OA is B -The figure shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution in each of the six regions shown. For a population of 800,000 subway riders, the numbers of subway trips taken per rider last January are approximately normally distributed with a mean of 56 trips and a standard deviation of 13 trips. Approximately how many of the riders took between 30 and 43 trips last January?
Answer:
An introduced species is not necessarily harmful to the environment; an invasive species has a negative effect.
Explanation:
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Metals are found in group 1, 2, and abit of 3.
Non-metals are found in group 0/8, abit in 4, 5, 6 and 7 too. Here is a picture. Most of the periodic table are metals.
The answer is the last one d
The approximate length of the diameter,d of the circle is 250 ft
<h3>How to find the diameter of a circle</h3>
Circumference of the circle = 250π
- Circumference of a circle = 2πr
250π = 2πr
250π / 2π = r
125 = r
Recall,
Radius, r of a circle = Diameter, d ÷ 2
125 = d/2
d = 125 × 2
d = 250
Therefore, the diameter of the circle is 250 ft
Learn more about circumference of a circle:
brainly.com/question/15673093
