A tree outside Ellie’s building casts a 27.5 foot shadow. At the same time of day, Ellie casts a 5.5 foot shadow. If Ellie is 4 feet 9 inches tall, how tall is the tree?

i think it is 18

step-by-step explanation:

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like:

i think its a.

hope this