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3 years ago

I have two coins totaling 15 cents. One of them is it a nickel. What are they?

Mathematics

1 answer:

Aloiza [94]3 years ago

5 0

One is a nickel and the other is a dime

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The cost of a week long vacation in a city has a mean of 1000 and a variance of 1200. The city imposes a tax which will raise al

matrenka [14]

Answer:

The coefficient of variation after the tax is imposed is 0.033

Step-by-step explanation:

Given

$\mu =1000$ --- mean

$\sigma^2 = 1200$ --- variance

$tax = 10\%$

Required

The coefficient of variation

The coefficient of variation is calculated using:

$CV = \frac{\sqrt{\sigma^2}}{\mu}$

After the tax, the new mean is:

$\mu_{new} = \mu * (1 + tax)$

$\mu_{new} = 1000 * (1 + 10\%)$

$\mu_{new} = 1100$

And the new variance is:

$\sigma^2_{new} = \sigma^2 * (1 + tax)$

$\sigma^2_{new} = 1200 * (1 + 10\%)$

$\sigma^2_{new} = 1320$

So, we have:

$CV = \frac{\sqrt{\sigma^2}}{\mu}$

$CV = \frac{\sqrt{1320}}{1100}$

$CV = \frac{36.33}{1100}$

$CV = 0.033$

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3 years ago

Martas school has 325 desks for 13 classrooms . If the desks are shared evenly how many desks will each classroom have

Shtirlitz [24]

Answer:

Step-by-step explanation:

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2 years ago

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Please help me surface area!!

torisob [31]

Answer:

888

Step-by-step explanation:

SA=2xLxW+2xLxH+2xWxH

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3 years ago

Pls I need the answer for 3 and 4 and it’s very hard

Elodia [21]

#4 is 47, 48, 49

47+48+49=144

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3 years ago

Solve the equation for y (Y-3)^2=4y-12

Jet001 [13]

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3 years ago