If this is on mymaths.co.uk then the answer to this question is: Integration. That is how to find the area under the curve.
An area under curve is the area under the curve of a plot of concentration of drug in blood plasma against time.
The area under the standard normal curve is 1.
The area under the normal curve is ALWAYS 1.
If the values of the function are all positive, then the integral IS the area under the curve.
There is no histogram below.However, the area under the curve for any histogram is the total frequency.
the standard normal curve 2