Question

A baby mouse weighs approximately 0.0022 pounds at birth. Write this weight in scientific notation

Answer 1

2 x 10^-4

Answer 2

^^^ not quite...
scientific notation is the product of a number between 1 and 10 (exclusive) multiplied by a power of 10: \(\large a \times 10^{n} \), where 1 <= a < 10, and n integer.

Answer 3

now im confused

Answer 4

Your original value is 0.0022 and it has 2 significant digits: "22". Converting it to scientific notation you would keep the two significant figures...but the first digit to the left of the decimal MUST be from 1 to 10.

So in this case, you could shift the decimal place 3 places to the right and get:
\[2.2x10^{-3}\]