W1 subtitle errors

I noticed some mistranscriptions in the transcript (subtitles, captions) for the course videos. Below is the errata for the first week. I’ll post the errata for the other weeks in those groups.

The format for the errata is as follows. The approximate time is in braces, then the mistranscribed word or phrase follows, followed by a hyphen, then followed by the correct word or phrase. So like this:

[time] mistranscribed word or phrase - correct word or phrase

Video 7 - Inference: making predictions (forward propagation)
[2:40] safe point - sigmoid

Video 9 - data in tensor flow
[4:46] Enough - in math
[5:27] Right - write

Video 12 - General implementation of forward propagation
[6:46] Sophie - certainly

Video 13 - Is there a path to AGI?
[5:47] here - hear
[8:35] average of users - algorithm it uses

Video 15 - matrix multiplication
[9:10] upper Z - output z

Video 16 - matrix multiplication rules
[1:45] Roles - rows

Video 17 - matrix multiplication code
[2:14] 217 - 200 17
[4:07] bases - basically

Thanks much.