How much intrest at 2.30 percent on 9600 hundred dollars over 14 years

assuming interest accrues annually you have

$$FV=PV(1+rate)^T$$

$$FV=9600(1.023)^{14}$$

$${\mathtt{9\,600}}{\mathtt{\,\times\,}}{\left({\mathtt{1.023}}\right)}^{{\mathtt{14}}} = {\mathtt{13\,198.668\: \!008\: \!406\: \!117\: \!257\: \!2}}$$

so you would end up with $13,198.67 after 14 yrs.

Rom has assumed compound interest , compounding yearly at 2.3% per annum

BUT really these are just very sensible assumptions on his part.

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It depends on whether it is compound interest or simple interest.

and

is it 2.3% per annum or per some other time period.

and

If it is compound interest, how often is it compounding.