Lasandra wants to center a towel bar on her door that is 29 inches wide. She determines that the distance from each end of the towel bar to the end of the door is 7.75 inches. Write and solve an equation to find the length of the towel bar Which of the following equations represents the situation. Let r represent the length of the towel bar.

A. 1/2(7.75-r) = 29
B. 1/2(29-r)= 7.75
C. 1/2(7.75+r)= 29
D. 1/2(29+r)=7.75