Anyone knows how to find x for number #7 & #8 ?

You download a video game to your computer. you have a 60-minute free trial of the game. it takes 5 1/6 minutes to set up the game 7 1/3 minutes to play each level. you want to find out how many levels you can play for free.which inequality describes the number of levels, l, you can play in 60 minutes? can you play 6 levels during your free trial? i need ,

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base