Technetium -99m is used by doctors on patients when needing to x-ray and track organ function. It has half-life of approximately 6 hours. If a patient is given 1000 mg for a procedure, in how many hours will 62.5 mg of Technetium-99m remain in the blood stream.

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?