A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month: x=0.8x+72 How many people who became members of the site that month were between 30 and 40 years of age? (1 point) a. 112 b. 288 Xc. 360 d. 432