The zone where the pitcher tries to throw her pitches
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Diana is practicing her pitching. She rotates pitching from the mound with the other pitchers on the team. Diana throws 20 pitches each time she rotates to the mound. Her coach said she must throw more than 400 pitches in the strike zone during today’s practice. How many rotations must Diana take if a total of 20 of her pitches miss the strike zone?
Someone Please help!