Question

how do you write 1.21 in scientific notation?
× 10

Explanation:

Step1: Recall scientific - notation form

Scientific notation is $a\times 10^{n}$, where $1\leqslant a<10$ and $n$ is an integer.

Step2: Identify $a$ and $n$ for 1.21

For the number 1.21, $a = 1.21$ and since we don't need to move the decimal point, $n = 0$.

Answer:

$1.21\times 10^{0}$