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Answer:
8) 4
9) 16[tex]\pi[/tex] OR 50.26548
10) 109.73452
Step-by-step explanation:
8) 8 ÷ 2 = 4
9) [tex]\pi[/tex] × 4² = 16[tex]\pi[/tex] OR 50.26548
10) 8 × 20 = 160
160 - 50.26548 = 109.73452