Question $42$

$2$

At what speed would a clock have to be moving in order to run at a rate that is one$-$fourth the rate of a clock at rest?

$0\mathrm{.}87c$

$0\mathrm{.}75c$

$0\mathrm{.}97c$

$0\mathrm{.}50c$

$0\mathrm{.}26$ C