For the first one...look at this graph :
https://www.desmos.com/calculator/hdxexyl2qy
Max ht ≈ 6.2 cm
Length of jump ≈ 9.1 cm [second answer ]
(3 - i) - ( 2 + 6i) =
3 - 2 - i - 6i =
1 - 7i
Which question do you want to delete???......send me the link and I'll delete it for you