Can somebody me answer this question?

What is the solution to the equation 9^(x+1) =27

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.

Asphere has a diameter of 10 in. what is the volume of the sphere?