Answer:
Interest = $268.49
Maturity value = $7268.49
Step-by-step explanation:
In this case, we know
Principle = $7000
rate = 5% = 0.05
Time = 280 days
Since we need the time in years, we need to convert 280 days to years as

Then, we can calculate the interest as
Interest = Principle x rate x time
Interest = $7000 x 0.05 x 0.77
Interest = $268.49
Now, the maturity value is
Maturity value = Principal + Interest
Maturity value = $7000 + $268.49
Maturity value = $7268.49
Therefore, the answer is
Interest = $268.49
Maturity value = $7268.49