An object is 3.6 m from the pinhole. Its image is 4.2 cm from the opposite side of the pinhole. The height of the image is 0.8 cm. What is the height of the object?

Height of the object is 68.6 cm.

Step-by-step explanation:

The height of the object can be determined by:

=

From the given question;

object distance from pinhole = 3.6 m = 360 cm

image distance from pinhole = 4.2 cm

height of image = 0.8 cm

So that;

=

⇒ object height =

                           =

                           = 68.571

object height = 68.6 cm

Thus, the height of the object is 68.6 cm.

58 stamps is the number she gets each week. So if she went for one week, 58*1=58. 58*2=116 and so on. Because we don't know the exact number of weeks, we say 58w or 58*w because you multiply however many number of weeks she collects.