Which set of numbers is arranged in the descending order?
7 times 10^-30, 7.2 times 10^-25, 7.2 times 10^-30,7+ 7.6 times 10^-25
7.6 times 10^-25, 7.2 times 10^-30, 7.2 times 10^-25, 7 times 10^-30
7.2 times 10^-30, 7 times 10^-30, 7.6 times 10^-25, 7.2 times 10^-25
7.6 times 10^-25, 7.2 times 10^-25, 7.2 times 10^-30, 7 times 10^-30