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3 years ago

Which relation is a function?

Mathematics

2 answers:

MAXImum [283]3 years ago

6 0

<h3>Answer: Choice B</h3>

Choice B shows each input going to exactly one output. Therefore it is a function.

Choices A, C, and D have one input leading to more than one output. For example, the input -5 in choice C goes to more than one output (-2 and 3). This is why choices A, C, and D are not functions.

Romashka [77]3 years ago

5 0

Answer:

The second one

Step-by-step explanation:

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Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

blsea [12.9K]

Answer:

a) Percentage of students scored below 300 is 1.79%.

b) Score puts someone in the 90th percentile is 638.

Step-by-step explanation:

Given : Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.

(a) If the average test score is 510 with a standard deviation of 100 points.

To find : What percentage of students scored below 300 ?

Solution :

Mean $\mu=510$ ,

Standard deviation $\sigma=100$

Sample mean $x=300$

Percentage of students scored below 300 is given by,

$P(Z\leq \frac{x-\mu}{\sigma})\times 100$

$=P(Z\leq \frac{300-510}{100})\times 100$

$=P(Z\leq \frac{-210}{100})\times 100$

$=P(Z\leq-2.1)\times 100$

$=0.0179\times 100$

$=1.79\%$

Percentage of students scored below 300 is 1.79%.

(b) What score puts someone in the 90th percentile?

90th percentile is such that,

$P(x\leq t)=0.90$

Now, $P(\frac{x-\mu}{\sigma} < \frac{t-\mu}{\sigma})=0.90$

$P(Z< \frac{t-\mu}{\sigma})=0.90$

$\frac{t-\mu}{\sigma}=1.28$

$\frac{t-510}{100}=1.28$

$t-510=128$

$t=128+510$

$t=638$

Score puts someone in the 90th percentile is 638.

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3 years ago

1)A student earned a grade of 80% on a math test that had 60 problems. How many

FrozenT [24]

Answer:

Step-by-step explanation:

80% = .8

60 x .8 = 48

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2 years ago

Read 2 more answers

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Tems11 [23]

9514 1404 393

Answer:

[-4,3]

Step-by-step explanation:

The domain is the left-right (horizontal) extent of the function. The dots at the end of the continuous line are solid, so the brackets on the interval are square brackets.

The left dot is at x=-4; the right dot is at x=3, so the domain is ...

[-4,3]

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2 years ago

Mason collects seashells each year on the family trip to Sanibel Island. He has 90 whelks, which is 37.5% of his

anastassius [24]

Answer:420

Step-by-step explanation x=90/0.375

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2 years ago

Given a circle with radius of 2, which is the degree measure of an arc whose length is 1/2 ?

Finger [1]

180 degrees. It would be half of the circle.

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3 years ago