Answer:
Inequality: 15<_x<_21
How many scarves she should knit each day: 3
If she knits two, she will not get 15 scarves. If she does 3, she does not get past her 21 limit.
Answer:
original price = $129
20% discounted price = $103.2
adding 7% sales tax = $110.424
OPTION B = 110.42
2.2 x 10 to the 5th power.