Step-by-step explanation:
The number of subsets=2ⁿ where n=4 members
2ⁿ=2⁴=16
Number of proper subsets=2ⁿ-1
16-1=15
Answer:
15.7
3.14(5)
D: 120
30/50 = 120/200
the length is 94 meters
hope this helps