Express the following in conventional notation:

a$)8\mathrm{.}43105$

b$)256\mathrm{.}910-8$

Express each of the following in scientific notation:

a$)0\mathrm{.}00000690$

b$)97,530,000,000$

c$)24\mathrm{.}7$ millionths

d$)64\mathrm{.}3$ billion