Kinda need help with 2 questions there short questions. Anyone.help

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Write the equation in logarithmic form m^x=n

The graph of y=x3 is transformed as shown in the graph below. which equation represents the transformed function?