Answer:
a) 0.000000072
b) 0.0000000063
c) 0.0000454
d) 0.0000000007041
Hope this helps :)
Hi there!! (✿◕‿◕)
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A.) 7.2 x 10^-5 = 0.000000072
B.) 6.3 x 10^-9 = 0.0000000063
C.) 4.54 x 10^-5 = 0.0000454
D.) 7.041 x 10^-10 = 0.0000000007041
Hope this helped!! ٩(◕‿◕。)۶