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Viefleur [7K]
3 years ago
10

Determine the area of a circle

Mathematics
1 answer:
zubka84 [21]3 years ago
3 0
I don’t see any pictures
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You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Y
Luda [366]

Answer:

T = 4.541

Step-by-step explanation:

We don't have the standard deviation for the population, so we use the t-distribution.

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

df = 4 - 1 = 3

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 3 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 4.541

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3 years ago
It took the Selby family hours round -trip to drive from their house to their beach house 154 miles away . Find their average sp
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Step-by-step explanation:

Distance = 154 miles .

Time = 5 ½ hrs .

We know ,

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v = 154 mi/ 5.5 hrs = 28 mi / hr

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2 years ago
Stan makes $685 per week and Mark makes $41,250 per year. Who makes more?
Nataliya [291]

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Mark makes more money than Stan.

Step-by-step explanation:

There are about 52 weeks in a year. If you multiply $685 by 52, it will be $36,305.

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2 years ago
Solve by elimination <br> 5x-y=12 <br> 3x+2y=2
Ber [7]
(2)5x-y=12
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13x=2
x=0.15
7 0
2 years ago
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60 is 1/100 of what? ​
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2 years ago
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