Answer:
its 400
Step-by-step explanation:
Answer:
-5; -40; -640
Step-by-step explanation:
Answer:
500 meters =20men =10days
To get the factor 500/(20*10)= 5/2 meters/day
For 50 men and 5days we don't know the meters
So we go by 50*(5/2)*5 =625meters
Answer:
1
Step-by-step explanation:
Equation of variance:
Total Variance = sum (i=1, N) {c^2,variance^2}
= c1^2*variance1^2 + c2^2*variance2^2 + .....
Variance of X = 1
Variance of Y = 5
Variance of Y - 2X = (1^2)*(5) - (2^2)**(1)
= 5 - 4 = 1
