Answer:
V≈169.65
Step-by-step explanation:
L = (1⅕)W= (6/5)W
LW = 480 in²
(6/5)W² = 480
W² = 480 × ⅚ = 400
W = 20 in
L = (6/5)W =24 in
Answer:

Step-by-step explanation:
The nth term of the sequence is

To get the first term, substitute n=1,

To get the second term, substitute n=2,

To get the third term, substitute n=3,

The sum of the first three terms is

We could also use the formula
to get the same result.