55+10.00x ≥ 150 x ≥ 9.5 hours I hope that helps
B and C make sense to me.
To find this answer, just divide 360 by 5 to find out how many times his heart beats in one minute instead of 5. Doing this will give you a final answer of 72 bpm.
Answer:
20
Step-by-step explanation:15-5=10 10 x 2 =20
