Verified Answer :

luana

\(3.50\$\ for\ 4\ muffins\\\\ x\ for\ 12\ muffins\\\\ making \ proportion\\ 3.50-4\\ x-12\\\\cross\ multiplication\\\\ 3.50*12=4x\\\\ 42=4x\ \ \ | divide\ by\ 4\\\\ x=10.5\$\\\\ Dozen\ cost\ 10.5\$.\)

HolmesNWatson

1 dozen = 12
12/4= 3
Therefore, you need three lots of muffins at $3.50
$3.50*3= $10.50
Therefore, the price for a dozen muffins is $10.50
Hope this helps :)