Answer:
1) the journal entry to record the sale:
Dr Accounts receivable 200,000
Cr Sales revenue 192,000
Cr Interest revenue 8,000
Generally a six month note would be recorded at face value since it is a current asset, but since the company considers it to have a significant financing component, we must record sales revenue and interest revenue separately.
2) the effective interest rate on a simple interest loan = interest / principal = $8,000 / $192,000 = 4.17% semiannual or 8.33% annual effective interest rate