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
-6 [4-(x-2)]
Distribute.
-6-4x+2
-4x-4
Answer:
(9/10 mile)/(5/3 hour) = 27/50 miles/hour
Step-by-step explanation:
If you are looking for the speed, then speed = distance/time
speed = (9/10 mile)/(5/3 hour)
speed = 9/10 ÷ 5/3 miles/hour
speed = 9/10 × 3/5 miles/hour
speed = 27/50 miles/hour
Exact Form:
b = 3/2
Decimal Form:
b = 1.5
Mixed Number Form:
b = 1 1/2
Hope This Helps You!
Please mark as brainlest if possible!
Angle a,b,c equals 222; because angle a and b already is 180; so there is a right angle in the top with a 48 degree next to it so add then up and its 138; now subtract 180 which is the total of the total angels with 138 and you get 42; now add that to 180 and you get your answer which is 222.