There are two questions here, the first screen shot I got the answer incorrect. The correct format is showing, please provide work as to why this is the correct answer.

Use substitution to find the indefinite integral. 4u -du Vu - 8 Describe the most appropriate substitution case and the values of u and du. Select the correct choice below and fill in the answer boxes within your choice. A. Substitute u for the quantity in the numerator. Let v = , so that dv = ( ) du. O B. Substitute u for the quantity in the denominator. Let v = , so that dv = ( ) du. C. Substitute u for the quantity under the root. Let v= u - 8 , so that dy = ( 1 ) du. Use the substitution to evaluate the integral. 4u 8 du = 3 (4 - 8) + 64(u - 8) + C VU - 8