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8090 [49]
3 years ago
13

Can someone help me with this question please and thank you.

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

its porpotional

Step-by-step explanation:

hope this helps

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Let f(x) = xe−x if x ≥ 0 and f(x) = 0 if x &lt; 0<br> Is f a probability density function?
Lynna [10]

Yes. f(x) is a PDF if

• f(x) \ge 0 for all x in the support; this is true, since e^{-x}>0 for all x, and multiplying a positive number x doesn't change this fact;

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\displaystyle \int_{-\infty}^\infty f(x) \, dx = \int_0^\infty xe^{-x} \, dx = 1

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3 0
1 year ago
Chain complete 40% of her homework on Monday and 2/3 on Tuesday if she started her homework on Monday what fractional part of he
kotykmax [81]

Answer:

1/5

Step-by-step explanation:

For Monday

The fraction of homework Chain completed =

40% of her homework

= 40% = 40/100

= 2/5

For Tuesday

The amount of home work left =

= 1 - 2/5

3/5

The fraction of homework Chain completed on Tuesday = 2/3

= 2/3 Of 3/5

= 2/3 × 3/5

= 2/5

Let the total complete homework be represented by 1

Hence:

The Fractional part of her homework left for her to complete after Tuesday =

1 - (2/5 + 2/5)

Lowest common denominator is 5

= 1 - (2 + 2/5)

= 1 - (4 /5)

= 1/5

8 0
2 years ago
A science teacher gives a test with 15 questions. This teacher is a hard grader. The teacher assigns points in the following man
ASHA 777 [7]

Answer:  The standard deviation was calculated incorrectly.

Step-by-step explanation:

  • The standard deviation measures the dispersion of the data values from the mean value.

It cannot be negative , because it is the square root of the variance .

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Since , any squared number cannot give a negative result.

⇒ Standard deviation cannot be negative.

⇒The standard deviation was calculated incorrectly.

Rest other things (given in options) can not be interpreted on the basis of given information.

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3 years ago
50 POINTS!PLEASE HELP
Mamont248 [21]

Step-by-step explanation:

For no 1...

The range is [ -9, -7, 1]

For no 2....

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For no 3.....

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4 0
3 years ago
Read 2 more answers
99 POINTS
Norma-Jean [14]
The answers are B and D hope this helps.
7 0
3 years ago
Read 2 more answers
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