Me and my friends think my teacher think our teacher mispelled this problem because it makes no sense to us whatsoever.. here it is:

Use parametric equations to simulate motion:

S= -0.1(t^3 -20t^2 + 110t = 85) 0<(or equal to) t < (or equal to) 12

Gary walks along a horizontal line and those are the coordinates of his position...

to me, the = sign there makes absolutely no sense.. i think it could be a + but i still dont know how to solve it..