Given y=32t2 +16t+64, what is D2/t [y]?
A.-64
B.-32
C.16
D.-64t+6**
assuming you meant:
y = 32t^2 + 16t + 64
and assuming that D2/t [y] stands for the second derivative
y' = 64t + 16
y'' = 64, which is a constant, so no matter what x you give me,
y'' = 64
none of your choices are correct, unless D2/t [y] represents something other than my interpretation.