The ultraviolet spectrum of 4-nitroaniline shows a primary absorption band at 225 nm and a secondary band at 375 nm. If a solution of 4-nitroaniline in ethanol, with a concentration of 15.4 mg/ml,is examined at a wavelength of 375 nm, the absorbance is determined to be 1.75. The cell length is 1 cm. What is the molar absorptivity of this absorption band?