Answer:
^geometric sequence^
a2 : a1
=9 : 3= 3
or a3 : a2
=27 : 9= 3
or a4 : a3
= 81 : 27= 3
so, the anwer is yes;3 (b)
-45 - 9n = -81
-9n = -81 + 45
-9n = -36
n = -36/-9
n = 4
Hope this helps you. :)
100000000
Step-by-step explanation:
6 times 10 to the 8th is 600,000,000
5 times 10 to the 7th is 500,000,000
600,000,000-500,000,000=100,000,000
