A farmers has 7 3/4 rows of almonds in one field 4 3/4 rows of almonds in another field, and 6 1/4 in the third field. How many rows altogether?

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