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Naddik [55]
3 years ago
14

Which number is itra

Mathematics
2 answers:
True [87]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Its irrational

notka56 [123]3 years ago
4 0

Answer:

b

Step-by-step explanation:

a = 8/5 ∈ Q

c = 12 ∈ N

d = 1/2 ∈ Q

b ∈ I

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An airplane took 5 hours to travel 3,420 kilometers.how many kilometers did the plane travel in one hour
tino4ka555 [31]

Answer:

684 Hours.

Step-by-step explanation:

If the plane travelled that distance in 5 hours, then all you need to do is divide the distance by 5 to get the distance travelled in one hour. This is obviously presuming that the speed travelled was constant or that this is an average figure.

3420/5 = 684.

8 0
3 years ago
Read 2 more answers
An arithmetic
Sunny_sXe [5.5K]

Answer:

an = 7.5 - 5.5(n - 1).

Step-by-step explanation:

The common difference d = -5.5.

The first term is given as 7.5.

Explicit formula is

an = a1 + (n - 1)d

= 7.5 + (n - 1)-5.5

= 7.5 - 5.5(n - 1)

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2 years ago
In a pair of complementary angles, the measurement of the larger angle is three times that of the smaller angle. Find the measur
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Step-by-step explanation:

idkjsjdjdjdjdjdjdjdjdjdjdjdjjfdjjr

8 0
3 years ago
- Brady deposited $600 into a new com
NikAS [45]

Answer:

Brady will have earned $75 in interest.

Step-by-step explanation:

The interest formula is i = p*r*t, where p is the principal amount, r is the interest rate as a decimal fraction, and t is the number of years.

Here, i = $600(0.025)(5 yr) = $75.

Brady will have earned $75 in interest.

8 0
3 years ago
A manager records the repair cost for 14 randomly selected dryers. A sample mean of $88.34 and standard deviation of $19.22 are
s2008m [1.1K]

Answer:

Hence the 90% confidence interval estimate of the population mean is (79.24 , 97.44)

Step-by-step explanation:

Given that,  

Point estimate = sample mean = \bar x = 88.34  

sample standard deviation = s = 19.22  

sample size = n = 14  

Degrees of freedom = df = n - 1 = 13  

Critical value =t\alpha /2, df = 1.771

 

Margin of error

E = t\alpha/2,df \times (\frac{s}{\sqrt{n} } )\\= 1.771 \times (19.22 / \sqrt 14)  

Margin of error = E = 9.10  

The 90% confidence interval estimate of the population mean is,  

\bar x - E < \mu < \bar x + E\\\\88.34 - 9.10 < \mu < 88.34 + 9.10\\\\79.24 < \mu < 97.44\\(79.24 , 97.44)

8 0
2 years ago
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