The temperature at noon is 75f. the temper urge drops 3 degrees every half hour. what is the tempeture at 4pm?

At 4pm, the temperature has droped 8 times
Total drop = 3 x 8 = 24 degrees

At 4pm, the temperature is 75 - 24 = 51f

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8