exponential factors,

;Complete the following calculations and report your answers with the correct number of significant figures. The exponential factors, such as 103, are exact, and the 5280 in part (c) is exact. All the other numbers are not exact.

a. 8.9932 × 10^−2(10^3)0.0048 divided by (10^−6)7.140 =

b. (44.945 − 23.775)(10^3)3.785412 divide by (15.200)(453.59237) =

c. 456.8(5280)^2 divided by (103) 2(1.609)^2 =

show the work please