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3 years ago

The heights of 500 students at a local school were recorded and found to be approximated by the normal curve below. Which

Mathematics

1 answer:

Sunny_sXe [5.5K]3 years ago

5 0

Answer:

option C.

Step-by-step explanation:

The given graph is the bell shaped graph.

From the graph we can observe that the peak is at 69.

So, the mean of the data is = 69 .

Standard deviation is the deviation of the graph from the mean value.

= 72-69 = 3

Hence, the standard deviation is equal to 3.

So, the correct answer is option C.

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The fare for a taxi cab is $2.50 per passenger and $0.75 for each mile. A group of friends has $22.00

xeze [42]

For this case we have to:

x: Let the variable representing the number of people to travel in the group

y: Let the variable representing the number of miles traveled.

If friends only have $22 then we have the following inequality:

$2.50x + 0.75y \leq22$

Now, if there are three people in the group we have that $x = 3.$

$2.50 (3) + 0.75y \leq22\\7.5 + 0.75y \leq22\\0.75y \leq22-7.5\\0.75y \leq14.5\\y\leq \frac {14.5} {0.75}\\y\leq19.33$

The taxi can travel a maximum of 19.33 miles.

On the other hand, if the group wants to travel 10 miles then we have to y = 10.

$2.50x + 0.75 (10) \leq22\\2.50x + 7.5 \leq22\\2.50x \leq22-7.5\\2.50x \leq14.5\\x\leq \frac {14.5} {2.50}\\x \leq5.8$

Thus, they could travel a maximum of 5 people.

ANswer:

$2.50x + 0.75y \leq22$

Traveling 3 people, the taxi can travel a maximum of 19.33 miles

Traveling 10 miles, a maximum of 5 people can travel

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3 years ago

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mr Goodwill [35]

The answer is 6n^3+n^2+6n-4 I hope I helped you!

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Which of the following does NOT have any rectangular faces

Sveta_85 [38]

B. A hexagonal prism would have every side be a hexagon or a triangle.

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The probability that you roll a 5 on a six-sided die is start fraction one over six end fraction . The probability that you flip

Anarel [89]

I am not sure about the probability but I cant tell you these events are independent because u don't need to roll a five for a coin to land on heads

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Find the value of x and y

Zolol [24]

2x=9-y
3y=x-8

y=9-2x
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35=7x
x=5

2*5=9-y
10=9-y
y-1

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3 years ago