7) Evaluate the expression XY - 3 + x when x = 2 and y = 5.
A. 5
B. 9
C. 12
D. 24
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The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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