Answer:
14.3 feet
Step-by-step explanation:
See attached photo for work...
44
k=1: 2*1-4 = -2
k=2: 2*2²-4 = 4
k=3: 2*3²-4 = 14
k=4: 2*4²-4 = 28
-2 + 4 + 14 + 28 = 44
A. n ( 15.n - 2 )
eg n = 2
2 ( 15.2 - 2)
2 ( 30 - 2)
2 (18)
36 = 18 + 18
576.6
Answer: The area is 5024 yrd^2
80 is the diameter to we need to divide it by 2 to find the radius
80/2= 40
A= 3.14* 40^2
A = 3.14 * 1600
A= 5024
