?

Math it's appreciated. (picture provided)

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m