Since \(4\times 4=16\), the square root of \(16\) is \(4\).
\[a-70.2\times 4=-1.96\]
Simplify \(70.2\times 4\) to \(280.8\).
\[a-280.8=-1.96\]
Add \(280.8\) to both sides.
\[a=-1.96+280.8\]
Simplify \(-1.96+280.8\) to \(278.84\).
\[a=278.84\]
a=278.84
