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Agata [3.3K]
3 years ago
15

For the past week, your restaurant revenue was $28,675 and your food cost was $9,274. Calculate your gråss margi

Mathematics
1 answer:
Len [333]3 years ago
3 0

Answer: b) 68%

Step-by-step explanation:

Gross margin is used to calculate the amount left of revenue after the costs of goods sold is accounted for.

The formula is:

= (Revenue - Cost) / Revenue

= (28,675 - 9,274) / 28,675

= 0.67658

= 68%

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A city is holding a referendum on increasing property taxes to pay for a new high school. In a survey of 434 likely voters, 202
EleoNora [17]

Answer: 0.418 < p < 0.512

Step-by-step explanation: A 95% conifdence interval for a population proportion is given by:

p + z\sqrt{\frac{p(1-p)}{n} }

where:

p is the proportion

z is score in z-table

n is sample size

The proportion for people who said "yes" is

p=\frac{202}{434} = 0.465

For a 95% confidence interval, z = 1.96.

Calculating

0.465 + 1.96*\sqrt{\frac{0.465(0.535)}{434} }

0.465 + 1.96*\sqrt{0.00057}

0.465 ± 1.96*0.024

0.465 ± 0.047

Interval is between:

0.465 - 0.047 = 0.418

0.465 + 0.047 = 0.512

<u>The interval with 95% of confidence is between 0.418 and 0.512.</u>

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3 years ago
Solve for x. 3x/x+4<br> + 1= 4/x+4
Westkost [7]

Answer: X = 1

Step-by-step explanation:

3 x  \frac{x}{x} + 4 + 1 = \frac{4}{x} + 4

First, you would want to cancel out the equal terms, in this case its the +4's

3 x  \frac{x}{x} + 1 = \frac{4}{x}

I would also change the \frac{x}{x} into a 1

3 x 1 +1 = \frac{4}{x}

Now multiply and add

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