Answer:
D
Explanation:
Okay basiacally what this one wants you to figure out if the exspression expressed are correct with the sighs that are given( greater than or less than sighs) and if its ordered from greatest to least. So you want to make sure to look at everyone carefully.
A is incorrect
B is very close but when you look at 4.15 and the square root of 21 we need to determine which one i greater. square rot of 21 is 4.58... so square root of 21 is greater than 4.15 so therefore it is incorrect.
so D is your answer