Answer:
16) 142
17) 23
18) 134
19) 38
Please mark brainliest if this is correct.
r = 12.89
Step-by-step explanation:
18(2) + 15(3) = 81 = C
C = 2πr
81 = 2πr
81/2 = πr
r = 81/2π ≈ 12.89