Guys ANYONEEE PLSSSI NEED HELP LIKE ACTUALLY

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22