HEY CAN SOMEONE PLEASE HELP ME WITH THIS I'LL GIVE YOU 25 POINTS!

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

What point is the projection of q on a) r b) s c) t