Choose the correct equation for the graph shown below

Mathematics

1 answer:

Paraphin [41]3 years ago

6 0

Answer:

the second option, y=1/2cos(x- pi/4)

Step-by-step explanation:

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Solve each inequality and graph it’s solution

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Solve this system by substitution. <br> Y=-8x-23<br> Y=-5x-14

matrenka [14]

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Read 2 more answers

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

Standard deviation = s = 7.8 pounds

Sample size = n = 120

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

The t-value associated with 95% confidence interval and df=119 from the t-table comes out to be:

t = 1.98

The formula to calculate the confidence interval is:

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