Answer:
a. The Decimal System
Explanation:
The Decimal System, is one of the great mathematical innovation form ancient India. There is no clear date and place about the invention the decimal system.
It was first recorded in India, then spread to Islamic world, and further to Europe. Decimal system gave a unique turn to the world of mathematics and made the counting or measurement easy.
Hence, the correct answer is "a. The Decimal System".
Answer:
https://www.energy.gov/articles/history-light-bulb
Explanation:
Just over 50 percent of adult Americans engage in aerobic physical activity that meets the national guidelines.
More about aerobic physical activity:
Exercise that relies primarily on the aerobic energy-generating mechanism is known as aerobic exercise, often known as endurance exercises, cardio, or cardio-respiratory exercise.
According to the dictionary, the term "aerobic" refers to the use of oxygen to appropriately provide the energy demands of aerobic metabolism during activity.
Benifits of aerobic physical activity:
- Increases the strength of the breathing muscles to make it easier for air to enter and exit the lungs.
- Increases blood flow efficiency and lowers blood pressure
- Increases sensitivity to pain
- Keeps independence during old age
Learn more about aerobic here:
brainly.com/question/2315675
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