Maria has to spend 512 hours to finish her community service program in a community health clinic. Last week, she was able to spend 334 hours. Which equation can be used to determine the number of hours, h, that Maria still needs to spend to complete her service program?

h + 3 3/4 = 5 1/2

h − 5 1/2 = 3 3/4

h − 3 3/4 = 5 1/2

h + 5 1/2 = 3 3/4