Help me please I’m so confused

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

What is always true about a positive integer raised to a negative odd power?

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte