An animator uses red tiles to design a pattern that grows each second, as shown in this diagram. use the drop-down menus to build functions that describe how the pattern is changing.

s(t) gives the number of tiles in the inner square of the pattern at t seconds.

s(t)= _

a(t) gives the number of tiles added to the outside of the inner square of the pattern.

a(t)= _

p(t) gives the actual number of tiles in the pattern at t seconds.

p(t)=s(t) _ a(t)

p(t)= _