Answer: 78.5 ft
Step-by-step explanation: 25 times 3.14
9514 1404 393
Answer:
63
Step-by-step explanation:
Reversing the digits changes the value by a factor of 9 times the difference in the digit values. Here, this means the digits differ by 27/9 = 3. If one digit is double the other, the higher digit is 2×3 = 6.
The number is 63.
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If you like, you can work through the algebra of it. Let the original number have tens digit x and ones digit y.
original number value = 10x +y
reversed number value = 10y +x
difference of values = 27 = (10x +y) -(10y +x) = 9(x -y)
The tens digit is twice the ones digit, so we have ...
x = 2y
Substituting in the difference equation, we have ...
27 = 9(x -y)
3 = (2y -y) = y . . . . . divide by 9, substitute for x
x = 2(3) = 6
The number is 10x+y = 63.
Answer is 1 and 3. You’re welcome.
Based on the one-sample t-test that Mark is using, the two true statements are:
- c.)The value for the degrees of freedom for Mark's sample population is five.
- d.)The t-distribution that Mark uses has thicker tails than a standard normal distribution.
<h3>What are the degrees of freedom?</h3><h3 />
The number of subjects in the data given by Mark is 6 subjects.
The degrees of freedom can be found as:
= n - 1
= 6 - 1
= 5
This is a low degrees of freedom and one characteristic of low degrees of freedom is that their tails are shorter and thicker when compared to standard normal distributions.
Options for this question are:
- a.)The t-distribution that Mark uses has thinner tails than a standard distribution.
- b.)Mark would use the population standard deviation to calculate a t-distribution.
- c.)The value for the degrees of freedom for Mark's sample population is five.
- d.)The t-distribution that Mark uses has thicker tails than a standard normal distribution.
- e.)The value for the degrees of freedom for Mark's sample population is six.
Find out more on the degrees of freedom at brainly.com/question/17305237
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