Answer:
0.783
Step-by-step explanation:
To find first r and then r square for the data
correlation coefficient of x and y = Cov (x,y)/std dev x * std dev Y
Cov (x,y) = E(xy) -E(x)E(y)
Hence calculations would be as follows:
x y xy
1 2 2
2 10 20
5 5 25
7 18 126
10 25 250
Mean 5 12 84.6
Cov E(xy)-E(x)E(y) 24.6
r 0.884640297
r^2 0.782588454
so answre is 0.783 after rounding off.
Answer:
51ft^2
Step-by-step explanation:
Given data
Side of square patio= 9ft
Area= 9*9= 81 ft^2
New length = 9+3= 12ft
New Widht = 9+2= 11ft
New Area= 12*11
New Area= 132ft^2
Hence the area added is
=132-81
=51ft^2
I believe the correct answer is: B. But I’m not sure.
Answer:
6:5:2
Step-by-step explanation:
We need the amounts for v to be equal, so
u:v = 12:10 v is 10
v:w = 25:17 v is 25
Multiply the first ratio by 2.5 to get an equivalent amount for v
u:v = 30:25
so u:v:w = 30:25:10
They can all be divided by 5
6:5:2
