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goblinko [34]
4 years ago
15

Is the sum of 0.0675 rational or irrational?

Mathematics
1 answer:
8090 [49]4 years ago
6 0

The answer is irrational

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Please Help!!!
Leni [432]
<h2>Answer : (2.67, 3.53)</h2><h2></h2>

Step to step explanation:

Confidence interval for mean, when population standard deviation is unknown:

\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}

, where \overline{x} = sample mean

n= sample size

s= sample standard deviation

t_{\alpha/2} = Critical t-value for n-1 degrees of freedom

We assume the family size is normal distributed.

Given, n= 31 , \overline{x}=3.1, s= 1.42 ,

\alpha=1-0.9=0.10

Critical t value for \alpha/2=0.05 and degree of 30 freedom

t_{\alpha/2} = 1.697  [By t-table]

The required confidence interval:

3.1\pm ( 1.697)\dfrac{1.42}{\sqrt{31}}\\\\=3.1\pm0.4328\\\\=(3.1-0.4328,\ 3.1+0.4328)=(2.6672,\ 3.5328)\approx(2.67,\ 3.53)

Hence,  the 90% confidence interval for the estimate = (2.67, 3.53)

6 0
3 years ago
Daisy has 1/8 tank of gas remaining when she pulls into a gas station. After she puts 15 gallons of gas in her car, the gas gaug
OLga [1]

Answer:

  24

Step-by-step explanation:

Let t represent the volume of the tank in gallons. Then we have ...

  (1/8)t + 15 = (3/4)t . . . . . . . . . . . adding 15 gallons fills the tank to 3/4

  15 = (6/8 -1/8)t = (5/8)t . . . . . . . subtract 1/8t

  15(8/5) = (8/5)(5/8)t . . . . . . . . . multiply by 8/5 (the inverse of 5/8)

  24 = t

The tank holds 24 gallons.

5 0
3 years ago
Sandra calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it?
gregori [183]
Triangle D
Because the Pythagorean Theorem is only used with a RIGHT triangle
3 0
2 years ago
What is the answer to this ​
Gnesinka [82]
I’m pretty sure it’s c if not then a
4 0
4 years ago
Work out the value of (1.7X10^4) X (8.5X10^-2) in standard form
kvv77 [185]
answer is 1.445 x 10^3
5 0
3 years ago
Read 2 more answers
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