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Sveta_85 [38]
2 years ago
5

IM BEGGING YOU PLEASE HELP PLEASE HELP I NEED HELP PLEASE

Mathematics
1 answer:
I am Lyosha [343]2 years ago
8 0

Answer:

area of shaded region: 21.07 ft²

<u>Given for semi circle:</u>

  • radius of semi-circle: 7 ft

<u>Given for rectangle:</u>

  • width: 7 ft
  • length: 14 ft

<u>Find area of rectangle:</u>

Length * Width

14 * 7

98 ft²

<u>Find the area of semi circle:</u>

1/2 * π * r²

1/2 * 3.14 * (7)²

76.93 ft²

<u>Area of shaded region:</u>

area of rectangle - area of semi-circle

98 ft² - 76.93 ft²

21.07 ft²

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The pulse rates of 174 randomly selected adult males vary from a low of 39 bpm to a high of 111 bpm. Find the minimum sample siz
Daniel [21]

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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2 years ago
What value of n makes the equation true?
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2/3 n = -12 Write equation

(3/2) 2/3n = -12/1 (3/2) Isolate n

n = -36/2 Simplify

n = -18 Answer




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Step-by-step explanation:

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The ANGLE BISECTOR mentioned in the problem is simply just a line that separates an angle in half.

Meaning if it bisects ∠SUT which is 34. It just means that it divides the angle 34 into 2 equal parts.

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Therefore the measurement of ∠1 is 17°.

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Answer:

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