Nine and twelve thousandth decimal form

Which math sentence can be used to determine if the triangle is a right triangle?

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

Acircle has a circumference of 7.850 units. what is its radius?