So we just have to evaluate these functions at three. So let's see, r, actually I can do it right over here. So let me make a little line here. So r of three is equal to, well let me get my calculator out, this is going to be, oops, not that calculator, let me get this calculator out. So, and I'm assuming that things are in radians here, so I already put my calculator in radian mode. So it's going to be 20 times sine of, whoops, 20 times sine of three squared is nine, divided by 35, and it gives us, this is equal to five point, approximately 5.09. This is approximately 5.09, and d of three, d of three is going to be approximately, so calculator back out, so it is, we have negative 0.04 times, times three to the third power, so times 27, plus, plus 0.4 times nine, times nine t squared, plus, plus 0.0, oh no, it's just 0.96, nine six times t, times three.