Answer :
Answer: $1,890
Step-by-step explanation:
It is important understand the type problem here. Since it is a interest problem, we need figure out which interest it is and the correct formula.
The question asks a simple interest and the formula is [tex]I = Prt[/tex]
"I" is is the interest.
"P" is the principal amount.
"r" is the rate.
"t" is the time in years.
Afterwards, we plug in the values into formula. We want to find "[tex]I[/tex]."
"[tex]P[/tex]" would be the $9000. "[tex]r[/tex]" would be the 7%. "[tex]t[/tex]" woud be the time in years.
[tex]I = (9000)(0.07)(3)[/tex]
[tex]I = 1890[/tex]
Therefore, Thang will need to pay an interest of $1,890.