Answer:
220 ways
Step-by-step explanation:
The order matters because there's going to be a first, second, and third place.
So, 12P3=12!/(12-3)!*3!=12!/9!*3!=12*11*10*9!/9!*3!=12*11*10/6=220
Therefore, 220 ways
2632*1340*-155*45*9198*14663*0*650*1310*18090
=0
This data set gives the height (in feet) of 15 rose plants in a garden: 5, 3, 4, 3, 2, 4, 1, 5, 5, 1, 1, 5, 4, 3, 5.
JulijaS [17]
Answer: It’s plot C
That’s because if you count how many fives there are then that’s how many dots same with four there two and one.
Answer:
45
Step-by-step explanation:
105+30 = 135
180-135= 45
:')
Answer:
3600 hours
Step-by-step explanation:
let total life time of t four transistors T = X1 + X2 + X3 + X4 (where X1,X2,X3 and X4 are life time of individual transistors
mean of the length of time that four transistors will last =E(T)=E(X1 + X2 + X3 + X4)
=E(x1) + E(x2) + E(x3) + E(x4) =900+900+900+900 =3600
and standard deviation of total time =SD(T)=sqrt(Var(T)) = sqrt(Var(X1) + Var(x2) + Var(x3) + Var(x4))
where sqrt means the square root
=sqrt(302+302+302+302) =sqrt(3600) =60