9 workers take = 92 horus
1 worker will take = 92*9 = 828 hours
5 workers will take = 828 /8
= 165.6 hours
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What is the dot product of vectors A = (2, -3) and B = (5, 7)?
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Math question: In a circle, if an angle at the circumference is twice the size of an angle at the center, what is the measure of the angle at the center?