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4 years ago

How do you do these 4 questions and the reasons?

Mathematics

1 answer:

Afina-wow [57]4 years ago

4 0

Step-by-step explanation:

"There are several flights that have very long delays."

True. On the boxplot, we can see several outliers greater than the maximum.

"More than 25% of flights are either exactly on time or arrive early."

False. According to the 5 number summary, 25% of the flights are between -55 and 13. So less than 25% of the flights are on time or early.

"About 50% of flights are delayed between 13 and 35 minutes."

False. According to the 5 number summary, 25% of the flight times are less than 13 minutes, and 50% of the flights are less than 35 minutes. So 25% of the flights are delayed between 13 and 35 minutes, not 50%.

"About 25% of flights are delayed by more than 78 minutes."

True. According to the 5 number summary, 75% of the flights are delayed less than 78 minutes. Which means 25% of the flights are delayed more than 78 minutes.

You might be interested in

Question number four part A :)

atroni [7]

Since angles EFA, AFB, and BFC lie on a straight line, then they must add up to 180° (angle sum of a straight line)

So, 7x + 4 + 8x + 6 + 6x + 2 = 180
21x + 12 = 180
21x = 168
x = 8

3 0

4 years ago

Read 2 more answers

Maxine spent 15 hours doing her homework last week. This week she spent 18 hours doing homework. She says that she spent 120% mo

marysya [2.9K]

Answer:

Yes

Step-by-step explanation:

120

1.2

If Maxine is correct, then she spent

1.2

times the hours she did homework than last week.

⋅

1.2

18.0

15 hours

⋅

1.2

18.0 hours

18 hours

This means that Maxine is correct.

4 0

3 years ago

Read 2 more answers

Identify the domain and range of each function. Make sure to provide these answers using inequalities.

yulyashka [42]

Answer:

a. Domain: (-∞, ∞)

Range: (0,∞)

b. Domain: (-∞, ∞)

Range: (0,∞)

c. Domain: (-∞, ∞)

Range: (-∞,0)

d. Domain: (-∞, ∞)

Range: (-∞,0)

e. Domain: (-∞, ∞)

Range: (0,∞)

Step-by-step explanation:

$a. y= 3(2)^x \\b. y= 7(0.4)^x \\c. y = -2(0.6)^x \\d. y = -3(4)^x \\e. y = 2(22)^x$

These equations are all exponential functions. Exponential functions are curves which approach a horizontal asymptote usually at y=0 or the x-axis unless a value has been added to it. If it has, the curve shifts. None of these have that and their y - values remain between 0 and ∞. This is the range, the set of y values.

However, the range of exponentials can change based on the leading coefficient. If it is negative the graph flips upside down and its range goes to -∞. C and D have this. Their range is (-∞, 0)

In exponential functions, the x values are usually not affected and all are included in the function. Their domain is (-∞, ∞). All of these equations have this domain.

a. Domain: (-∞, ∞)

Range: (0,∞)

b. Domain: (-∞, ∞)

Range: (0,∞)

c. Domain: (-∞, ∞)

Range: (-∞,0)

d. Domain: (-∞, ∞)

Range: (-∞,0)

e. Domain: (-∞, ∞)

Range: (0,∞)

5 0

3 years ago

Mika earns $25 for every 3 hrs of work. Calder earns $15 for every 2 hrs of work. If Calder works long enough to earn the same a

asambeis [7]

Calder would have to work 10 hours to equal the same amount Mika has from 9 hours of work

Here's how:
Since Mika works 9 hours and she gets 25 per 3 hours, to get her amount for 9 hours, you times 25 by 3 which is 75

Now you need to set up a equation
To make it easier. you can divide 15 by 2, which is 7.5, to get a unit rate
After that you can set up your equation
7.5x=75
x=10
Hope this helps:)

6 0

3 years ago

How do i find the area of this triangle?

Airida [17]

Answer: do you know the area or width?

Step-by-step explanation:

3 0

3 years ago