Question

The diameter of a red blood cell is about 0.0008 cm. the diameter of a chicken pox virus is about 1.7x10^-5 cm. what is the appropriate ratio of the diameter of the red blood cell to the diameter of the chicken pox virus?

A) 1.9x10^-2
B) 4.7x10^1
C) 4.7x10^2
D) 1.9x10^-3

ANSWER ASAP PLS

Answer 1

Answer:

Correct Choice: B) 4.7x10^1

Step-by-step explanation:

Scientific Notation

The diameter of a red blood cell is about 0.0008 cm. Expressing in scientific notation, the diameter is $8\cdot 10^{-4} \ cm$.

The diameter of a chickenpox virus is about $1.7\cdot 10^{-5}\ cm$. It's already expressed in scientific notation.

The ratio of both measures is:

$\displaystyle \frac{8\cdot 10^{-4} \ cm}{1.7\cdot 10^{-5}\ cm}$

Dividing the coefficients and subtracting the exponents:

$\displaystyle 4.7\cdot 10^{1}$

Correct Choice: B) 4.7x10^1