book Maths Puzzle Numerical Ability

solve the inequality graph the solution

-4/5r<8

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book Other Question

let V1, V2, V3, and V4 be a basis of a four-dimensional vector space V.
i) Is it true that V1, V2, and V3 span a three-dimensional subspace of V? If so describe that space.
ii) If 4^(1/5) = x, then

a. x * x * x * x * x = 4
b. 1/(x * x * x * x * x) = 4
c. 4 * 4 * 4 * 4 * 4 = x
d. 1/(4 * 4 * 4 * 4 * 4) = x