#### Answer

A) 2.2 x 10^-6
B) 1.59 x 10^-2
C) 6.9 x 10^4

#### Work Step by Step

We move the comma in the denominator to make the division more easy. We then divide the numbers before the exponent part separately, and then divide the exponent by subtracting the numerator value from denominator value.
We rearrange the numbers to have the same exponent part, and then we simply make a common addition and subtraction.
We first rearrange the numbers to make it easier for multiplication and division, and then make the calculations. At the end, we round the number to 3 significant figures, since number with fewest significant figures has 3 of them.