Simplify. Write each answer in scientific notation

Question

simplify write each answer in scientic notation (8•10^-1)(7•10^-2)

Answer 1

the answer is 7 times eight, times ten to the -3.  But then we must make an adjustment because the decimal part (56) needs to be < 10, so we make it 5.6; to compensate (because we just multiplied by 10^-1 when shifting decimal point), we multiply the 10^-3 by 10.

 

final answer: 5.6X10^-2