2 years ago

The diameter of a US penny is 3/4 inch. How many pennies would it take to make a row of 42 inches long?

Mathematics

1 answer:

Anon25 [30]2 years ago

7 0

For the penny question the answer is 56

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In designing a true/false test you use a random number generator to determine if the answer is true or false. This gives you a r

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no because

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the results were not tested enough

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3 years ago

5. A rectangle measures 10 feet by 6 feet. The length and width are each

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Answer:

135ft^2

Explanation

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1 year ago

Sheila buys two concert tickets from her friend she pays $90 for the two tickets she looks at the tickets and sees that each tic

Maru [420]

Cost of two tickets that Sheila paid to her friend = $ 90

Actual price of 1 ticket = $ 52.50

So, actual price of 2 tickets = $52.50\times2=105$

Hence, markdown or discount Sheila's friend gave her is =

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2 years ago

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One variable examined is the survival rate 10 years after tagging. The scientists observed that 10 of the 50 metal tagged pengui

Oksana_A [137]

Answer: 90% confidence interval would be $(-0.2483,-0.0717)$

Step-by-step explanation:

Since we have given that

n₁ = 50

Number of metal tagged penguins survived = 10

So, $p_m=\dfrac{10}{50}=0.2$

n₂ = 50

Number of electronic tagged penguins = 18

So, $p_e=\dfrac{18}{50}=0.36$

So, at 90% confidence interval, z = 1.28

So, interval would be

$(p_m-p_e)\pm z\sqrt{\dfrac{p_m(1-p_m)}{n}+\dfrac{p_e(1-p_e)}{n}}\\\\=(0.2-0.36)\pm 1.28\sqrt{\dfrac{0.2\times 0.8}{50}+\dfrac{0.36\times 0.64}{50}}\\\\=-0.16\pm 0.0883\\\\=(-0.16-0.0883,-0.16+0.0883)\\\\=(-0.2483,-0.0717)$

Hence, 90% confidence interval would be

$(-0.2483,-0.0717)$

6 0

3 years ago

(2²)(3²)<br><br> someone please help

Vaselesa [24]

4x9=36your answer is 36

Reason:2squared is 2x2 =4

Reason:3squared is 3x3=9

When you square a number you are multiplying it by itself

3 0

3 years ago