Answer:
diamond I think not 100% sure but I looked it up
21²+28²=c²
√1225=c
35 miles - distance of the boat to its starting point
2/4 of an hour is half an hour so 2/4 of an hour is 30 minutes. Hope it helps
Answer:
Exact Form: 15/2
Decimal Form: 7.5
Mixed Number Form: 7 1/2
Step-by-step explanation: