Show work of a surface done with a 8.4 diameter and a 20.89 height

Which statement justifies why angle ebc measures 90?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Define multiplicative inverse. give an example of a number and its multiplicative inverse.