Cs-124 has a half-life of 30.8 s. (a) If we have 7.8 μg initially, how many Cs nuclei are present?

Given:

The length of a rectangle is 3 inches less than three times its width.

The perimeter of the rectangle is 34 inches.

To find:

The dimensions of the rectangle.

Solution:

Let x be the width of the rectangle. Then, the length of a rectangle is 3 inches less than three times its width.

Length of the rectangle = 3x-3

Now, perimeter of the rectangle is

The perimeter of the rectangle is 34 inches.

Divide both sides by 8.

The value of x is 5. So, width of the rectangle is 5 inches.

Therefore, the length of the rectangle is 12 inches and the width of the rectangle is 5 inches.