Step-by-step explanation:
<h3>#1)</h3>As per the question, when the flow rate is negative, oil is moving into the small tank.
The large tank started with 600 gallons of oil. The recorded flow rate was - 4 gallons/ min.
That is, In one minute, 4 gallons of oil is moving from the large tank to the small tank.
Therefore, after 32 mins <u>1</u><u>2</u><u>8</u><u> </u><u>gals</u><u> </u><u>of</u><u> </u><u>oil</u><u> </u><u>has</u><u> </u><u>flown</u><u> </u><u>into</u><u> </u><u>the</u><u> </u><u>small</u><u> </u><u>tank</u><u>.</u>
<h3 /><h3> #2)</h3>After 32 mins, the large tank lost 128 gallons of oil.
The remaining oil in the large tank = 600 - 128
=<u> 472 gallons </u>