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cupoosta [38]
3 years ago
10

HURRRY!!!

Mathematics
2 answers:
marshall27 [118]3 years ago
5 0

The variance of the set is 579

The population standard deviation for this data set is 24

Aleksandr-060686 [28]3 years ago
4 0

Answer:

579

24

This is correct

Step-by-step explanation:


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A train leaves Roseville heading east at 6:00 am at 40 miles per hour. Another eastbound train leaves on a parallel track at 7:0
Molodets [167]

Answer:

At 11:00 am the both trains will be at same distance away from Roseville

Step-by-step explanation:

The first train was 40 miles away from Roseville at 7:00 am

After some time t the both trains will be at the same distance away from Roseville.

We will make equation for that situation

d- distance      v1= 40mph and v2= 50mph -  velocity

d =  v1*t + 40 = v2*t  => v2*t - v1*t = 40 => t (v2-v1) = 40 -> t = 40/ (v2-v1)

t = 40/(50-40) = 40/10= 4h      t = 4h

7:00 am * 4h = 11:00 am

Good luck!!!

6 0
3 years ago
For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a beverly hi
AleksAgata [21]
The probability any one system works is 0.99
So the probability of any one system failing is 1-0.99 = 0.01, so basically a 1% chance of failure for any one system

Multiply out the value 0.01 with itself four times
0.01*0.01*0.01*0.01 = 0.000 000 01
I'm using spaces to make the number more readable
So the probability of all four systems failing is 0.00000001
Subtract this value from 1 to get
1 - 0.00000001 = 0.99999999

The answer is 0.99999999 which is what we'd expect. The probability of at least one of the systems working is very very close to 1 (aka 100%)
7 0
3 years ago
Liz has a 24 inch ribbon she cuts nine 2 inch pieces from her original ribbon. how much of the original ribbon is left?
Tpy6a [65]
6 inches from the original piece of ribbon is left.
4 0
3 years ago
5*10 divided by 30 -10
sp2606 [1]
The answer to your question would be -25/3

As decimal -8.333333
4 0
2 years ago
plz help quick. the sum of two numbers is 11. Three times the first number minus the second number is -3. what are the numbers?
Lerok [7]

Answer:

the first number is 2, the second number is 9 :)

Step-by-step explanation:

brainliest? :)

6 0
3 years ago
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