Answer:
C. 4i
Step-by-step explanation:
√-1 is imaginary number i
Step 1: Write expression
√-16
Step 2: Factor
√-1 · √16
Step 3: Simplify
i · 4
4i
Answer:5/3 + 2/4 = 13 /6 = 2 1 /6 ≅ 2.1666667
3217.00
V=πr^2h=π·8^2·16≈3216.99088
21
Add all the numbers together
6+8+2.5+2.5+2=21
