Taylor drives 280 miles to see his grandma. He drives from 9:30 am until 1:45 pm. At this rate, how far would he drive in a day? Approximate rate and round to the nearest mile. 

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