Which of the following best describes a plane ?

2 answers:

7 0

The best example of a plane would be A) the surface of a flat table. A plane could also be represented by anything that is flat in nature.

Hope this helps! :)

jekas [21]3 years ago

6 0

Answer: option A. the surface of a flat plane.

Justification:

A plane in geometry is an infinite surface that does not have curvature, which means it is flat

It is an idealization and it does not have thickness and is unlimited in width and length. Those are the properties of a plane.

Here you have some examples that may represent the idea of a plane:

1) The surface of a hardcover book

2) The surface of the floor of a house

3) The surface of a wall

4) The surface of a flat mirror.

So, the clue to distinguish the correct answer is the word flat.

Rgarding the other options, the B. the edge of a desk describes a line, the C. describes a curve, and the D. describes a point.

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A real estate agent has 19 properties that she shows. She feels that there is a 30% chance of selling any one property during a

netineya [11]

Answer:

$P(X \geq 5)=1-P(X$

We can find the individual probabilities:

$P(X=0)=(19C0)(0.3)^0 (1-0.3)^{19-0}=0.00114$

$P(X=1)=(19C1)(0.3)^1 (1-0.3)^{19-1}=0.0092$

$P(X=2)=(19C2)(0.3)^2 (1-0.3)^{19-2}=0.0358$

$P(X=3)=(19C3)(0.3)^3 (1-0.3)^{19-3}=0.0869$

$P(X=4)=(19C4)(0.3)^4 (1-0.3)^{19-4}=0.1491$

And replacing we got:

$P(X \geq 5) = 1-[0.00114+0.009282+0.0358+0.0869+0.149]= 0.7178$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=19, p=0.3)$