The answer is c. 4 because it’s a subset of 8
2^n - 1 = 1/2(2^n)
2^1 - 1 = 2^1/2
2 - 1 = 2/2
1 = 1
Theefore, the set must have one element
Bryan has 180 feet of fencing. he use the wall for one side of fencing
So he has to fence only 3 sides
he has to fence bottom side + left side+ right side of the wall
Let x be the width of the garden
Let y be the length
Perimeter of the garden = length + width + width
180 = y +x +x
180 = y+2x
so y = 180 - 2x
(a) Area of rectangle = Length * width
Area = y * x
Area = (180 -2x)* x
so area of the garden = -2x^2 +180x
(b)To find dimension to create largest are we find x coordinate of the vertex
formula is 
a= -2 and b = +180

So width = 45
We know length y = 180 - 2x= 180 - 2(45) = 90
Dimension with greatest area is
Length = 90 feet
width = 45 feet
(c) Greatest area = length * width
= 90 * 45 = 4050 square feet
Answer:
what ????sorry I do t know what that says
Answer:
20 liters of the 40% solution
60-20=40 liters of the 70% solution
Step-by-step explanation:
40%x+70%(60-x)=60%(60)
0.4x+0.7(60-x)=0.6(60)
0.4x+42-0.7x=36
-0.3x+42=36
-0.3x=-42+36
-0.3x=-6
0.3x=6
3x=60
x=60/3
x=20 liters of the 40% solution
60-20=40 liters of the 70% solution
check: 0.4*20=8
0.7*40=28
8+28=36 and 0.6*60=36 also