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Answer: <em>(i) The unit rate at which online jewelry sales have been increasing is 1.33 billion dollars per year. </em>
<em>(ii) The online jewelry sales in 2019 will be 191.7 billion dollars.</em>
Step-by-step explanation:
In 2003, sales were approximately 2 billion dollars and in 2010, they were approximately 14.8 billion dollars.
(i) If is the number of years after 2003 and
is the amount of sales....
then the equation will be: , where
is the initial amount and
is the growth rate.
for 2003, and for 2010,
So, the two points in form of (x, y) will be: and
Now plugging these two points int the above equation....
Thus, the online jewelry sales have been increasing at a rate of 1.33 billion dollars per year.
(ii) As we got and
, so the equation will be now:
<u>For the year 2019, the value of</u> will be: (2019-2003) = 16
So plugging into the above equation, we will get.....
<em>(Rounded to the nearest tenth)</em>
Thus, the online jewelry sales in 2019 will be 191.7 billion dollars.
Answer:
a) 0
b) 0.579 is the probability that chloride concentration is less than 105.
c) 0.32 is the probability that chloride concentration differs from the mean by more than 1 standard deviation.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 104
Standard Deviation, σ = 5
We are given that the distribution of blood chloride concentration is a bell shaped distribution that is a normal distribution.
Formula:
a) Since normal distribution s a continuous distribution, the probability for a particular value is zero. Therefore,
b) P(chloride concentration is less than 105)
Calculating the value from the standard normal table we have,
c) P(chloride concentration differs from the mean by more than 1 standard deviation)
Since it is a normal distribution, the Empirical rule shows that 68% falls within the first standard deviation, 95% within the first two standard deviations, and 99.7% within the first three standard deviations.
= 1 - P(chloride concentration within the mean by 1 standard deviation)
= 1 - 0.68 = 0.32