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Cheng

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A wall 9ft high cast a shadow of 15ft. Find the angle of the sun rays with the ground.
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2. 473 views
In a farm, the farmer counted 78 legs and 35 heads consisting of cows and hens. How many hens does he have?
1. 3 answers
2. 4,572 views
A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball
1. 3 answers
2. 7,982 views

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