w = number of weeks
b(w) = number of books read after w weeks
====================================
b(w) = 12 translates to "after w weeks, Katy will have read 12 books" or put another way "Katy will have read 12 books after w weeks". The 'w' is a placeholder for some number
====================================
b(2) = 10 means "Katy has read 10 books after 2 weeks". We use the same basic idea talked about above, but we replace w with 2. At the same time, we use 10 instead of 12.
====================================
b(3) = f means "Katy has read f books after 3 weeks" or "after 3 weeks, Katy has read f books". Like w, the f is a placeholder for some number.
764.6 mg = 0.7646 g
1 pound = 454 g
X Pound = 0.7646 g
X = 0.7646 / 454
X = 1.68 * 10^-3
X = 0.00168 pounds
So the answer is (1.68*10^-3) pounds
A = 0.75
To figure out how much each banana was, subtract the cost of the apple.
4.35 - 0.75 = 3.60.
Divide 360 by 8.
3.60/8 = .45
Each banana costed $0.45
I hope this helps!