Question

On a sunny day mark can stay in the sun for 20 minutes before he gets sunburnt. He wants to sunbathe for 3 hours. What is the lowest level of sun protection that he should use : 5, 15, 20, 30, 50
Also the question below

Answer 1

For the 1st question, 30. Not too high, not too low. 
2nd one is Their bodies are used to it and it's the way they were made, so lets say a (NOT BEING RACIST!!!!) let's say a white person and a Latino, went out, the white would have a greater risk because their bodies aren't used to the sun more than the Latino!