Physical, you aren't changing the substance, you are just changing the shape of the cookie
Answer:
2×10¹² cells → 90 g
mass of 1 red blood cell : 90÷(2×10¹²) = 45×10^-12 g = 4.5×10^-11 g
Equal, greater than, less than in that order
15 because one tie goes to each t shirt and 5-1 is 5 then you do it two more time’s because there are three shirts
