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
Fed [463]
3 years ago
6

A library shelf has 3 3 types of books

Mathematics
1 answer:
AfilCa [17]3 years ago
6 0

Answer:

that library has only 3 books? it needs to open a book raising fund

You might be interested in
The cost to produce a batch of granola bars is approximately Normally distributed with a mean of $7.19 and a standard deviation
Bumek [7]

Answer:

0.7780

Step-by-step explanation:

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

Normal probability distribution

When the distribution is normal, we use 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 distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Population:

We have that \mu = 7.19, \sigma = 0.86

Sample of 12:

n = 12, s = \frac{0.86}{\sqrt{12}} = 0.2483

What is the probability that the mean cost will be more than $7.00?

This is 1 subtracted by the pvalue of Z when X = 7. So

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

By the Central Limit Theorem

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

Z = \frac{7 - 7.19}{0.2483}

Z = -0.765

Z = -0.765 has a pvalue of 0.222

1 - 0.222 = 0.778

So the answer is 0.7780

6 0
3 years ago
In a search engine, 40,000 searches are done every minute.
ELEN [110]

Answer:

2400000 in a hour

Step-by-step explanation:

40,000 × 60 = 2400000 you need to multiple 40,000 with 60 because there is 60 minutes in a hour

6 0
3 years ago
Which is more, 30 pints or 4 gallons?
Gala2k [10]

Answer:

4 gallons

Step-by-step explanation:

There are 8 pints in a gallon.

4 gallons=32pints

Therefore 4 gallons is more than 30 pints.

I hope this helps, and have a great day! :)

5 0
3 years ago
Read 2 more answers
PLEASE HELP I PUT THE PROBLEM AS A PICTURE PLEASE ANSWER WILL GIVE 30 POINTS SHOW WORK
dem82 [27]

Answer:

\huge\boxed{9}

Step-by-step explanation:

\sf (2^8 * 3^{-5} * 6^0)^{-2 } (\frac{3^{-2}}{2^3} )^4*2^{28}

Rule of exponents a^0 = 1 , 1/a^m = a^{-m}

=> \sf 2^{8*-2} * 3 ^{-5*-2} * 3 ^{-2}* 2^{-3*4} * 2^{28}

=> \sf 2 ^ {-16} * 3^{10} * 3^{-8} * 2 ^{-12}* 2^{28}

Combining same bases

=> \sf 2 ^ {-16} * 2 ^{-12}* 2^{28}* 3^{10} * 3^{-8}

When bases are same , powers are to be added

=> \sf 2 ^{-16-12+28} * 3^{10-8}

=> \sf 2^{-28+28} * 3^2

=> \sf 2^0 * 3^2

=> \sf 3^2

=> 9

8 0
3 years ago
Question 2<br> Which TWO expressions are equivalent to<br> 1/2(2/3x-4)-2(1/4x-3)
VMariaS [17]

answer:

- 1/6 x + 4

steps by steps:

8 0
3 years ago
Other questions:
  • What is an algebraic expression for five less than threes times the length, l
    15·1 answer
  • Which expression is equivalent to 12 times 12 times 12 times 12 times 12 times 12 times 12 times 12 times 12 times 12 times 12?
    7·2 answers
  • Please help me on these two questions!
    14·1 answer
  • Caroline, Krutika and Natasha share some sweets in the ratio 2:5:3. Caroline gets 12 sweets. How many more sweets does Krutika g
    15·1 answer
  • Use the Pythagorean’s theorem to calculate the length of the hypotenuse of a right triangle with 17 as the length and 15 as the
    13·2 answers
  • A squares side are increased by five inches. Find the length of the original square if the perimeter of the new square is 100 in
    14·1 answer
  • Which expressions are equivalent to 5+(-3)(6x-5)5+(−3)(6x−5)5, plus, left parenthesis, minus, 3, right parenthesis, left parenth
    6·1 answer
  • The system of equations 3x + 9y^3= -21, 13y^3+4x=-1 has exactly one solution.
    8·1 answer
  • The WSJ lists a bond as Acme 9s13 and the price as 89.875. If your required rate of return is 10%, would you buy one of these bo
    14·1 answer
  • Deon throws a ball into the air. The height h of the ball, in meters, at time t seconds is modeled by the function
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!