How do you write 3.9 × 101 in standard form?

Answer 1

To write $3.9\times {10}^1$ in standard form, you need to perform the multiplication.

Calculating $3.9\times {10}^1$:

1. ${10}^1=10$
2. Multiply $3.9$ by $10$:

$$3.9\times 10=39$$

So, the standard form of $3.9\times {10}^1$ is $39$.