What is the measure of angel a rounded to nearest whole number ? a. 30 degrees b. 28 degrees c. 2 degrees d. 62 degrees

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days