3 years ago

The united states is one of the few countries that does not fully use the metric system for measurement. true false

Mathematics

1 answer:

maksim [4K]3 years ago

5 0

True and I guess it wants a longer answer so I'll say "true" again

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Rafael counted a total of 40 white cars and yellow cars there are nine times as many white cars as yellow cars how many white ca

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The answer probably 16 I don't really know

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2 years ago

According to a certain website, wine critics generally use a wine-scoring scale to communicate their opinions on the relative qu

const2013 [10]

Answer:

$\bar x = 82$

$\sigma = 9.64$

Step-by-step explanation:

Given

$n = 12$

$87\ 91\ 86\ 82\ 72\ 91\ 60\ 77\ 80\ 79\ 83\ 96$

Solving (a); Point estimate of mean

To do this, we simply calculate the sample mean

$\bar x = \frac{\sum x}{n}$

$\bar x = \frac{87+ 91+ 86+ 82+72+91+60+77+80+79+83+96}{12}$

$\bar x = \frac{984}{12}$

$\bar x = 82$

Solving (b); Point estimate of standard deviation

To do this, we simply calculate the sample standard deviation

$\sigma = \sqrt{\frac{\sum(x-\bar x)^2}{n - 1}$

$\sigma = \sqrt\frac{(87-82)^2+ (91-82)^2+ ....+ (79-82)^2+ (83-82)^2+ (96-82)^2}{12-1}$

$\sigma = \sqrt\frac{1022}{11}$

$\sigma = \sqrt{92.91}$

$\sigma = 9.64$

Note that: The sample mean and the sample standard deviation are the best point estimators for the mean and the standard deviation, respectively.

Hence, the need to solve for sample mean and sample standard deviation

3 0

3 years ago

Mrs katz is buying apples and carrot cake for a school party.the apples cost $2.12 per pound.the carrot costs $19.75 estimate th

Salsk061 [2.6K]

a rough estimate is 26 because 20+2(3)=26

3 pounds of apples are 6.36

19.75+ 2.12(3) = 26.11

5 0

2 years ago

Pls help me find the operations of 3a^2+4a^2+7a^2

Ber [7]

Answer:

14a^2

Step-by-step explanation:

3a^2+4a^2+7a^2

Combine like terms

Factor out a^2

a^2(3+4+7)

a^2(14)

14a^2

7 0

3 years ago

Read 2 more answers

Solve for x in the equation x2 -8x+41=0. X=-4+ 37i X = -4 - 5i X = 4+ 37i

Digiron [165]

Answer:

not sure if this is a right answer. but hope this helps

Step-by-step explanation:

5 0

2 years ago