1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lana66690 [7]
3 years ago
11

Please help me find the answe asap

Mathematics
1 answer:
Andreyy893 years ago
4 0

Answer:

B

Step-by-step explanation:

the mean is calculated as

mean = \frac{sum}{count}

this year's mean = \frac{7+3.3+2}{3} = \frac{12.3}{3} = 4.1

last year's mean = \frac{5.3+1.6+2.4}{3} = \frac{9.3}{3} = 3.1

difference = 4.1 - 3.1 = 1

You might be interested in
Is (10^4 + 10^3 + 10^2) divisible by 37?
cupoosta [38]
Yes it can be divided 300 times
5 0
2 years ago
Find the difference, radicals plz help:(
earnstyle [38]

Answer:

-2 radical 5 the second one

7 0
3 years ago
The area of a pizza is 616 square centimeters.
Thepotemich [5.8K]
Well A= \pi r^2
616= \pi r^2
\frac{616}{\pi} =r^2
\sqrt{\frac{616}{\pi}} =r
\sqrt{\frac{616(7)}{22}} =r
14=r
3 0
4 years ago
A type of long-range radio transmits data across the Atlantic Ocean. The number of errors in the transmission during any given a
Marianna [84]

Answer:

32.33% probability of having at least 3 erros in an hour.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

In which

x is the number of sucesses

e = 2.71828 is the Euler number

\mu is the mean in the given time interval.

The mean number of errors is 2 per hour.

This means that \mu = 2

(a) What is the probability of having at least 3 errors in an hour?

Either you have 2 or less errors in an hour, or we have at least 3 errors. The sum of the probabilities of these events is decimal 1. So

P(X \leq 2) + P(X \geq 3) = 1

We want P(X \geq 3)

So

P(X \geq 3) = 1 - P(X \leq 2)

In which

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

P(X = 0) = \frac{e^{-2}*(2)^{0}}{(0)!} = 0.1353

P(X = 1) = \frac{e^{-2}*(2)^{1}}{(1)!} = 0.2707

P(X = 2) = \frac{e^{-2}*(2)^{2}}{(2)!} = 0.2707

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.1353 + 0.2707 + 0.2707 = 0.6767

P(X \geq 3) = 1 - P(X \leq 2) = 1 - 0.6767 = 0.3233

32.33% probability of having at least 3 erros in an hour.

6 0
3 years ago
Thurman put $90 into a CD that pays 4.4% interest. According to the rule of
zavuch27 [327]

Answer:

B-16.4 years

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • A computer code is based on the prime factorization of 160. Find the prime factorization of 160
    7·2 answers
  • Write as a mixed number:<br> 25/3
    13·2 answers
  • Tara and Jody's bedrooms are shaped like rectangles. Tara's bedroom is 9 ft long and 8 ft wide. Jody's bedroom is 7ft long and 1
    12·1 answer
  • What is the gcf of x^5 y^3 , x^6 y^6<br>​
    11·1 answer
  • Convert units to complete each equation. 61/2 ft = ___ in?
    14·2 answers
  • helppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp pppppppppppppppppplllllllllllllzzzzzzzzzzz
    8·2 answers
  • 10
    10·1 answer
  • HELP QUICK <br> This is kn a timed quiz plz help
    15·1 answer
  • The sum of three consecutive multiples of 10 is 150. find the multiples
    13·1 answer
  • 4x + 5 =x -4 what is the answer to this math question
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!