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soldier1979 [14.2K]
3 years ago
14

The cost of a long distance call is $1.25 for the

Mathematics
2 answers:
Vinil7 [7]3 years ago
8 0
C

For first 3 minutes keep 1.25
Then for rest do 0.15(x-3)
Now add to get total cost



Mark brainliest please
Inga [223]3 years ago
6 0
The answer is C because it’s 1.25 for the first 3 minutes and then you subtract those three minutes from your total call time and multiply that by .15
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Two companies manufacture a rubber material intended for use in an automotive application. The part will be subjected to abrasiv
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Step-by-step explanation:

Due to the time it took to solve this question, I had little time to type the answers fully

The answers are contained fully in the attachment I have uploaded.

A. H0: u1 = u2

H1: u1 not equal to u2

The t statistics was solved to be 3.03

The degree of freedom was solved to be 26

Given this information, this is a 3 tailed test, critical value at 5% = +-2.056

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We therefore reject the null hypothesis at 5% and conclude they have different mean wear

The p value is calculated using excel and the result is 0.00544

We reject null at 5% since p value is less than 0.05

B. H0: u1 = u2

H1: u1>u2

Alpha = 0.05

Following a,

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Df = 26

Critical value for 1 tailed test = 1.706

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We reject H0 and conclude company 1 has higher mean wear.

We find p value for a right tailed distribution using excel

Tdist(3.03,26,1)

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C. Confidence interval

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3 years ago
Please help!.......
larisa86 [58]
(f+g) means add the expressions together. combine like terms.
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Answer:

13 is x= 100 degrees

Step-by-step explanation:

7 0
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Answer:

Step-by-step explanation:

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Answer:

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Thats the answer

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