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lozanna [386]
3 years ago
12

En

Mathematics
2 answers:
grin007 [14]3 years ago
7 0

Answer:

Step-by-step explanation:

a

Hunter-Best [27]3 years ago
5 0

Answer:

he has a 80% to roll a 2 on the dise

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The data set of the diameters of the metal cylinders manufactured an automatic machine has sample size of n=29, mean of x= 49.98
Lena [83]

Answer:

we say for  μ = 50.00 mm we be 95% confident that machine calibrated properly with ( 49.926757  ,  50.033243 )

Step-by-step explanation:

Given data

n=29

mean of x = 49.98 mm

S = 0.14 mm

μ = 50.00 mm

Cl = 95%

to find out

Can we be 95% confident that machine calibrated properly

solution

we know from t table

t at 95% and n -1 = 29-1 = 28 is  2.048

so now

Now for  95% CI for mean is

(x - 2.048 × S/√n  ,  x + 2.048 × S/√n )

(49.98 - 2.048 × 0.14/√29  ,  49.98 + 2.048 × 0.14/√29 )

( 49.926757  ,  50.033243 )

hence we say for  μ = 50.00 mm we be 95% confident that machine calibrated properly with ( 49.926757  ,  50.033243 )

8 0
3 years ago
School taxes for a local district are 2.5% of a household's income. The Smith household earns $80,000 per year. How much do the
Alex
Since 2.5% as a decimal is .025, the equation to get this is:

(.025)(80000)

Once multiplied, these equal 2,000. Or in other words, the Smiths pay $2,000 in school taxes per year.
5 0
3 years ago
Write 0.54 as a fraction.
valina [46]

The answer is fifty four hundredths

6 0
3 years ago
Read 2 more answers
Any cookie jar 1/4 of the cookies or chocolate chip and 2/3 of the rest are peanut butter what fraction of all the cookies peanu
CaHeK987 [17]

Answer:

3/12

Step-by-step explanation:

5 0
3 years ago
A bank account yields 7 percent interest, compounded annually. If you deposit $1,000 in the account, what will the account balan
lianna [129]
Hi there
The formula is
A=p (1+r)^t
A future value?
P present value 1000
R interest rate 0.07
T time 5 years
So
A=1,000×(1+0.07)^(5)
A=1,402.55

It's a

Hope it helps
7 0
3 years ago
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