Question

Which expression shows the area of the shaded part of the grid? A hundred grid model showing a 7 4 array shaded blue. A. 0.04 × 0.07 B. 0.5 × 0.7 C. 0.4 × 0.7 D. 0.3 × 0.6

Answer 1

`C.\ Area = 0.4 * 0.7`

Explanation:

See attachment for grid

From the attachment:

There are 10 cells on the horizontal axis and there are also 10 cells on the vertical axis.

This implies that, the measurement of each cell is:

`Each\ Cell = (10)/(10 * 10)`

`Each\ Cell = (1)/(10)`

`Each\ Cell = 0.10`

The horizontal axis has 7 selected cells.

This measures

`Horizontal = 7 * 0.10 = 0.70`

The vertical axis has 4 selected cells.

This measures

`Vertical = 4 * 0.10 = 0.40`

So, the selected area is:

`Area = Vertical * Horizontal`

`Area = 0.40 * 0.70`

or

`Area = 0.4 * 0.7`