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3 years ago

An item that was selling 72 is reduced to 60. Find the recent decrease in price. Round you answer to the nearest tenth.

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

8 0

You need to find what percentage the difference is of 72.

First, subtract 60 from 72:

72-60=8

Next, divide 8 by 72:

8/72=0.1111

To convert this decimal to a percentage, multiply it by 100:

100*0.1111=11.11

The percent decrease is 11.11%.

Hope this helps!!

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olya-2409 [2.1K]

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kvv77 [185]

Answer:

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3 years ago

A random sample of 12 recent college graduates reported an average starting salary of $54,000 with a standard deviation of $6,00

Marianna [84]

Answer: a.) $50188 to $57812

Step-by-step explanation: Confidence Interval (CI) is an interval of values in which we are confident the true mean is in.

The interval is calculated as

x ± $z\frac{s}{\sqrt{n} }$

a. For a 95% CI, z-value is 1.96.

Solving:

54,000 ± $1.96.\frac{6000}{\sqrt{12} }$

54,000 ± $1.96\frac{6000}{3.464}$

54,000 ± 1.96*1732.102

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This means the interval is

50605 < μ < 57395

With a 95% confidence interval, the mean starting salary of college graduates is between 50605 and 57395 or from 50188 to 57812$.

b. The mean starting salary for college students in 2017 is $50,516, which is in the confidence interval. Therefore, since we 95% sure the real mean is between 50188 and 57812, there was no significant change since 2017.

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3 years ago

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Answer:

Step-by-step explanation:

a=bh x 1/2

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a= 3 x 8 x 1/2

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Hope this helps :)

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7nadin3 [17]

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3 years ago

Read 2 more answers