precalculus midterm review solutions

Timestamps for all the problems:
01 0:00:55
02 0:01:35
03 0:02:37
04 0:03:26
05 0:03:52
06 0:04:42
07 0:05:09
08 0:06:06
09 0:07:29
10 0:07:55
11 0:09:22
12 0:09:53
13 0:10:18
14 0:10:44
15 0:11:10
16 0:11:43
17 0:11:53
18 0:13:58
19 0:15:39
20 0:17:35
21 0:20:00
22 0:22:10
23 0:26:29
24 0:28:10
25 0:35:02
26 0:38:41
27 0:44:28
28 0:47:26
29 0:50:07
30 0:52:50
31 0:55:04
32 0:56:38
33 0:59:35
34 1:06:25
35 1:16:40
36 1:30:33
37 1:34:33
38 1:35:52
39 1:37:30
40 1:40:29
41 1:42:53
42 1:48:14
43 2:02:11
44 2:04:27
45 2:10:52
46 2:13:58
47 2:16:51
48 2:19:24
49 2:22:38
50 2:28:32
51 2:39:30
52 2:43:07
53 2:50:18
54 2:54:33
55 2:57:15
56 2:59:34
57 3:07:32
58 3:11:11
59 3:16:39
60 3:24:47
61 3:28:03
62 3:30:27
63 3:32:33
64 3:34:17
65 3:37:55
66 3:42:08
67 3:50:58