Answer :
Final answer:
The thickness of a cell membrane is 8.0 nm, which converts to 3.15 x 10^-7 inches using the conversion rate of 1 meter equaling 39.4 inches. The choices given in the question do not match this calculation.
Explanation:
The question asks how thick a cell membrane is in inches if it is 8.0 nm thick. To convert nanometers to inches, we can use the given conversion rate of 1 meter equals 39.4 inches. First, we convert the membrane thickness from nanometers (nm) to meters (m) by remembering that 1 meter is 1,000,000,000 nanometers. Therefore, 8.0 nm is 8.0 x 10-9 meters. Then, we convert this to inches using the given conversion rate:
8.0 x 10-9 meters x (39.4 inches / 1 meter) = 315.2 x 10-9 inches
This simplifies to 3.15 x 10-7 inches. However, since this is not an option given in the question, there may be a miscalculation or misprint in the provided choices. It's recommended to check the available options and potentially advise on recalculating if necessary.