a) 69,300,000 = 6.93 * 10^7
b) 0.000028536 = 2.8536 * 10^(-5)
c) 129,540,000 = 1.2954 * 10^8
d) 0.00000000014 = 1.4 * 10^(-11)
e) 7,200,000,000,000 = 7.2 * 10^9
f) 0.0001213 = 1.213 * 10^(-4)
g) 7,259,000,000 = 7.259 * 10^9
h) 0.0007029 = 7.09 * 10^(-4)