Logically if you double weight on something it means that you are adding the exact same weight as the first object to the same thing to make it twice the weight as the original, so yes... the weight will double if the length is doubled

8 0

3 years ago

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Compute the mean and variance of the following probability distribution. (Round your answers to 2 decimal places.) x P(x) 7 0.10

Alex777 [14]

Answer:

14.2, 16.96

Step-by-step explanation:

given is a probability distribution of X

X is discrete taking values as 7, 11, 15 and 19

X 7 11 15 19 total

p 0.10 0.35 0.20 0.35 1

x*p 0.7 3.85 3.0 6.65 14.20

x^2*p 4.9 42.35 45 126.35 218 .60

Hence mean = sum of prob (x) = 14.20

$E(x^2) =218.60$

$Var(x) = E(x^2)-{E(x)}^2\\= 218.60-14.20^2\\= 16.96$

5 0

3 years ago

Malik buys and sells car parts. He bought two tires for $45.00 each and later sold them for $65.00 each. He bought three rims fo

satela [25.4K]

His profit =$71.00
Profit % = 52.6 % (to 1 decimal place)

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3 years ago

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