How do you write expanded form with powers-five hundred million and four-tenths?

Answer 1

500,000,000.4 = (5 x 1010) + (0 x 109) + (0 x 108) + (0 x 107) + (0 x 106) + (0 x 105) + (0 x 104) + (0 x 103) + (0 x 102) + (0 x 101) + (0 x 100) . (4/101)