Answer and Explanation:
The journal entries are shown below:
On Aug 1
ShortÂ-term investments $70,000 Â
    To Cash $70,000
(Being the short term investment is recorded)
Here short term investment is debited as it increased the asset and credited the cash as it decreased the asset
On Oct 30
Cash ($70,000 × 11% × 90 days ÷ 360 days) 1,925 Â
    To Interest revenue $1,925
(Being the interest revenue is recorded)
here cash is debited as it increased the asset and credited the interest revenue as it also increased the revenue
Here we assume 360 days in a year