How do you write thirteen and four tenths in standard form?

We need to convert to a decimal first.

'Thirteen' is just thirteen whole, so that is 13.

'Four tenths' is 0.4 as a decimal, so that is 0.4

Thirteen AND four tenths means we add them together.

So as a decimal = 13.4

Standard form must be between 1 and 10.

So we divide 13.4 by ten, giving us 1.34.

BUT, we have divided by ten, so the previous 13.4 x 10^0 now has to have the ten increase by a power, so our answer is 1.34 x 10^1.

Ans = 1.34 x 10^1

(x^0 = 1, where x is a positive whole number)