8. Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun. (i) A sunscreen with SPF 15 allows only ) A of the sun's UV rays. What per cent of UV rays . 15 does the sunscreen abort? (ii) Suppose, a sunscreen allows 25% of the sun's UV rays. What fraction of UV rays does this sunscreen block? Give your answer in lowest terms. (iii) A label on a sunscreen with SPF 30 claims that the sunscreen blocks , about 97% of harmful UV rays. Assuming the SPF factor is accurate. Is this claim true. Explain.
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yes dude it's True ..........
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