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2 years ago

What is the area of a circle whose radius is 5 ft? 57 ft2 107 fta 207 ft? 257 ft

Mathematics

2 answers:

marysya [2.9K]2 years ago

6 0

The area of a circle is pie times radius squared so... 3.14 * 5^2 = 78.5 and that is not an answer choice so idk.

rewona [7]2 years ago

3 0

Answer:

Step-by-step explanation:

π $* 5^{2}$ = 3.14 * 25 = 78.5

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Answer:

$P(A')=1-0.411=0.589$

And that represent the probability that they take longer than 7 minutes to solve the puzzles.

Step-by-step explanation:

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: $P(A)+P(A') =1$

On this case we have that n= 56 represent the employees selected to solve the puzzles.

We know that 23 out of the 56 selected solved the puzzles in less than 7 minutes.

Let's define the events A and A' like this:

A: Employees solved puzzles in less than 7 minutes

By the complement rule then:

A' : Employees solved puzzles in more than 7 minutes

Based on this we are interested to find the probability for A'

We can begin finding P(A), from the definition of probability we know:

$P(A)=\frac{Possible outcomes}{Total outcomes}$

For this case if we replace we got:

$P(A) =\frac{23}{56}=0.411$

And using the complemnt rule we got:

$0.411 +P(A')=1$

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And that represent the probability that they take longer than 7 minutes to solve the puzzles.

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2 years ago