math question please help

Question

Evaluate the Riemann sum for f(x)=x^3 , 0 ≤ x ≤ 4 with 8 subintervals using mid points.

Thank you

Answer 1

Δx = (4-0)/8 = 0.5 = length of each subinterval

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0 0.5 1 1.5 2 2.5 3 3.5 4

f(x) = x³

Riemann Sum: (0.25)³(0.5) + (0.75)³(0.5) + (1.25)³(0.5) + ... + (3.75)³(0.5)