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For how answer my question this will be the last question can you answer in math subject

Find the area of a parallelogram with base 15 yards and height 21 2/3

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