Answer: The amount of salt in the tank after 8 minutes is 36.52 pounds.
Step-by-step explanation:
Salt in the tank is modelled by the Principle of Mass Conservation, which states:
(Salt mass rate per unit time to the tank) - (Salt mass per unit time from the tank) = (Salt accumulation rate of the tank)
Flow is measured as the product of salt concentration and flow. A well stirred mixture means that salt concentrations within tank and in the output mass flow are the same. Inflow salt concentration remains constant. Hence:

By expanding the previous equation:

The tank capacity and capacity rate of change given in gallons and gallons per minute are, respectivelly:

Since there is no accumulation within the tank, expression is simplified to this:

By rearranging the expression, it is noticed the presence of a First-Order Non-Homogeneous Linear Ordinary Differential Equation:
, where
.

The solution of this equation is:

The salt concentration after 8 minutes is:

The instantaneous amount of salt in the tank is:
Answer:'
-9.7 minus, in 13
Step-by-step explanation:
Simple interest=prt
=688.88 (.0925)(1)
=63.72
Balance=investment + interest earned
=688.88+63.72=$752.60
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definition of "measurement" (noun) is the use of numbers, dimensions,
quantity, or capacity as ascertained by comparison with a standard. It
can also refer to the act of measuring, which is a verb.
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D. Hope that is the answer