Explanations needed as well

Calculus Name: Area between a curve and the x-axis 2 Date: Pd: Find the area between the curve and the x-axls on the given Interval. 1. f(x) = 3x + 2. [2.4] 2. f(x) = x' 3x 4, [1.4] 3. {(x) = x3 + 2x - a, [0.4] 4. f(x) = 4? 1. [0,9] f(x) = 3x2 - 4x 4-, [2.2] 6. f(x) = x3 + 12 6x, [3.2]