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What does the relationship between the mean and median reveal about the shape of the data

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days