Question

Which one is this answer if you are good a math

Answer 1

`a=(2d)/(t^2)\ \ \ \ \ |\text{solve for t} \\ \\\\(2d)/(t^2)=(a)/(1)\ \ \ \ \ |\text{cross multiply}\\\\at^2=2d\ \ \ \ \ |:a\\\\t^2=(2d)/(a)\to t=\sqrt{(2d)/(a)}\\\\\text{We have}\\ \\a=2(m)/(s^2),\ d=10m\\\\\text{substitute}\\\\t=\sqrt{(2\cdot10m)/(2(m)/(s^2))}=\sqrt{10m\cdot(s^2)/(m)}=√(10s^2)=√(10)\ s\\\\Answer:\ C.\ √(10)\ seconds`