How can you decompose 5/15 and 8/12 ?

If m 17 27 90 63 ** picture is attached

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

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