Isuck at fractions any tips on how to do it

In the film, zeke the zombie slayer versus the zombies from space, zeke slayed 140 zombies. in the sequel, zeke the zombie slayer versus the zombies from space, part 2, he slayed 5% more zombies. how many zombies were slain by zeke in the sequel?

What is the value of the expression below? (81^2)^1/8

What value of x will make the triangles similar by the sss similarity theorem?