Answer:
D
Step-by-step explanation:
Since 2 variables are inter-dependent (there is correlation between them given as 0.64), we need to use the formula shown below:
Var(x+y) = Var(x) + Var(y) + 2 * correlation coefficient * *
<em><u>Given Var(m) = 1600, Var(n) = 900 and correlation coefficient 0.64, we plug them into the formula and solve:</u></em>
Var (m+n) = Var(m) + Var(n) + 2 * correlation coefficient * *
= 1600 + 900 + 2(0.64)*Sqrt(1600)*Sqrt(900)
= 4036
correct answer d
Answer:
152 m²
Step-by-step explanation:
<u>Area of flower garden</u>
Assuming the flower garden is <u>rectangular</u> and its dimensions are measured in <u>meters</u>:
- width of garden = 14 m
- length of garden = 20 m
<u>Total area of path and garden</u>
If there is a 2 m wide path <u>all around the garden</u>, the dimensions of the total area will be the dimensions of the garden extended by 4 m:
- width = 14 m + 2 m + 2 m = 18 m
- length = 20 m + 2 m + 2 m = 24 m
<u>Area of path</u>
To calculate the <u>area of the path</u>, subtract the <u>area of the garden</u> from the <u>total area</u>:
Answer:
Step-by-step explanation:
cos(-150)
rate my answer please
If it’s either nonincreasing or nonincressing