For a continuous random variable XXX with PDF f(x)=38x2f(x) = \frac{3}{8}x^2f(x)=83x2 for 0≤x≤20 \leq x \leq 20≤x≤2, what is E[X]E[X]E[X]?
1.0
1.5
0.75
2.0