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marissa [1.9K]
3 years ago
14

Shown here is a frequency distribution for the rise in tides at 30 selected locations in the U.S.Find the variance and standard

deviation
Mathematics
2 answers:
SSSSS [86.1K]3 years ago
8 0
It’s is going to be 15 since 30/2 equals 15
stiks02 [169]3 years ago
4 0
Answer: 15 since 30/2 equals 15
hope this helps:D


plz give me brainiest
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A trade magazine routinely checks the​ drive-through service times of​ fast-food restaurants. Upper AA 9595​% confidence interva
Butoxors [25]

Answer:

One can be 95% confident that the drive-through service times of​ fast-food chain is between 169 seconds and 172 seconds.

Step-by-step explanation:

The confidence interval gives a range of value for the population mean or parameter, which is calculated from the statistic value of the data (that is sample statistic). This range gives the interval which is associated with a certain level of confidence for which the interval will contain the true value of the unknown parameter (true value). In the scenario above, the associated confidence level is 95%.Hence, we can be 95% confident that the true value will be continued with the interval (169 ; 172)

6 0
3 years ago
Write a two-column proof. Given: line BD bisects angle CBE. Prove: angle ABD approximately equal to angle FBD.
ale4655 [162]

Answer:

The proof is derived from the summarily following equations;

∠FBE + ∠EBD = ∠CBA + ∠CBD

∠FBE + ∠EBD = ∠FBD

∠CBA + ∠CBD = ∠ABD

Therefore;

∠ABD ≅ ∠FBD

Step-by-step explanation:

The two column proof is given as follows;

Statement {}                                       Reason          

\underset{BD}{\rightarrow} bisects ∠CBE {}                            Given

Therefore;

∠EBD ≅ ∠CBD  {}                              Definition of angle bisector

∠FBE ≅ ∠CBA {}                                Vertically opposite angles are congruent

Therefore, we have;

∠FBE + ∠EBD = ∠CBA + ∠CBD {}     Transitive property

∠FBE + ∠EBD = ∠FBD {}                    Angle addition postulate

∠CBA + ∠CBD = ∠ABD {}                   Angle addition postulate

Therefore;

∠ABD ≅ ∠FBD        {}                          Transitive property.

3 0
3 years ago
In parallelogram ABCD below, AC is a diagonal, the
Vinil7 [7]

Step-by-step explanation:

  • ABCD parallellogram
  • m< B = m< D = 40
  • in triangle ACD :

m < CAD = 180 - ( 40 + 57 ) = 83

7 0
3 years ago
Please help Right answers only!!!
sesenic [268]
To find a slope we have to use this equation:
(y2 - y1 )/(x2 - x1)
and we have two x's and y's
so we will put them in their places....so (1-(-5))/(4-2)
and we will get 6/2 which is 3
Its A.3
.............
5 0
3 years ago
a garden is in the shape of a rectangle 35 feet long and 29 feet wide. if fencing cost $7 a foot, what will it cost to plate fen
miskamm [114]
It would cost $896 to plate fencing around the garden
4 0
3 years ago
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