M Madhu 🎓 Tutor II ⭐ 12.07K Points Q. What is the difference of temperatures at 7 hours and 21 hours ? (A) 0°F (B) 1°F (C) 2°F (D) 3°F 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (A) 0°F