Answer:
(a) $7785
(b) $7897.5
Step-by-step explanation:
Given:
Loan = $7500
We need to find the balance of the loan be after one year(assuming the student has not made any payments yet).
The formula for amount or loan is
.... (1)
where, P is principle, r is rate of interest and t is time in years.
(a) If bank charges 3.8% interest each year.
r = 3.8% = 0.038
Substitute P=7500, r=0.038 and t=1 in equation (1).

Therefore, the balance of the loan be after one year is $7785.
(b) If the bank charger 5.3% interest each year.
r = 5.3% = 0.053
Substitute P=7500, r=0.053 and t=1 in equation (1).

Therefore, the balance of the loan be after one year is $7897.5.