yg A sama E ada yg tau gak?? yg tau please jawab ,kasih jawabban terbaik deh

a) 10'8 = 100.000.000
b) 5'8 = 5'4 x 5'4 = 625 x 625 = 390.625
C) -10'6 = -(10'6) = -(1.000.000) = -1.000.000
d) 2'4 x 10'7 = 16 x 10'7 = 160.000.000
e) (-2)'4 x (-3)'5 = 16 x (-243) = -3.888