Please tell fast plz

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Light waves can move through , but they travel fastest when they move through a(n) .

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.