PLZ HELP ON A TIME LIMIT A model of a house is created by putting a square pyramid on a cube. The resulting figure has a surface area of 165 square inches.

A square pyramid on top of a cube.

What is the height of one of the triangular faces?
2 inches
4 inches
5 inches
6 inches

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Math i have no idea how to do a and b