Please give the highest value

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?

In the diagram below,abc is congruent to dec what is the value of x