Answer:
v=
Step-by-step explanation:
For this case we have the following equation:
a = v ^ 2 / r
From here, we must clear the value of speed.
We have then:
v ^ 2 = a * r
v = root (a * r)
the formula for the velocity is:
4
420 divided by 98 is 4.28571428571, therefore rounding would make the answer 4!