Question 1123697

a. 

{{{2*8*7*7*7*8}}}

as you can see abowe, you have one time {{{2}}} which is same as {{{2^1}}}, 

you have  {{{8*8}}}, same {{{8^2}}}, and

you have  {{{7*7*7}}}, same {{{7^3}}}

then

Exponential notation:  {{{2*7^3*8^2}}}   
Decimal Notation:{{{43904}}}


b. 

{{{7*7*7*7*6*3}}}

Exponential notation: {{{3*6*7^4}}}    
Decimal Notation:{{{43218}}}