Hello :
<span>-1.5+k=8.2
k=8.2+(+1.5)..... (+ 105 no : - )
k=.....</span>
Answer:
Second option is the correct answer.
Step-by-step explanation:

13 - 4/7 = <span>12.4285714286 Or when you round it 12.43</span>
I believe the lateral surface area is 87.96.
Answer:
Last option is the correct choice.
Step-by-step explanation:

Best Regards!