Astudent’s rectangular desk is 30 inches long and 18 inches wide. the teacher’s desk is similar to the student’s desk and has a length of 50 inches. what is the width of the teacher’s desk?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?