I got 30, I’m not sure if it’s correct or not.
Answer:
1.5
Step-by-step explanation:
The mean is the Middle number.
1 standard deviation in both sides of 7.5 makes it between 6 and 9.
<u>What is the </u><u>"common difference"</u><u> in 6 to 7.5 and from 7.5 to 9?</u>

and

So, we would say the standard deviation is 1.5
Answer choice A is right.
Answer:

Step-by-step explanation:
Note : <u><em>the total number of students is 55</em></u>
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p(A) = 40/55
p(B) = 15/55

Therefore,




The area covered by the plant increases by 16.66% every month.
Step-by-step explanation:
Step 1; It is given that the plant's area triples every year. So if the plants' area is 100 square feet at the beginning of a year it will be 300 square feet at the end of the year. So there will be an increase of 200% in a year.
Step 2; So to find the increase per month we divide the 200% increase per year by 12 so that it becomes a monthly increase.
Monthly increase =
% = 16.66%. So the tropical plant's area increases by 16.66% each month.
Answer: No, she cannot
Step-by-step explanation:
this is because 194 divided by 6 = 32.333333333, which is an uneven number. hope this helps!