Tell whether the function y=2 cos (x^2) is periodic or non-periodic

Find the value of x for which the lines are parallel.

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Pls brainliest will be awarded if answer is correct