exam Maths Puzzle Numerical Ability

Please help me solve this equation: g(x)= sq.root of x+21

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exam Other Question

Well, there were no questions submitted for this area. I wish these questions were out of a textbook because then I would have an example that I could follow, but they are not. As a shipping box measures 14 1/2 inches long by 9 1/8 inches wide by 8 11/16 inches high. What is the volume of the box in cubic feet
95.79 ft3
0.67 ft3
0.02 ft3
0.78 ft3