Question

The diameter of a human blood cell is about 7 x 10^-3 mm, and the diameter of a grain of salt is about 3 x 10^-1 mm, which is larger by many times. How much larger is the diameter of a grain of salt than a human blood cell?

a) 3 times larger
b) 30 times larger
c) 300 times larger
d) 3,000 times larger

Answer 1

The diameter of a grain of salt is 30 times larger than the diameter of a human blood cell.

Step-by-step explanation:

The diameter of a grain of salt is about 3 x 10-1 mm, while the diameter of a human blood cell is about 7 x 10-3 mm. To determine how much larger the diameter of a grain of salt is compared to a human blood cell, we can calculate the ratio between the two values:

Ratio = Grain of Salt Diameter / Blood Cell Diameter = (3 x 10-1 mm) / (7 x 10-3 mm)

This ratio is equal to 30, so the diameter of a grain of salt is 30 times larger than the diameter of a human blood cell. Therefore, the correct answer is b) 30 times larger.