Answer:
Therefore, 13.9
Step-by-step explanation:
Given : Thirteen and nine tenths.
To find : Write in standard form .
Solution : We have given thirteen and nine tenths.
Thirteen = 13
Nine tenths = [tex]\frac{9}{10}[/tex].
13 + [tex]\frac{9}{10}[/tex].
13 + 0.9
13.9
Therefore, 13.9