1. John makes $25 per hour as a fitness instructor. He has already earned $50. Use an inequality to find how many more hours he needs to instruct in order to have at least $225. 2. Sam makes $15 per hour as a lifeguard. He has already earned $60. Use an inequality to find how many more hours he needs to instruct in order to have at least $240.

3. A plate weighs ⅓ of a pound. A shelf can hold at most 20 pounds. Use an inequality to find the number of plates that the shelf can hold.