If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 mm in front of the lens what is the height of the image

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles