Find the measures a side of the square whose area is 400 square meters

20

Step-by-step explanation:

you know a square has sides that measure the same, so what two numbers when multiplied together get 40020

or the square root of 400 = 20

20m

Remember to put the unit !!! :)

Step-by-step explanation:

The formula to find the area of a square is s^2 or s x s

In this case, a number times the same number is 400

20 x 20 = 400 so the side is 20m

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58