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son4ous [18]
2 years ago
5

Hedllloopp mee and u get brainlist!!!

Mathematics
2 answers:
RSB [31]2 years ago
7 0

Answer:

15

Step-by-step explanation:

9^2 + 12^2 = C^2

81 + 144 = C^2

225 = C^2

15 = C

Hope this helps! Pls give brainliest!

nikitadnepr [17]2 years ago
6 0

Answer:

15 cm (make sure to not put value with answer (cm))

Step-by-step explanation:

9x9 = 81

12x12 = 144

81+144 = 225

\sqrt{225} = 15

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Answer:

a. The sample size is approximately 97 adults

Step-by-step explanation:

The given parameters are;

The number of adults surveyed, n = 174

The lowest value of the pulse rate = 39 bpm

The highest value of the pulse rate = 111 bpm

The level of confidence used for determining the sample size = 90%

The given sample mean = 3 pm of the population mean

a. The range rule of thumb states that the standard deviation is approximately one quarter (1/4) of the range

The range = 111 bpm - 39 bpm = 72 bpm

Therefore, the standard deviation, σ = 72 bpm/4 = 18 bpm

The sample size, 'N', is given as follows;

N = \dfrac{z^2 \cdot p \cdot q}{e^2}

Where;

N = The sample size

z = The confidence level, 90% (z-score at 90% = 1.645)

p·q = σ² = 18² = 324

e² = 3² = 9

N = \dfrac{1.645^2  \times 324}{3^2} = 97.4169

Therefore the appropriate sample size, N ≈ 97 adults.

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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