the human brain has on average 35 billion nerve cells and an average mass of 1400 grams. What is the mass of a single nerve cell in scientific notation

Question

i don't know it

Answer 1

35,000,000,000 = 3.5 * 10¹⁰ in scientific notation.

1400 = 1.4 * 10³ in scientific notation

 

This means we have:

(1.4 * 10³)/ (3.5 * 10¹⁰)

1.4 / 3.5 = 0.4

10³ /10¹⁰ = 10^-7

 

That leaves us with:

0.4 * 10^-7, but as we need a number in the ones slot, we need to shift the decimal and notation by one more:

4.0 * 10^-8 grams