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3 years ago

What is the answer PLEASEE

Mathematics

1 answer:

umka2103 [35]3 years ago

8 0

Answer:

$3^{-4}$

Step-by-step explanation:

$3^5\cdot \:3^{-9}=3^{5-9}=3^{-4}$

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At a train station, freight trains depart at a rate of 2 trains every 30 minutes and passenger trains depart at a rate of 1 trai

never [62]

In my work I used t=trains and m=minutes:
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
30+30= 60m/2t
Total= 720m/24t

1:30+1:30+1:30+1:30+1:30+1:30+1:30+1:30+1:30+1:30+1:30+1:30= 4 o' clock
Total= 372m/12t

24t+12t= 36t

The answer is:
36 trains in total

6 0

2 years ago

The average number of newspapers for sale in an airport stand is 15. SD is 6. The average age of the pilots is 36 and SD is 4. W

balu736 [363]

Answer:

The average age of pilots has a lower coefficient of variation, so it is the most consistent data set.

Step-by-step explanation:

The coefficient of variation is used to measure consistency of a data set. It is the standard deviation divided by the mean. The higher the coefficient of variation, the more variable, that is, the least consistent the data set is.

The average number of newspapers for sale in an airport stand is 15. SD is 6.

The consistency is:

$C = \frac{6}{15} = 0.4$

The average age of the pilots is 36 and SD is 4.

The consistency is:

$C = \frac{4}{36} = 0.11$

The average age of pilots has a lower coefficient of variation, so it is the most consistent data set.

4 0

3 years ago

Một cộng mười bằng máy

pashok25 [27]

What language are you speaking

7 0

2 years ago

The product of 6 and 12

34kurt

Answer:

Step-by-step explanation:

you just multiply

5 0

2 years ago

Brian measures his height at 160cm to the nearest 10cm.

Elan Coil [88]

Answer:

170 cm is the tallest

3 0

2 years ago