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Svetach [21]
3 years ago
9

Find the absolute value of the complex number –4.0 – 7.0i. 8.06 8.16 8.6 8.61

Mathematics
1 answer:
FromTheMoon [43]3 years ago
5 0

Answer:

A) 8.06

Step-by-step explanation:

Edge21

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11-float

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A charity bingo game costs $2 per round and has a $13 entry fee for an adult. It costs $3 per round and a $10 entry fee for a ch
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For this case we have to:

x: Be the variable that represents the number of adult rounds

y: Be the variable that represents the number of rounds of children

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Child costs = 3y + 10

Matching:

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3

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4 years ago
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3 years ago
The mayor is interested in finding a 95% confidence interval for the mean number of pounds of trash per person per week that is
baherus [9]

Answer:

(30.09, 32.91)

Step-by-step explanation:

Mean number of pounds of trash = x = 31.5 pounds

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Confidence level = 95%

Since, we are given the sample standard deviation instead of the population standard deviation, we will use t-test to find the confidence interval.

Degrees of freedom = df = n - 1 = 120 - 1 = 119

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t = 1.98

The formula to calculate the confidence interval is:

(x-t\frac{s}{\sqrt{n}}, x+t\frac{s}{\sqrt{n}})\\

Using the values in above expression we get:

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Thus, the 95% confidence interval for the mean number of lbs of trash per person per week that is generated in the city is (30.09, 32.91)

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3 years ago
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