Which of the following is not equivalent to the formula d = rt?

d over r= t
r = dt
d over t= r
d over rt= 1

r = dt

To determine which option is not equivalent to the formula d = rt, we can evaluate each option and see if it holds true.

1. d/r = t: This option is equivalent to the formula since dividing both sides of the equation by r gives us d/r = rt/r = t.

2. r = dt: This option is equivalent to the formula since dividing both sides of the equation by t gives us r/t = dt/t = d.

3. d/t = r: This option is also equivalent to the formula since dividing both sides of the equation by t gives us d/t = rt/t = r.

4. d/rt = 1: To check whether this option is equivalent to the formula, we can multiply both sides by rt, which gives us d = rt. Therefore, this option is also equivalent to the formula.

Hence, all of the given options are equivalent to the formula d = rt.