#1. The area of a square tile is 53.4cm^2. find the length of one side of the tile, rounded to the nearest 10th. #2 which RADICAL is not a perfect square
a)5.29
b)13.69
c)1.3
d)0.09

#3 A walkway is been constructed using square cement tiles that each have an area of 15.5ft^2. Six tiles will be lined up end to end to construct a walkway. What is the total length of the walkway? Round your answer to the nearest 10th of a foot.

PLEASE ANSWER ASAP
all of them or even one would help please please

Problem 1

Explanation: Apply the square root to the area to get the side length. This only applies to areas that are squares (hence the name).

Problem 2

Explanation: Use your calculator to find that choices A,B,D plugged into the square root function yield terminating decimal values. "Terminating" means "stop". This implies that they are perfect squares (though not perfect squares in the sense of whole number perfect squares which you may be used to). Choice C is the only value that has a square root that leads to a non-terminating decimal. The digits of this decimal go on forever without any pattern. The value is irrational.

Problem 3

Explanation: Apply the square root to 15.5 to get roughly 3.937; this is the approximate side length of one square. Six of these tiles placed together will lead to a total length of roughly 6*3.937 = 23.622 which rounds to 23.6 feet. Like with problem 1, the square root being used like this only works for square areas.