HW$11\mathrm{.}6$

$0/1$ point $($graded$)$

A sample contains radioactive atoms of two types, $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash ).$ Initially there are five times as many $\backslash ($ A $\backslash )$ atoms as there are $\backslash ($ B $\backslash )$ atoms. Two hours later, the number of the two atoms are equal. The half$-$life of $\backslash ($ A $\backslash )$ is $0\mathrm{.}88$ hours. What is the half$-$life of $\backslash ($ B $\backslash )$ in hours?

hours