The function f(x) = 4.50x + 19 relates how much sean pays to his scout club, f(x), to the number of patches, x, he earns in a month. what is the value and meaning of f(12)? $73.00; this is the amount sean pays for earning 12 patches in a month. $73.00; this is the amount sean pays for 12 months of scout club. $85.50; this is the amount sean pays for earning 12 patches in a month. $85.50; this is the amount sean pays for 12 months of scout club.