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
maxonik [38]
3 years ago
15

9x9= 8x8= 8x7= 5x4= Vă rog să mă ajutați

Mathematics
2 answers:
sergiy2304 [10]3 years ago
4 0

Answer:

9×9=72

8×8=64

8×7=56

5×4=20

andreev551 [17]3 years ago
4 0

Answer

9x9=81

8x8=64

8x7=56

5x4=20

Step-by-step explanation:

You might be interested in
A consensus forecast is the average of a large number of individual analysts' forecasts. Suppose the individual forecasts for a
zaharov [31]

Answer:

a) P(X>3.5)=P(\frac{X-\mu}{\sigma}>\frac{3.5-\mu}{\sigma})=P(Z>\frac{3.5-5}{1.2})=P(z>-1.25)

And we can find this probability using the complement rule:

P(z>-1.25)=1-P(z

b) P(X

And we can find this probability uing the normal standard table:

P(z

c) P(3.5

And we can find this probability with this difference:

P(-1.25

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.  

P(-1.25

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(5,1.2)  

Where \mu=5 and \sigma=1.2

We are interested on this probability

P(X>3.5)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>3.5)=P(\frac{X-\mu}{\sigma}>\frac{3.5-\mu}{\sigma})=P(Z>\frac{3.5-5}{1.2})=P(z>-1.25)

And we can find this probability using the complement rule:

P(z>-1.25)=1-P(z

Part b

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability uing the normal standard table:

P(z

Part c

P(3.5

And we can find this probability with this difference:

P(-1.25

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.  

P(-1.25

3 0
3 years ago
Can someone please help me on this?
xz_007 [3.2K]

Answer:

The surface area of the green prism is 2.5 times greater than the surface area of the blue prism

5 0
2 years ago
A manufacturing company measures the weight of boxes before shipping them to the customers. If the box weights have a population
NikAS [45]

Answer:

<u>The probability that the average weight of the boxes will exceed 94 pounds  is 43.25%</u>

Step-by-step explanation:

1. Let's review the information provided to answer the question correctly:

Mean of the population of box weights = 90 pounds

Standard deviation of the population of box weights = 24 pounds

Sample size = 36 boxes

2. What is the probability that the average weight of the boxes will exceed 94 lb?

For answering this question, we will use the z-scores table.

For using the correct z-score, we should use the correct standard deviation. In this case, we have that:

94 - 90 = 4 pounds above the mean.

4 pounds are 4/24 of the standard deviation,

therefore, simplifying:

4/24 = 1/6 = 0.1666......and we'll round to 0.17

z-score is 0.17 because 4 pounds is 1/6 of the standard deviation (24).

The probability of a z-score is 0.5675, but in this case we're asked by a weight over 94 pounds, not under 94 pounds, thus:

1 - 0.5675 = 0.4325

<u>The probability that the average weight of the boxes will exceed 94 pounds  is 43.25%</u>

8 0
2 years ago
A cabinetmaker buys 3.5 liters of oak varnish. The varnish costs $4.95 per liter. How much does 0.5 liters of varnish cost?
victus00 [196]

Answer:

$2.47

Step-by-step explanation:

The cabinetmaker would have paid $13.31 for everything.

5 0
3 years ago
Read 2 more answers
What is the interquartile range?<br> The interquartile range is __
xenn [34]

Answer:

<em>Your IQR or interquartile range is 2.</em>

Step-by-step explanation:

Median: 3

lower quartile: 2

upper quartile: 4

Interquartile range: upper quartile - lower quartile = answer

Interquartile range: 4 - 2 = 2

~hope this helps~

I would highly appreciate it if you give me the brainliest~ :)

4 0
3 years ago
Other questions:
  • The width of a rectangular room is 55% of its length. The length of the room is 20 feet. What is the area of the room?
    14·1 answer
  • Solve for the variable x^2 - 8 = -1 Show all work please
    10·1 answer
  • Six multiplication problems involved in solving 325 x 89
    14·1 answer
  • A restaurant has two different seating options: a table and a family booth. A table can seat 2 people, and a family booth can se
    11·1 answer
  • Which angles are adjacent to eachother
    8·1 answer
  • 3) The cost of different sizes of orange juice are shown in the table.
    11·2 answers
  • 1. Simplify: (6-√5)(5+√5)
    5·2 answers
  • What is the measure of angle R ?<br> hey guys 50 points! plz help in middle of my final
    7·1 answer
  • Triangle PQR is transformed to triangle P′Q′R′. Triangle PQR has vertices P(4, 0), Q(0, −4), and R(−8, −4). Triangle P′Q′R′ has
    7·1 answer
  • For what value of x is the equation 2x-3 over -3+4 =3 true
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!