The function A(t)=10 (1)30 represents the mass A(1) , in grams, of a certain radioactive isotope remaining in a substance after t seconds. Which of Testi the following is the best interpretation of the value 10 in this context? A) The initial mass, in grams, of the radioactive isotope in the substance when t=0 B) The mass, in grams, of the radioactive isotope in the substance after 30 seconds C) The number of seconds it takes for the radioactive isotope in the substance to completely disappear D) The number of seconds it takes for half of the initial mass of radioactive isotope in the substance to disappear data set X+ 20 25 30 aily data set Y 20 25 30 Data set X and data set Y are displayed by the two dot plots shown. Which of the following is(are) the same for both data sets? 1.The mean 2.The median A) I only B) II only C) I and II D) Neither I nor II A function fhas the property that if point (a,b) is on the graph of the equation y=f(x) in the xy- plane, then the point (a+1, b) is also on the graph. Which of the following could define f? A) f(x)=1/(-1/2)* b=a 3 B) f(x)=12()** 3 b = atl b=b+1 C) f(x)=12(3)* D) F(x) = (12)* b=3btl 26=1