the expression is 27a^3 or (3a)^3
Since Density = mass/ volume (d = m / v), and assuming the 15 fish weigh 1 gram each - if weight of each fish isn't given - (making that a total of 15 grams),
D = m / v
0.3 = 15 / v
v = 15 / 0.3 = 50 ft cubed
Hope this answers your question correctly :)
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<span>Just list all elements that belong both to A and to B
A ∩ B = {6,12}</span>
