Question 1128649
{{{ c^2 = a^2 + b^2 }}}
{{{ 7^2 = 4^2 + b^2 }}}
{{{ 49 = 16 + b^2 }}}
{{{ b^2 = 49 - 16 }}}
{{{ b^2 = 33 }}}
{{{ b = 5.7 }}} ( to the nearest 10th )