Question

Item 5 How many of the chemicals created when tobacco burns are known to cause cancer? about 30 about 50 about 70 about 90

Answer 1

Answer:

about 70

Explanation:

At least 69 of these chemicals are known to cause cancer, and many are toxic.

Answer 2

Answer:

70

Explanation:

tobacco smoke is made up of more than 7000 chemicals, including over 70 known to cause cancer (carcinogens)