When using scientific notation, you only want one number to be in front of the decimal place. If you have to make the number smaller, then the 10^nth power will be positive. If you have to make the number bigger, then 10^nth power will be negative. Example: 0.54 --> 5.4 * 10^-1 35 --> 3.5 * 10^1 The value of n depends on how many spaces the decimal point needs to be moved. For your question, putting 23 in scientific notation would look like this: 23 --> 2.3 * 10^1
The area is found by multiplying length times width. So, since you already have one of the sides of the room, you just divide the area by by that side. 132.9 ÷ 10.9 = 12.2
