HELP ME ⚠️READ THIS BEFORE YOU ANSWER⚠️

I did this work and I got it right, the only thing I need is an explanation for why is period 4 better.
The rest is correct, use that to help your answer.

Jamie is hiking up a small mountain. he climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. after that, he hikes down at the same rate to the base of the mountain. the equation that models jamie’s elevation, e, after t hours is e = . jamie’s elevation will be 600 feet after hours and after hours.

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).