What is the answer & how did you get it?

Which question is a statistical question? A Which U.S. States have mountains?Which U.S. States have mountains? B Which mountain

erastovalidia [21]

Answer: C. How many mountain ranges are in the U.S.

Step-by-step explanation:

A statistical question first of all has to have a quantitative response i.e., answers should be in numbers.

The only two questions here that would yield a numeric answer are options C and D.

Furthermore, a statistical question has variability in it which means that the answer is based on multiple observations not just one. The observations in option C are mountain ranges and as the question requires finding out details about multiple mountain ranges, this is a statistical question.

This is opposed to option D which addresses issues surrounding just one mountain.

5 0

3 years ago

What’s a(c-b) if a=2 and b=3 and c=9

exis [7]

Answer:

12

Step-by-step explanation:

a = 2

b = 3

c = 9

a(c - b)

2(9 - 3)

2(6)

12

8 0

3 years ago

Read 2 more answers

Which statement is true of the function f(x) = -3/x? Select three options.

melamori03 [73]

<h2>Answer:</h2>

We have the following function:

$f(x)=-\frac{3}{x}$

The graph of this function has been plotted below. So lets analyze each statement:

<h3>1. The function is always increasing. </h3><h3>False</h3>

As you can see x increases from -∞ to 0 and decreases from 0 to +∞

<h3>2. The function has a domain of all real numbers. </h3><h3>False</h3>

The function is undefined for $x=0$ since x is in the denominator.

<h3>3. The function has a range of {yl- </h3>

Statement is unclear but the range is the set of all real numbers except zero.

<h3 /><h3>4. The function is a reflection of y = 3. </h3><h3>False</h3>

The function is a reflection in the x axis of the function $g(x)=\frac{3}{x}$

<h3>5. The function passes through the point (3,-27).</h3><h3>False</h3>

This is false since:

$f(3)=-1\neq -27$

Note. As you can see those statements are false, so any of them is true, except item 3 that is unclear.

7 0

3 years ago

Read 2 more answers

Six students, A, B, C, D, E, F, are to give speeches to the class. The order of speaking is determined by random selection. Find

postnew [5]

Answer:

a) 16.7% probability that E will speak first.

b) 3.33% probability that C will speak fifth and B will speak last.

c) 0.14% probability that the students will speak in the following order: DECABF.

d) 33.33% probability that A or B will speak first.

Step-by-step explanation:

The first speaker can be any of them. The second can be any of them bar the first. It continues until the last one. So the total number of outcomes is 6! = 720.

(a) E will speak first

The first one to speak is E.

The other five can be selected in any order. So there are 5! = 120 total outcomes in which E speaks first.

There is a 120/720 = 0.167 probability that E will speak first.

(b) that C will speak fifth and B will speak last

The fifth can only be C and the sixth can only be B.

The first four can be selected in any order. So there are 4! = 24 outcomes in which C speaks fifth and B last.

There is a 24/720 = 0.0333 probability that C will speak fifth and B will speak last.

(c) that the students will speak in the following order: DECABF

This is the only possible outcome in this order.

So there is a 1/720 = 0.0014 = 0.14% probability that the students will speak in the following order: DECABF.

(d) that A or B will speak first.

For A first, the following five can be in any order. So there are 5! = 120 outcomes in which A speaks first. The same logic and result for B.

So there are 240 outcomes in which A or B speaks first.

There is a 240/720 = 0.3333 = 33.33% probability that A or B will speak first.

5 0

3 years ago

Clare estimates that her brother is 4 feet tall. When they get measured at the doctor’s office, her brother’s height is 4 feet,

ankoles [38]

Answer:

1: The doctor's measurement.

Step-by-step explanation:

The doctor's measurement is correct because the doctor measured Claire's brother and Claire only estimated, therefore there is no evidence that Claire is correct but there's Is evidence that the doctor is correct.

5 0

3 years ago