Mathematics, 26.09.2019 23:30 boyettalexandra
Virtually all sunscreen lotions list the spf (sun protection factor), which is an indication of how long you will be protected from sunburn when wearing the sunscreen. the amount of time you're protected is proportional to the spf. if wearing spf 8 sunscreen will protect your skin for 40 minutes, how long will spf 45 sunscreen protect you?
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Virtually all sunscreen lotions list the spf (sun protection factor), which is an indication of how...
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