What is the answer to this question

Answer:Step-by-step explanation:a-= 7.2 × 10-8 (scientific notation) = 7.2e-8 (scientific e notation) = 72 × 10-9 (engineering notation) (billionth; prefix nano-(n)) = 0.000000072 (real number)b-= 6.3 × 10-9 (scientific notation) = 6.3e-9 (scientific e notation) = 6.3 × 10-9 (engineering notation) (billionth; prefix nano- (n)) = 0.0000000063 (real number)c- = 4.56 × 10-5 (scientific notation) = 4.56e-5 (scientific e notation) = 45.6 × 10-6 (engineering notation) (millionth; prefix micro- (u)) = 0.0000456 (real number)d- = 7.041 × 10-10 (scientific notation) = 7.041e-10 (scientific e notation) = 704.1 × 10-12 (engineering notation) (trillionth; prefix pico- (p)) = 0.0000000007041 (real number)