Answer:
(B) Mean 3 and standard deviation 5
Step-by-step explanation:
Property of mean
The mean of the sum or difference of two random variable R and S is the sum of their means.
μ (R-S) = μ(R) - μ(S)
μ(R-S) = 10 - 7 = 3
Property of standard deviation
The variance of Independent variable R and S is is the sum of their variances. Even when we subtract two random variables, we still add their variances; subtracting two variables increases the overall variability in the outcomes.
σ^2(R-S) = σ^2 (R) + σ^2(S)
= 16 + 9 ( variance = (standard deviation)^2 )
= 25
σ(R-S) = 5
Answer:
65000
Step-by-step explanation:
(rounding to nearest thousands)
2014- 13000 sold
2015- 13000 more than 2014, so 26000
2016- same as 2016, 26000
just add them up-
13000+26000+26000= 65000
Answer:
V=1384.74 cubic units
Step-by-step explanation:
1) Substitute the values into the volume formula for a cylinder which is
2) Using PEMDAS solve for V
3) First, you square 7 to get
4) Next, mulitply the three numbers together to get V.
2 1/4 you add them together and keep the fraction
2 is the answer to this equation