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White raven [17]
3 years ago
11

Change 22 metres per second to a speed in kilometres per hour. Show your working clearly.

Mathematics
1 answer:
masha68 [24]3 years ago
7 0

Answer:

79.2 km/hour

Step-by-step explanation:

1 m/sec= 3.6 km/hour 22m/sec= ? so just multiply 22 m/sec by 3.6 km/hour then the answer will be :- 79.2 km/hour

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1. Find the 90% Cl for the population mean if sample
Elden [556K]

Answer:

The answer is below

Step-by-step explanation:

1)

mean (μ) = 12, SD(σ) = 2.3, sample size (n) = 65

Given that the confidence level (c) = 90% = 0.9

α = 1 - c = 0.1

α/2 = 0.05

The z score of α/2 is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.65

The margin of error (E) is given as:

E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.65*\frac{2.3}{\sqrt{65} } =0.47

The confidence interval = μ ± E = 12 ± 0.47 = (11.53, 12.47)

2)

mean (μ) = 23, SD(σ) = 12, sample size (n) = 45

Given that the confidence level (c) = 88% = 0.88

α = 1 - c = 0.12

α/2 = 0.06

The z score of α/2 is the same as the z score of 0.44 (0.5 - 0.06) which is equal to 1.56

The margin of error (E) is given as:

E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.56*\frac{12}{\sqrt{45} } =2.8

The confidence interval = μ ± E = 23 ± 2.8 = (22.2, 25.8)

8 0
3 years ago
Joe rolls a six-sided number cube and flips a coin. What is the probability that he rolls an odd number and flips a head on the
bogdanovich [222]

of the odd number it would be 3/6 in other words 1/2 Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Please helpp I would really appreciate it.
fiasKO [112]
I got 3/8, hope this helps.
5 0
3 years ago
A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees; and of 75
Natasha_Volkova [10]
For the answer to the question above asking about probabilities.
<span>the answer for a) would be 56/200 = 7/25
The answer for  
b) would be 75/200 = 3/8 and
lastly the answer for
c)34/200 = 17/100
</span>I hope my answer helped you. Feel free to ask more questions. Have a nice day!
6 0
3 years ago
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What is the greatest common factor of 24 and 84? A. 6 B. 12 C. 20 D. 24
sladkih [1.3K]

The greatest common factor for these two numbers is 6 because if you divide 24 by 6 you get 4 and if you divide 84 by 6 you get 14.

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3 years ago
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