What's the area and the perimeter of a rectangle 8.7cm long and 3.8cm wide

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

15/16 as a decimal rounded to the nearest hundredth

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?