. A man takes a walk near the end of the day on which he crosses two bridges. (a) As he crosses the first bridge, he decides to drops a stone into the water below. The fading daylight allows him to see the stone hit the water 4 seconds later. What is the height of the first bridge (in feet)?

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.