8th Grade Algebra
posted by Anonymous on .
To find the image length, of a 4foottall object in a spherical mirror with a focal length of 2 feet, L=4(2/o2)^2 can be used, where 2 is the distance, in feet, of the object from the mirror. What is the image length of the object when it is 1.5 feet away from the mirror?

Repeated question with correct information in the question:
To find the image length, of a 4foottall object in a spherical mirror with a focal length of 2 feet, L=4(2/o2)^2 can be used, where o is the distance, in feet, of the object from the mirror. What is the image length of the object when it is 1.5 feet away from the mirror? 
L = 4 (2/1.5 2)^2
=4 (2/3 2)^2
= 4 (2/3)^2 = 4* 4/9 = 16/9