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Svetllana [295]
2 years ago
15

The power g2 is equivalent to 81. What is the value of g-2?

Mathematics
2 answers:
Serggg [28]2 years ago
8 0

Answer:

7

Step-by-step explanation:

g^2 =81

so, g=9

g-2=9-2=7

dalvyx [7]2 years ago
3 0

Answer: 1/81

Step-by-step explanation:

just took the test

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An oil-well contractor drills a shaft 7 meters deeper into the ground every 2 hours. Which graph has a slope that best represent
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A student records the repair cost for 22 randomly selected dryers. A sample mean of $98.78 and standard deviation of $15.49 are
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Answer:

The critical value that should be used is T = 2.0796.

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Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

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95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0796, which is the critical value that should be used.

The margin of error is:

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The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.

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