Can you write all of these (a, b,c, d) as decimals?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.