The letter “o”.

41

Double "the".

Right where you left it!

70

15 + 1x1 = 16
16 + 2x2 = 20
20 + 3x3 = 29
29 + 4x4 = 45
45 + 5x5 = 70

In maps.

The woman's keys were taken away from her earlier in the night. She took an Uber to get home and was without keys to unlock the doors.

A splinter.

Read again the question.
CAREFULLY!!!!!!!!!

"Mitsake" -> Mistake

353
(x*2-1)

Take off your shoes and walk around barefoot :)