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ale4655 [162]
3 years ago
9

The equation x3 + 3x2 + 5x + 15 = 0 has real and imaginary solution(s).

Mathematics
1 answer:
kumpel [21]3 years ago
5 0
1 real, 2 imaginary
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The mean per capita consumption of milk per year is 140 liters with a standard deviation of 22 liters. If a sample of 233 people
salantis [7]

Answer: 0.0192

Step-by-step explanation:

Given : The mean per capita consumption of milk per year : \mu=140\text{ liters}

Standard deviation : \sigma=22\text{ liters}

Sample size : n=233

Let \overline{x} be the sample mean.

The formula for z-score in a normal distribution :

z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

For  \overline{x}=137.01

z=\dfrac{137.01-140}{\dfrac{22}{\sqrt{233}}}\approx-2.07

The P-value = P(\overline{x}

Hence, the probability that the sample mean would be less than 137.01 liters is 0.0192 .

4 0
4 years ago
Spencer was 40 inches tall as a 4-year old which placed him in the top 10% of all children of similar age. the mean height for s
Umnica [9.8K]

The 90th percentile is 1.2816 standard deviations from the mean. That tells you the standard deviation is ...

... (40 in - 38 in)/(1.2816) ≈ 1.56 in

The standard deviation for height for 4-year olds seems to be 1.56 inches.

4 0
4 years ago
Find the differences between the values and the mean. then square each difference 39 42 45 47 52
Karolina [17]
The correct answer is 45
8 0
4 years ago
Please help me out!!!
BigorU [14]

the answer is G

Step-by-step explanation:

G is the answer

8 0
3 years ago
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The sears tower in Chicago is 1,450 feet tall. A model of the tower is 24 inches tall. What is the ratio of the height of the mo
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<span>Answer: c Explanation:- Given:- Actual height of tower is 1450. Model height of tower is 24. To find the ratio of height we divide it (24/1450) hence the answer is c 12:725</span>
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3 years ago
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