I believe it is 1500
(1920 - 420)
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
Answer:
(a). 2.251 cm
, 2.349 cm, 2.295 cm
(b). 0.023 meters.
Step-by-step explanation:
(a). We are asked to to choose the options that shows the actual measurement of the rainfall.
Since the rounded figure is 2.3 cm, this means that either the tenths digit is 3 with hundredths digit less than 5, or tenths digit is 2 with hundredths digit greater than or equal to 5.
Let us check our given choices one by one.
Therefore, the correct choices are 2.251 cm
, 2.349 cm and 2.295 cm.
(b) We know that 1 cm equals 0.01 meters.
To convert 2.3 cm to meters, we will multiply 2.3 by 0.01.
Therefore, the rounded measurement of rain would be 0.023 meters.
Answer:
units
Step-by-step explanation:
Use the Pythagorean Theorem to find the diagonal:
You have that the sides are 3 and 6, so a = 3 and b = 6, which means:
This is the symbol for a segment bisector in geometry
Hope this helps!! :)