Your answer would be the last option, c = √(E/m).
We can see this when we rearrange the equation, as:
E = mc²
÷ m
E/m = c²
√
√(E/m) = c
So you got all the steps in rearranging correct :)
I hope this helps!
The shape shown here is a triangular pyramid, because it has a triangular base and a pointy tip.
40 bikes. 120 times 40 equals 4800 divided by 2 because they pay for half the bike will be 2400
