Multiple Choice
Melissa uses a sunscreen with an SPF rating of 20. What does this rating mean?
A) She can stay in the sun for 20 minutes without getting tanned or burned.
B) She can stay in the sun 20 times longer without getting burned than if she had not used it.
C) She is protected against the full range of ultraviolet radiation.
D) Her sunscreen contains 20 different ingredients to block ultraviolet radiation.
Correct Answer:
Verified
Correct Answer:
Verified
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