What is the midpoint between 4.7 and 4.8?

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?

Landon wrote that 3−2.6=4. which statement about his answer is true?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.