“seasonal furnace maintenance is essential to make sure your furnace is running efficiently and safely. a furnace that is not running at peak performance can be deadly due to the production of toxic gas. name this toxic gas and describe its effect on a red blood cell.”

Unsure but it may be Carbon Monoxide because it replaces oxygen in your red blood cells meaning you have less oxygen supply.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

catya that's not even a b or c