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Eddi Din [679]
2 years ago
10

a group of 625 students has a mean age of 15.8 years with a standard deviation of 1.2 years. the ages are normally distributed.

about how many students in this sample are younger than 17?
SAT
1 answer:
valkas [14]2 years ago
4 0

Answer: 16.2-15.8/0.6=0.6667. Use normalcdf() to find the percentage from -999 to 0.6777 which is 0.7476*625=467

Explanation:

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Why is the answer for 23 C?<br><br>and why isn't it D?​
Vaselesa [24]

Answer:

C

Explanation:

The answer is not D because the money is doubling every n years. We do not need to know what n equals to know that since n is doubling, this is an exponential function. The graph in D is going at a constant rate, and exponential functions do not increase/decrease at a constant rate. This also eliminates A. B is not correct because the money will keep increasing and not decrease eventually like the graph in B shows.

4 0
3 years ago
The function f is continuous on the interval (0,16), and f is twice differentiable except at x=5 where the derivatives are undef
Oliga [24]

Using it's definition, it is found that the function f(x) has a point of inflection at:

A. x = 8 only.

<h3>What are the points of inflection of a function?</h3>
  • The critical points of a function are the <u>values of x</u> for which:

f^{\prime\prime}(x) = 0

  • Additionally, there has to be a change in the sign of f^{\prime\prime}(x)

Researching the problem on the internet, it is found that:

  • For 0 < x < 5, f^{\prime\prime}(x) > 0.
  • For x = 5, f^{\prime\prime}(x) is undefined.
  • For 5 < x < 8, f^{\prime\prime}(x) < 0.
  • For x = 8, f^{\prime\prime}(x) = 0.
  • For 8 < x < 12, f^{\prime\prime}(x) > 0.
  • For x = 12, f^{\prime\prime}(x) = 0.
  • For 12 < x < 16, f^{\prime\prime}(x) > 0.

The two conditions, f^{\prime\prime}(x) = 0 and a change in the signal of f^{\prime\prime}(x) are only respected at x = 8, which is the lone inflection point.

You can learn more about points of inflection at brainly.com/question/10352137

7 0
2 years ago
A 0. 75-kg ball is attached to a 1. 0-m rope and whirled in a vertical circle. The rope will break when the tension exceeds 450
8090 [49]

At the bottom of the circle, the ball is being pulled upward by tension in the rope and downward by its own weight, so that the net force on it is

∑ F = 450 N - (0.75 kg) g = (0.75 kg) a

where a is centripetal acceleration. At this maximum tension, the ball has a maximum centripetal acceleration of

a = (450 N - (0.75 kg) g) / (0.75 kg) = 590.2 m/s²

Then its maximum tangential speed v is such that

a = v² / (1.0 m)

⇒   v = √((1.0 m) a) ≈ 25 m/s

7 0
2 years ago
What do you understand by Adventure tourism. Explain the differents of Adventure tourism ​
Rom4ik [11]

Answer:

Adventure tourism is defined as the movement of the people from one to another place outside their comfort zone for exploration or travel to remote areas, exotic and possibly hostile areas. ... Adventure travel is a leisure activity that takes place in an unusual, exotic, remote or wilderness destination.

Explanation:

3 0
3 years ago
Why are the elements of a autobiographical narrative similar to those of a short story?
levacccp [35]
We can automatically rule out answer A, as short stories are not exclusively about the writers life.

That leaves B. C. and D.

B is incorrect as it is too vague in nature.

D is also incorrect as not all short stories are true or non fiction.

And so by process of elimination, the answer is C.
8 0
3 years ago
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