Is 1682 an natural number

Ineed with number 17 i don’t get it at alll

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?