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Mathematics, 30.05.2020 21:00 cbear5626

The SPF (sun protection factor) listed on sunscreen 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 you for 40 minutes, how long will SPF 30 sunscreen protect you?

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