Determine image distance and image height

[Knfoster]

Homework Statement

A) Determine the image distance and image height for a 5-cm tall object placed 10 cm in front of a concave mirror having a focal length of 15 cm.

B) Determine the image distance and image height for a 5-cm tall object placed 45 cm in front of a concave mirror having a focal length of 15 cm.

Homework Equations

IDK

The Attempt at a Solution

Could someone please tell me what equation I should use? Thanks.

 

[mgb_phys]

Draw a diagram, you need to know what answer you expect