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<span>The child should receive 217.724mg of medicine. Or rounded the child should receive 218mg of medicine.</span>
The second one. Hope this helps! (You should give the credit to the other person who answered because they helped me out with this.)
A right rectangular prism would have three pairs of identical sides. You need to find the area of each of these sides individually, then add them to find the total surface area of the shape.
The dimensions of the three unique of sides are length x width, width x height, and height x length.
So:
2(6 * 9) + 2(9 * 10) + 2(10 * 6)
2(54) + 2(90) + 2(60)
108 + 180 + 120
= 408 inches^2
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