Suppose the radius of a circle is 3 units what is the circumference
1 answer:
Answer:
or approximately
units
Step-by-step explanation:
The formula for finding the circumference of a circle is , where
= circumference and
= radius. In this case,
, so after plugging that into
, we get:
Since is approximately
,
, which rounds to
. Therefore, the circumference of the circle is
, or approximately
units. Hope this helps!
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Answer:
The answer is
Step-by-step explanation:
If we assume that people cannot taste a difference between bottled water, then the probability of identifying tap water is 0.5
Thus, P(identify tap water)=0.5
The probability that at least 8 of the 9 people identify the tap water correctly is the sum of the probabilities
- 8 of 9 people identified correctly or
- 9 of 9 people identified correctly
Since P(identify tap water)=0.5 each probabilities are the same and equal to
=
So we have =
This is Pythagorean's Theorem, with one leg being 10 and the hypotenuse being 16. Using those values in the theorem looks like this:
and
and
so
Take the square root of both sides to find that b = 12.5
and
and
so
Take the square root of both sides to find that b = 12.5