Simple interest formula:
[tex]I=P\times r\times t[/tex]I is the interest
P is the principal amount
r is the rate of interest in decimal form
t is the time in years
For the given situation:
P=10,000
r= (10/100)=0.1
t=3
[tex]\begin{gathered} I=10,000\times0.1\times3 \\ \\ I=3,000 \end{gathered}[/tex]