Answer:
20% mark up
Step-by-step explanation:
[(48-40)/40]×100%= 20%
Volume of water in the tank:

Differentiate both sides with respect to time <em>t</em> :

<em>V</em> changes at a rate of 2000 cc/min (cubic cm per minute); use this to solve for d<em>h</em>/d<em>t</em> :


(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)
Standard form: Ax + By = C
Equation: 12x + 15y = 120
Answer:
a)2975
b)3450
Step-by-step explanation: