What is y when x = 40?

A). about 92
B). about 98
C). about 155
D). about 170

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?

How do i do this activity, is appreciated

Average acceleration: i have no idea how to do this.