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Mathematics, 14.01.2021 16:50 micky956

The roof at a tennis stadium opens 421 inches in 50 seconds. How many inches does the roof open per second?
A.) 0.12
B.) 8.42
C.) 371.0
D.) 471.0
Plz answer this QUIC I need this answer really badly.

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The roof at a tennis stadium opens 421 inches in 50 seconds. How many inches does the roof open per...
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