6. [-/1 Points] DETAILS Evaluate the definite integral. 3x / 2 8 | sin(x) | dx Jo Need Help? Read It 7. [-/1 Points] DETAILS If w'(t) is the rate of growth of a child in pounds per year, what does w'(t) dt represent? The child's weight at age 7. The child's weight at age 10. The change in the child's age (in years) between the ages of 7 and 10. The change in the child's weight (in pounds) between the ages of 7 and 10. The child's initial weight at birth