Caden answered 80% of the questions on her science test correctly. If she answered 20 questions correctly, how many questions were on the test?

A : 27
B : 26
C : 28
D : 25

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2