Solve asap ! solve for s. 4 + ) + s) = 20

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

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?

Can someone me with these two circle theorem questions asap?