Jason is saving up for a skateboard and helmet. The skateboard is $45.50 with tax and the helmet is $18.25 with tax. He earned 1/3
of the money by mowing lawns and the rest by babysitting. How much did Jason earn babysitting?
A.
$19.13
B.
$21.25
C.
$30.33
D.
$42.50
Let's call the amount Jason earned by babysitting x. Since he earned 1/3 of the money by mowing lawns, he earned 1 - 1/3 = 2/3 of the money by babysitting.
If the skateboard cost $45.50, then Jason earned 2/3 * $45.50 = $<<2/3*45.50=30.33>>30.33 by babysitting. Answer: \boxed{\text{(C)}\ $30.33}.