Answer:
the first term is a1
the 8th term is a8
the 4th term is a4
we have:

with a1 = 0,002 => a4 = a1.3³ = 2.27 =54
Step-by-step explanation:
Answer:
none
Step-by-step explanation:
not sure but the answer is 40 cause 12-7=5 10x3=30 and 3+2=5 and 5+30+5=40
Answer:
42$
Step-by-step explanation:
So there's an easy way to know this.
100%--$70
60%--x
<em>cross multiply </em>
100x=4200
÷100 ÷100
______________
x=42
So he saved 42$. Hope this helps :D