Jenny is building a rectangular garden around a tree in her yard. the southwest corner of the garden will be 2 feet south and 3 feet west of the tree. the northwest corner of the garden is 1 foot north and 4 feet east of the tree. what will be the perimeter of jenny's garden ?
a. 10 ft
b. 20 ft
c. 21 ft
d. 25 ft

There are numerous important information's already given in the question. Based on those information's the answer can be easily determined. From the information's given, we get the coordinates as (-3, -2) and (4, 1). From these co ordinates, we can say that
Height of the rectangle is 3 feet
Length of the rectangle is 7 feet
Then
Perimeter of the rectangle = 2( length + Height)
                                          = 2(7 + 3)
                                          = 2 * 10    
                                          = 20 feet
From the above deduction, we can conclude that the correct option is option "B".

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.