An hourglass composed of 2 identical cones is 12cm tall. Each has a radius of 3cm. What is the approximate surface area of the hourglass?

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

If square root x = -7, then x= -49 true or false

Ineed to know the answer to this algebra question.