Chapter 1.04

#3
#4

#7
#8
#9
#10
#11
#12 WEP

#15 WEP
#16
#17
#18 WEP

#21
#22 WEP
#23 WEP

#25
#26

#28
#29
#30

#32 (a good one to try on desmos.com )
#33 (also good on desmos.com )
#34 WEP

#36

#38

QA: optional but cool: based on #36: type into Wolfram Alpha: 
i) play sin(4400*2*pi*sqrt(t)) for 2 seconds
ii) play sin(44*2*pi*t^2) for 10 seconds