First one is C second one is D. In the first one, the line is between 0 and 240 and in the second one brackets mean a closed point while parentheses mean an open point
In order to solve this you first need to take $20 subtracted from 160 that leaves you with 140 next because she bought 4 sweaters you need to divide your remaining cash spent by 4 to get a total of $35 a sweater.
Six hundred and thirty six millionths