10k^4+10k^3+8k^2+8k+10/k+1 not sure if this is what you are looking for or not hope it helps
I think u will need to add 5ml acid into the solution to get 25% acid
X=6
16 plus 2 is 18 and divided by 3 is 6
I cannot see a pictureesss
(7.2 × 10^7) ÷ (9 × 10^4)
= (7.2 / 9) x 10^(7 - 4)
= 0.8 x 10^3
= 8 x 10^2
Answer
C. 8 × 10^2