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sheilaaguilar2014
21.03.2021 •
Mathematics
37% of visitors to a museum make
voluntary donations. On a certain day the
museum has 175 visitors. What is the
probability that at least 50 visitors make a
donation? What is the probability that
between 55 and 65 (inclusive) visitors will
make a donation?
Solved
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Ответ:
a)
,
, b)
,
, c)
,
. The rate at which the area within the circle is increasing linearly inasmuch as time passes by.
Step-by-step explanation:
The area of a circle is described by the following formula:
Where:
Since circular ripple is travelling outward at constant speed, radius can be described by the following equation of motion:
Where:
The rate of change of the circle is determined by deriving the equation of area and replacing radius with the function in terms of the speed of the circular ripple and time. That is to say:
Where:
If
, then:
a)![t = 1\,s](/tpl/images/0693/1907/2dd3e.png)
b)![t = 3\,s](/tpl/images/0693/1907/8d178.png)
c)![t = 5\,s](/tpl/images/0693/1907/58087.png)
The rate at which the area within the circle is increasing linearly inasmuch as time passes by.