Answer:
Pencil
Step-by-step explanation:
The perimeter is all the sides added up. Therefore, the answer would be the smallest object, being the pencil.
The determinant of given matrix is zero
Step-by-step explanation:
Given matrix is:
![\left[\begin{array}{ccc}1&4&4\\5&2&2\\1&5&5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%264%264%5C%5C5%262%262%5C%5C1%265%265%5Cend%7Barray%7D%5Cright%5D)
The determinant of a 3x3 matrix is calculated by selecting a single row.
We are choosing the first row.
So,

The determinant of given matrix is zero
Keywords: Matrices, determinant
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Answer:
The actual building will be 7.5 m tall
Step-by-step explanation:
Given the scale model value of the building, we want to find the actual height of the building
From the scale model;
1 cm = 0.5m
Thus 15 cm will be 15 * 0.5 = 7.5 m