We first standardise

:
P(1224 >

)=P(

>

)
which reduces to finding P(Z > 1.2) = 0.115
Since it's on a 1:40 scale, you just multiply 4.4in by 40, to get 176in. That's the actual length.
Answer:
Variance of the given data = 31.143
Explanation:
Variance,
, where n is the number of observations, μ is the mean and
is the observations made.
Number of observations, n = 7
Mean, μ = 


So variance of the given data = 31.143
0.65 at year 0 (0, 0.65)
27.56 at year 30 (30, 27.56)
slope = (27.56 - 0.65) / (30 - 0)
slope = 26.91 / 30
Change = 0.897 or almost 90 cents
A.area hope u get a good grade