Answer:256
Step-by-step explanation:
The sequence is alternatingly decreasing and increasing.
3 - 9 = -6
-6 + 18 = 12
12 - 8 = 4
4 + 16 = 20
Therefore, next term will be:
20 - 7 = 13
Answer:
187 layers after 37 hours.
Step-by-step explanation:
since there is 5 very hour and you already have 2 brick layers high your gonna take 5•37+2=187
