Since the scale is 1:83, the real airplane is 83 times longer than the model airplane.
real length = 10.5 in * 83 = 871.5 in
Now we convert 871.5 in into ft.
1 ft = 12 in, so 1 in = 1/12 ft
We divide the number of inches by 12 to find the number of feet.
871.5 in = 871.5/12 ft = 72.625 ft
The answer is B
Product means to multiply
The parallelogram<span>, rectangle, and </span>square<span> all have two pairs of parallel sides </span>
I'm guessing you intended to say has mean and standard deviation , and has means and standard deviation .
If , then has mean
and variance
Given that and , we have
Then
and are independent, so , and
so that the variance, and hence standard deviation, are
# # #
Alternatively, if you've already learned about the variance of linear combinations of random variables, that is
then the variance of is simply the sum of the variances of and , , and so the standard deviation is again .
Answer:
80
Step-by-step explanation:
64s : Xg
4s.Xg = 5g.64s
X = (5g*64s)/4sg
= 5*64/4
= 5*16
= 80