800 * ( 6.45 / 100 ) = 8 * 6.45 = 51.6$ ;
The given equation is:
(8+3a) * a
To get the value at a=1/3, we will substitute the value of a in the given equation with 1/3 and compute the result as follows:
(8+3(1/3)) * (1/3)
(8+1)*(1/3)
(9) * (1/3) = 3
You would get 1.98 back
explanation: 50-48.02=1.98