Answer:
-8 km
Step-by-step explanation:
Answer:
Step-by-step explanation:
a₁ = 15
a₂/a₁ = 45/15 = 3
a₃/a₂ = 135/45 = 3
...
It is a geometric sequence with a common ratio r=3.
Sum of first 12 terms = a₁·(1-r¹²)/(1-r)
= 15·(1-3¹²)/(1-3)
= 15·(-531,441)/(-2)
= 3,985,800
Answer:
8 years old
Step-by-step explanation:
oldest= 16
8+12+15+16= 51
51/4 = 12.73 ( average)
Answer: 35000/20000=1.75 pound
Step-by-step explanation:
The LCD of 11/20 and 31/45 is 180
20 40 60 80 100 120 140 160 180
45 90 135 180
