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frozen [14]
3 years ago
13

How do you do these 4 questions and the reasons?

Mathematics
1 answer:
Afina-wow [57]3 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.

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Find S5 for a geometric series for which a1=81 and r=1/9.
Minchanka [31]

ANSWER

S_5=91\frac{10}{81}




EXPLANATION


The sum of the first n terms of a geometric sequence is given by;


S_n=\frac{a_1(1-r^n)}{1-r} ,-1


Where n, is the number of terms and a_1 is the first term.


When n=5, we have a_1=81, we get;


S_5=\frac{81(1-(\frac{1}{9})^5)}{1-\frac{1}{9}}


S_5=\frac{81(1-\frac{1}{59049})}{1-\frac{1}{9}}


S_5=\frac{81(\frac{59048}{59049})}{\frac{8}{9}}




S_5=\frac{7381}{81}


S_5=91\frac{10}{81}




6 0
3 years ago
13 POINTS 13 Points 13 POINTS 13 Points 13 POINTS 13 Points 13 POINTS 13 Points
ira [324]

Answer:

8

Step-by-step explanation:

  • because 16-8≈ 8
5 0
2 years ago
Read 2 more answers
Use substitution to solve each system of equations <br> X=y-2<br> 4x+y=2
Mariulka [41]

Answer:

Step-by-step explanation:

x = y - 2.........(1)

4x + y = 2......(2)

Substituting x in (1) in (2)

4(y - 2) + y = 2

4y - 8 + y = 2

5y = 2 + 8

5y = 10

y = 10/5

y = 2

Putting x in (1)

x = y - 2

x = 2 - 2

x = 0

6 0
3 years ago
PLZ HELP!! A baseball has a diameter of 7.4 centimeters. Which of the following is closest to the surface area of the baseball?
Fynjy0 [20]
SA=4pir^2

d/2=r
d=7.4
7.4/2=3.7
SA=4pi3.7^2
SA=4pi13.69
SA=54.76pi
pi=3.14 for this question
SA=171.9464

closest one is B
172 cm^2



B IS ANSWER
6 0
3 years ago
Drag each expression to show whether it is equivalent to
Kazeer [188]

Answer:

We need to find which expressions are equivalent to 6(c+6), 6c+6 or neither.

6c+12: We extract the greatest common factor which is 6. Remember, when we extract a GCM, we divide each term by it.

6c+12=+(c+2)

Therefore, this expression is equivalent to neither of the given expressions.

2(3c+3): We just need to apply the distributive property.

2(3c+3)=6c+6

Therefore, this expression is equivalen to 6c+6.

We use the same process to the other expressions.

(6c)+(6\times 6)=6c+36=6(c+6)

3c+6+3c=6c+6

6c+36=6(c+6)

(6+c)+(6+6)=c+18, equivalent to neither.

7 0
3 years ago
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