12 x 8 x 5 = 480 cubic inches
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314 square inches in total
To find the volume of a box, you multiply its length, width, and height. In this case, the box is 4 inches long, 3 inches wide, and 5 inches high. Therefore, the volume of the box would be 4 x 3 x 5 = 60 cubic inches.
a^2 + b^2 = c^2. Therefore, the hypotenuse is (5^2 + 12^2)^1/2
The scale of the house is the ratio of the model to the actual house. This ratio will be the same for both directions, or else the model would be useless. 6 inches is .5 feet, so the ratio is .5:30. You always want to write ratios as 1:something, so we double both side of the ratio and get 1:60. Likewise, 12 inches is one foot, so the ratio is 1:60 for the other dimension as well, as it should be.
Density is mass divided by volume. A brick is a rectangular prism, the volume of which is length * height * width. 7000 grams / (4 * 5 * 3) = 7000 / 60j = 116 2/3 g/cubic inch