One of the main reasons you have to show work for math is because your teacher needs to know that you understand the concept. Also, showing work helps your teacher know that you didn't cheat using an online calculator that just gives you an answer.
It would be 4,1 squared units so it would be D.
1 is expressed in decimal simply as 1.00
23/100 is expressed in decimal by 0.23
1 is a whole number and for it to become a decimal we must convert it into a fraction and perform division. 1 in fraction form is simply 1/1 which equals to 1.
23/100 to become decimal we need to divide 23 by 100. It will give us a quotient of 0.23
