Answer:
48 inch
Step-by-step explanation:
1)
LHS:

LHS = RHS. So, the statement is true
2)
LHS:

LHS not equal to RHS. So, the statement is false
3)
LHS:

LHS = RHS. So, the statement is true.
4)
LHS:

LHS = RHS. So, the statement is true.
$810 because if you use the simple interest formula (s=p*r*t), you get $810 hope this helped!