You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. how would you enter this number into the answer box?
enter your answer in kilograms using three significant figures. note that the units are provided for you to the right of the answer box.

The mass of an electron, me, 9.11 × 10⁻³¹ kilograms shows there are 3 important numbers in them, namely numbers 9, 1, and 1

Significant numbers are obtained from measurement results of exact numbers and the last number estimated

This is called significant numbers

the scientific notation can be described as:

a, ... x 10ⁿ

a, ... called a significant number

10ⁿ is called a big order

Rules for significant numbers in general:

From the numbers known in the question amounting to 9.11 × 10⁻³¹ kilograms shows there are 3 important numbers in them,(symbol a, before a big order ,called a significant number) namely numbers 9, 1, and 1

significant figures

link

significant figures in the following number: 5.67 x 106

link

the number of significant figures is 0.025

link

0.080 significant figures

link

the fewest number of significant figures

link

Keywords : significant number, the scientific notation, decimal point, a big order

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.