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iogann1982 [59]
3 years ago
11

Pleasssssseeee help!​

Mathematics
2 answers:
Kryger [21]3 years ago
8 0

Answer:

<em>40 miles per hour. </em>

Step-by-step explanation:

\frac{1}{4} ÷ 22.5 = \frac{1}{4} × \frac{2}{45} = \frac{1}{90} mile per second

\frac{1}{90} × 3600 = <em>40 miles per hour.</em>

Ronch [10]3 years ago
7 0
A.

You have to convert 22.5 seconds to hours

1st you have to go from seconds -> minutes:
22.5 seconds x 1min / 60secs = 0.375mins

2nd go from minutes to hours:
0.375mins x 1hr / 60minutes = 0.00625hours

Since it is miles per hour, miles would go on top and hours (or seconds in this this case) would go on the bottom.

To find miles per hour:

(1/4) miles / 0.00625 hours = 40 miles per hour.

Therefore, hyena runs 40 miles per hour.
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Answer:

No, Owen wants to spend 105/100 of his money.

Step-by-step explanation:

HE wants to spend 2/10, 3/10, and 55/100 or 5.5/10, but if we add up all of the numbers we would get 10.5/10 meaning he would he 5  dollars short.

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-6y+y2+3-4y2-7+1-4y<br> Please help
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A population of monkeys' tail lengths is normally distributed with a mean of 25 cm with a standard deviation of 8 cm. I am prepa
Crank

Answer:

<em>The probability that the mean of my sample will be between 24 and 25 cm</em>

<em>P(24 ≤X⁻≤25) = 0.4772</em>

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

<em>Given mean of the Population  'μ'= 25c.m</em>

<em>Given standard deviation of the Population 'σ' = 8c.m</em>

<em>Given sample size 'n' = 256</em>

<em>Let X₁ = 24</em>

<em></em>Z_{1}  = \frac{x_{1}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{24-25}{\frac{8}{\sqrt{256} } } =  -2<em></em>

<em>Let X₂ = 25</em>

<em></em>Z_{2}  = \frac{x_{2}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{25-25}{\frac{8}{\sqrt{256} } } = 0<em></em>

<u><em>Step(ii)</em></u><em>:-</em>

<em>The probability that the mean of my sample will be between 24 and 25 cm</em>

<em>P(24 ≤X⁻≤25) = P(-2≤ Z ≤0)</em>

                     = P( Z≤0) - P(Z≤-2)

                     = 0.5 + A(0) - (0.5- A(-2))

                     = A(0) + A(2)        ( ∵A(-2) =A(2)

                     = 0.000+ 0.4772

                     = 0.4772

<u><em>Final answer</em></u>:-

<em>The probability that the mean of my sample will be between 24 and 25 cm</em>

<em>P(24 ≤X⁻≤25) = 0.4772</em>

                     

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the 4th one.

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