While she is still resting, take her resting heart rate first before you can calculate her target heart rate.
Answer:
matter
Explanation:
"In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings"
The Aromatic hydrocarbon is the most common in nature.
Answer:
A shark's skeleton is made of cartilage , a type of strong but flexible tissue .Most other fish are covered in smooth , flat scales . A shark is covered in sharp , toothlike scales called denticles . Most other fish have flaps over their gills.
Explanation:
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It's when you use something so much that it loses it's value or purpose. But it can also mean making a piece of land more profitable and productive.
