Posted by **.** on Monday, July 15, 2013 at 6:23pm.

alex estimates that if he lies in the sun for k hours it will take him (10+10k) to get to sleep at night because of the sunburn

. If Alex wants to get as much sun as possible without taking more than half an hour to get to sleep, how many HOUR CAN he lie in the sun?

A 1/2

B 1

C 2

D 2 1/2

E 3

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