Could you please help me!!

  A.  21.2 m

Step-by-step explanation:

The perimeter of a polygon is the sum of its side lengths. A square is a polygon with four sides, all the same length. You can add up the side lengths, or you can take advantage of multiplication to do the repeated addition.

  P = 4s

  P = 4(5.3 m) = 21.2 m

The distance Yani walked was 21.2 meters.

21.2 Meters

Step-by-step explanation:

The perimeter is 4n where n is the length of one side of a square.

1 side of the square patio is 5.3 meters.

4(5.3)=21.2

cosine

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,