7 1025 X 1250 X 1000005 Simplify the expression A 1281256406

  7. 10.25 X 12.50 X 1,000.005       Simplify the expression

           A. 12,812.5640625

           B. 1,281,256.40625

           C. 1,281.25640625

           D. 128,125.640625

Solution

10.25 X 12.50 X 1,000.005

writing each numer in terms 10^exponent

10.25 = 1025 x 10^-2

12.50 = 1250 x 10^2

1000.005 = 1000005 x 10^-3

Now multiplyin all the terms: 10.25 X 12.50 X 1,000.005 = 1025 x 1250 x 1000005 x 10^(-2-2-3)

= 1281256406250 x 10^-7

=128125.640625

Option D