add then simplify.by collecting like radical terms if possible assuming that all expressions under radicals represent non negative numbers:

√5a + 2√45a^3

1 answer

Suppose that the volumes of four stars in the Milky Way are 2.7 × 1018 km3, 6.9 × 1012 km3, 2.2 × 1012 km3, and 4.9 × 1021 km3. What is the order of the stars from least to greatest volume?