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

Correct Choice: B) 4.7x10^1

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 (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