The answer is 692.857143
Hope this helps! :)
You will need 29.22 cans of paint, but since you can't buy .22 cans, it would probably round to 30 cans
To get the variance, start with finding the mean of your data points:
(23 + 19 + 22 + 30 + 28) / 5 = 24.4
Now take each data point and subtract the mean from it, then square that value:
23 - 24.4 = -1.4 * -1.4 = 1.96
19 - 24.4 = -5.4 * -5.4 = 29.16
22 - 24.4 = -2.4 * -2.4 = 5.76
30 - 24.4 = 5.6 * 5.6 = 31.36
28 - 24.4 = 3.6 * 3.6 = 12.96
Now get the average of those new numbers. That is your variance:
(1.96 + 29.16 + 5.76 + 31.36 + 12.96) / 5 = 16.24
The standard deviation will be the square root of the variance:
√(16.24) = 4.0299 (rounded to 4DP)
Perimeter :
because there are four sides to a square and all sides are the same, the answer is 4(2x-9)
area:
area is basically length times width so the answer is (2x-9)(2x-9) or (2x-9)^2
Answer:
4√3 ft²
Step-by-step explanation:
Area of the garden = ½*b*h
b = 4ft
To find h, apply trigonometric function:
Reference angle = 60°
Opposite = h
Hypotenuse = 4 ft
Apply SOH:
Sin 60° = Opp/Hyp
Sin 60 = h/4
4*sin 60 = h
4*√3/2 = h (sin 60 = √3/2)
2*√3 = h
h = 2√3
Find the area:
Area = ½*b*h
= ½*4*2√3
= 4√3 ft²