Answer:
0.75 times 
Step-by-step explanation:
The computation of the acid test ratio is shown below:
 Quick ratio = Quick assets ÷ total current liabilities 
where, 
Quick assets = Account receivable + cash balance
= $30,000 + $15,000
= $45,000
And, the current liabilities is $60,000
Now put these values to the above formula 
So, the value would equal to 
= $45,000 ÷ $60,000
= 0.75 times