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Juliette [100K]
2 years ago
14

In a group of hats consisting of only blue hats, green hats, and purple hats, the ratio of blue hats to green hats to purple hat

s is 7:4:12. If there are a total of 92 hats in this group, how many of these hats are not blue
Mathematics
1 answer:
elena-s [515]2 years ago
8 0

Answer:64 hats

Step-by-step explanation:

Ratio of Blue hats= 7

Ratio of Green hats= 4

Ratio of purple hats= 12

Total ratio = 7+4+12 = 23

Total hats= 92 hats

To get number of hats.that are not blue, we add the ratio of green and purple together= 4+12= 16

Number of hats that are not blue will be:

16/23 × 92

= 16 × 4

= 64

64 hats are not blue.

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Answer:

99.85%

Step-by-step explanation:

The lifespans of meerkats in a particular zoo are normally distributed. The average meerkat lives 10.4 years; the standard deviation is 1.9 years.

Use the empirical rule (68-95-99.7%) to estimate the probability of a meerkat living less than 16.1 years.

Solution:

The empirical rule states that for a normal distribution most of the data fall within three standard deviations (σ) of the mean (µ). That is  68% of the data falls within the first standard deviation (µ ± σ), 95% falls within the first two standard deviations (µ ± 2σ), and 99.7%  falls within the first three standard deviations (µ ± 3σ).

Therefore:

68% falls within (10.4 ± 1.9). 68% falls within 8.5 years to 12.3 years

95% falls within (10.4 ± 2*1.9). 95% falls within 6.6 years to 14.2 years

99.7% falls within (10.4 ± 3*1.9). 68% falls within 4.7 years to 16.1 years

Probability of a meerkat living less than 16.1 years = 100% - (100% - 99.7%)/2 = 100% - 0.15% = 99.85%

7 0
1 year ago
Read 2 more answers
Suppose a1=12−12,a2=23−13,a3=34−14,a4=45−15,a5=56−16. a) Find an explicit formula for an: . b) Determine whether the sequence is
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I'm going to assume you meant to write fractions (because if a_n are all non-negative integers, the series would clearly diverge), so that

a_1=\dfrac12-\dfrac12

a_2=\dfrac23-\dfrac13

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and so on.

a. If the pattern continues as above, we would have the general term

a_n=\dfrac n{n+1}-\dfrac1{n+1}=\dfrac{n-1}{n+1}

b. Note that we can write a_n as

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4 0
2 years ago
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Answer:

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Step-by-step explanation:

For u = sin(v), the partial derivative of u with respect to xi is ...

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In this case, v=sn, and ∂sn/∂xi = i, so the derivatives of interest are ...

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Answer: The answer is going to be 7


Step-by-step explanation: So for this problem it is important to know what a median is. The median is essentially the center number when everything is written out. So you want to take your line plot and write out each number on the bottom as many times as a dot appears above it. For this problem that would look like 6, 6, 7, 7, 8, 9, 9. Since you have seven numbers the center would be the 4th one. In ascending order out of these numbers the 7 occurs fourth thus giving you your answer.


5 0
2 years ago
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