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
kramer
3 years ago
7

I have no idea what im doing lol pleasee help

Mathematics
1 answer:
Harman [31]3 years ago
8 0

Answer:

Your answer would be 254.47

Step-by-step explanation:

Here, you can use this formula A=πr2

You might be interested in
"Use the graph to fill in the blank with the correct number.<br><br> f(1) = _______"
Lisa [10]
         In the graph it is the point with x- coordinate 1 and y-coordinate - 2
Answer:  f ( 1 ) = - 2
7 0
3 years ago
Use the graph below to find the coordinates of J'after J(-5, 1) was reflected over the linex=-3.
k0ka [10]

Answer:

J's would be (-5,-4) if J was reflected over the line x=3.

7 0
3 years ago
A distribution of values is normal with a mean of 220 and a standard deviation of 13. From this distribution, you are drawing sa
Paraphin [41]

Answer:

The interval containing the middle-most 48% of sample means is between 218.59 to 221.41.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributied random variable X, with mean \mu and standard deviation \sigma, the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 220, \sigma = 13, n = 35, s = \frac{13}{\sqrt{35}} = 2.1974

Find the interval containing the middle-most 48% of sample means:

50 - 48/2 = 26th percentile to 50 + 48/2 = 74th percentile. So

74th percentile

value of X when Z has a pvalue of 0.74. So X when Z = 0.643.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

0.643 = \frac{X - 220}{2.1974}

X - 220 = 0.643*2.1974

X = 221.41

26th percentile

Value of X when Z has a pvalue of 0.26. So X when Z = -0.643

Z = \frac{X - \mu}{s}

-0.643 = \frac{X - 220}{2.1974}

X - 220 = -0.643*2.1974

X = 218.59

The interval containing the middle-most 48% of sample means is between 218.59 to 221.41.

5 0
3 years ago
If DE + EF = DF, and ____________, then the point E is the midpoint of .
gogolik [260]
<span>DE=EF  hope I helped with your studies :)

</span>
5 0
3 years ago
NEED HELP ASAP, I'LL GIVE BRAINLIEST. (EXPLANATION NEEDED) ALGEBRA​
katrin [286]

31x^2 +14y -15x +3\\\\=x(31x-15)+14y+3

4 0
2 years ago
Other questions:
  • A stone is dropped into a barrel of water and sinks to the bottom. The ball is completely covered by water. By how much does the
    5·1 answer
  • John surveyed 30 members of a country club. He found that 9 members had signed up for tennis.
    12·1 answer
  • Help me pls I'm stuck......
    12·1 answer
  • What comes after 1 as a mixed number on a number line
    12·2 answers
  • NEED HELP RN PLZ!!!!!!!!!!!!!!!!!!!!!Complete the square to find the zeros of y=x^2+12x-5?
    8·1 answer
  • if post are spaced 10 feet apart for a straight-line fence of 100 feet,then you would need how many post to hang the fence?
    5·1 answer
  • There is a negative correlation between the number of years in college and earnings.
    10·2 answers
  • Find the area of this parallelogram. Be sure to include the correct unit in your answer.
    9·1 answer
  • What is the value of the question mark in the picture below.
    8·1 answer
  • The passing of heart through a material is called _____
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!