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Y_Kistochka [10]
3 years ago
15

EASY MATH PLEASE HELP! a^2 + a + a^2

Mathematics
2 answers:
Arada [10]3 years ago
6 0

a^2 evaluates to  

a^2+a evaluates to  

Multiply the exponent of a by 2giving

The answer is

a^2 evaluates to  

 + =

The answer is

a^2+a+a^2 evaluates to


Setler79 [48]3 years ago
5 0

Answer:

a^2+a+a^2 evaluates to

Step-by-step explanation:

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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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3 years ago
Plssss help
mash [69]

Answer:I dont know but i think it is 1/2

Step-by-step explanation:

hope this helps

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Answer:

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