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2 years ago

I do not understand this question I am confused!

Mathematics

2 answers:

kati45 [8]2 years ago

6 0

H is the answer. This is because if you fold 3 in half it won't be equal.

schepotkina [342]2 years ago

5 0

H because if you fold the parallelogram in half then it won't fold in line whereas in all the other shapes they fold right on top of each other

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Under average driving conditions, the life lengths of automobile tires of a certain brand are found to follow an exponential dis

wariber [46]

Answer:

a) $P(X>30000)=1-( 1- e^{-\frac{30000}{30000}})=e^{-1}=0.368$

b) $P(X>30000|X>15000)=P(X>15000)=1-( 1- e^{-\frac{15000}{30000}})=e^{-0.5}=0.607$

Step-by-step explanation:

Previous concepts

The exponential distribution is "the probability distribution of the time between events in a Poisson process (a process in which events occur continuously and independently at a constant average rate). It is a particular case of the gamma distribution". The probability density function is given by:

$P(X=x)=\lambda e^{-\lambda x}, x>0$

And 0 for other case. Let X the random variable that represent "life lengths of automobile tires of a certain brand" and we know that the distribution is given by:

$X \sim Exp(\lambda=\frac{1}{30000})$

The cumulative distribution function is given by:

$F(X) = 1- e^{-\frac{x}{\mu}}$

Part a

We want to find this probability:

$P(X>30000)$ and for this case we can use the cumulative distribution function to find it like this:

$P(X>30000)=1-( 1- e^{-\frac{30000}{30000}})=e^{-1}=0.368$

Part b

For this case w want to find this probability

$P(X>30000|X>15000)$

We have an important property on the exponential distribution called "Memoryless" property and says this:

$P(X>a+t| X>t)=P(X>a)$

On this case if we use this property we have this: $P(X>30000|X>15000)=P(X>15000+15000|X>15000)=P(X>15000)$

We can use the definition of the density function and find this probability:

$P(X>15000)=1-( 1- e^{-\frac{15000}{30000}})=e^{-0.5}=0.607$

7 0

2 years ago

3. Identify each following representation as a function or nonfunctional and explain your reasoning.

Vaselesa [24]

Answer:

1.1

Step-by-step explanation:

I think it.

7 0

2 years ago

Read 2 more answers

The heights of 200 adults were recorded and divided into two categories.

Nesterboy [21]

Answer:

The correct answer would be Table A in your case.

Step-by-step explanation:

12 + 3 = 15

86 + 99 = 185

and 98 + 102 = 200

Meaning those are true statements.

7 0

3 years ago

Can someone help me with question 3? I like to see the working and answer on paper, that would be more helpful, I’m in a hurry

Makovka662 [10]

The steps to draw all the three angles have been explained.

<h3>What is an Angle ?</h3>

An angle is made by two rays that have one common end point known as vertex.

To make an angle congruent to the one given , the angle has to be copied

For making both ∠XYZ and∠ UVW , following steps will be followed.

Draw two rays separately and name it YZ and VW .
Take a compass and draw a free hand arc from the point B and E and with the same measure draw a free hand arc from the point Y and V respectively.
Take the compass to the angle ABC and DEF again , from the point where the arc intersects BC and EF , cut an arc on the ray AB and DE .
With the same measure , keep the compass on the point the free hand arc intersected on the ray YZ and VW , cut the arc by the new arc .
The point where both the arc intersects will be joined form the end points , Y and V , to form an angle.
The angle formed will be copy of ∠ABC and∠ DEF

Now to draw RST = ABC + DEF