To find the length, divide the area by the width:
7.7682 x 10^4 / 2.42 x 10^2
Hen dividing scientific numbers, divide the real numbers and then subtract the exponents:
7.7682 / 2.42 = 3.21 ( since there is only 1 number to the left of the decimal point, we don't need to worry about converting it to scientific order).
4-2 = 2
The answer becomes 3.21 x 10^2 cm
