Find a 4 digit odd number using each of the digit 1,2,3,4 and 5 only once such than when the first and the last digit are in interchanged it is divisible by 4

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation 0b is the intensity of a given sound and lo is the threshold of hearing intensity. what is the intensity, in decibels, [l(db)], when 1 - 10"(%)? use a calculator. round to the nearest whole number a. 15. b. 32 c. 320 d. 737