I will mark you as brainliest if you help me with this one 8 and 9

8 b. K moves into the cell by passive transport.

9. D. K movement out of the cell requires ATP hydrolysis.

Explanation:

Passive transport is a type of transport in which molecules moves from a region of lower concentration to the region of higher concentration through a semipermeable of the cell without the use of energy. So potassium moves into the cell without the use of energy but its movement outside the cell requires energy in the form of Adenine tri phosphate (ATP).

If we subtract the atomic number from the weight, we get the number of neutrons in the particle. This is because protons and neutrons each have a weight of 1, while electrons are 0. And since the atomic number is also the number of protons in the atom, subtracting it from total weight gives us the number iif neutrons.