The distance between neptune and the sun is 30.06 au. what is this distance in millions of kilometers? (one au is about 150 million kilometers.)

The distance between the Sun and Neptune in kilometers is 4,509 kilometers.
You just multiply the two numbers :))

Ithink the dna sequences may vary but the amino acid sequences are identical. 

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass